Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Long-term notes receivable, net of current portion - founding members Long-term portion of note receivable - founding members Financing Receivable, after Allowance for Credit Loss, Noncurrent Letters of Credit [Member] Letter of Credit [Member] Payment to founding members under TRA Payment To Founding Members Under Tax Sharing Arrangement Payment to founding members under tax sharing arrangement. Number of restricted shares and restricted stock units, Vested (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period Current State Current State and Local Tax Expense (Benefit) Advertising operating costs Advertising Operating Costs [Member] Advertising Operating Costs [Member] Leasehold improvements Leasehold Improvements [Member] Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Receivable Type Receivable Type [Axis] Total amounts due to founding members, net Related Party Transaction, Due from (to) Related Party Regal Regal Entertainment Group [Member] Regal entertainment group. Cash dividends declared Dividends, Common Stock, Cash Redemption Premium Redemption Premium Security Exchange Name Security Exchange Name On-screen advertising time to satisfy agreement obligations, in seconds Length Of On Screen Advertising Time To Satisfy Agreement Obligations The length of on-screen advertising time to satisfy agreement obligations. Quarterly Financial Information Disclosure [Abstract] Quarterly Financial Information Disclosure [Abstract] Weighted average grant-date fair value, Forfeited (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Contract with Customer, Asset and Liability Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Options, Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Forfeitures in Period Operating Lease, Weighted Average Remaining Lease Term Operating Lease, Weighted Average Remaining Lease Term Financing Receivable, after Allowance for Credit Loss, Current Current portion of notes receivable - founding members Financing Receivable, after Allowance for Credit Loss, Current Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Schedule of Share-based Compensation Arrangements by Share-based Payment Award [Table] Investment, Name Investment, Name [Axis] Common stock available for grants Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant Common membership units surrendered, compensation for lost operating income Common Membership Units Surrendered Compensation For Lost Operating Income For Divested Theaters Term Common membership units surrendered, compensation for lost operating income for divested theaters, term. CHANGE IN CASH AND CASH EQUIVALENTS Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Guarantee obligations amount paid Guarantee Obligations Amount Paid Guarantee obligations amount paid. Less: Noncontrolling interests Effective Income Tax Rate Reconciliation, Noncontrolling Interest Income (Loss), Amount Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Volatility Rate 2020 Long-Term Debt, Maturity, Year Two Intrinsic value of options exercised Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercises in Period, Intrinsic Value Certificates of Deposit Certificates of Deposit [Member] Provision for bad debt SEC Schedule, 12-09, Valuation Allowances and Reserves, Additions, Charge to Cost and Expense Subsequent Event Type Subsequent Event Type [Domain] Amortization of Intangible Assets Stock Issued During Period, Shares, New Issues Amortization expense Amortization Amortization of Intangible Assets Change from net loss attributable to NCM, Inc. and transfers from noncontrolling interests Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Change Due to Net Income Attributable to Parent and Effects of Changes, Net Repayment of Senior Notes due 2022 and 2026 Proceeds from Issuance of Senior Long-term Debt Deferred tax assets, net Deferred Tax Assets, Net Operating Lease, Weighted Average Discount Rate, Percent Operating Lease, Weighted Average Discount Rate, Percent Shares excluded from the calculation of diluted weighted average shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Common Membership Units Returned Common Membership Units Returned Common membership units returned. Subsequent Events [Abstract] Subsequent Events [Abstract] Total deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance Restricted Cash and Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Term of increase in payment percentage per theater patron Period Of Increase In Payment On Theater Patron Period of increase in payment on per theater patron. Cumulative Principal Amount Paid on Term Loan Cumulative Principal Amount Paid on Term Loan Cumulative Principal Amount Paid on Term Loan Computer hardware and software Computer Hardware And Software [Member] Computer hardware and software. Equity Award [Domain] Award Type [Domain] Local Phone Number Local Phone Number Liabilities recorded for related party obligations Guarantor Obligations, Current Carrying Value Options, Exercisable (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number Deferred tax assets, tax basis notes receivable Deferred Tax Assets Notes Receivable Deferred tax assets notes receivable. Founding Members Founding Members [Member] Founding Members Advertising Inventory Advertising Inventory [Member] Advertising inventory. New Accounting Pronouncements or Change in Accounting Principle [Line Items] New Accounting Pronouncements or Change in Accounting Principle [Line Items] Preferred stock, $0.01 par value; 10,000,000 shares authorized, none issued and outstanding, respectively Preferred Stock, Value, Issued Additions Finite-lived Intangible Assets Acquired Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Retained Earnings (Distribution in Excess of Earnings) Retained Earnings Retained Earnings [Member] Debt Instrument Debt Instrument, Fair Value Disclosure Trade accounts Trade Accounts Receivable [Member] Payments for (Proceeds from) Policy Loans Payments for (Proceeds from) Policy Loans NCM LLC income taxes Income Tax Reconciliation Income Tax Benefit Of Affiliate Income Tax Reconciliation Income tax Benefit of Affiliate One Founding Members [Member] One Founding Members [Member] One founding members. Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] RelatedPartyTRAPayment,AMC RelatedPartyTRAPayment,AMC RelatedPartyTRAPayment,AMC Gross unrealized losses related to individual securities had been in continuous loss position for 12 months or longer Available-for-sale Securities, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss Receivables, net Increase (Decrease) in Accounts Receivable Dividends payable, date of record Dividends Payable, Date of Record Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Vested shares withheld to cover tax obligations Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation Weighted-average interest rate Debt, Weighted Average Interest Rate Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Tax Period [Domain] Tax Period [Domain] Share-based Compensation Arrangement by Share-based Payment Award, Compensation Cost [Line Items] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Basic (in usd per share) (Loss) Earnings per NCM, Inc. share, basic Earnings Per Share, Basic Cumulative Effect Adjustment for Adoption of ASU 2016-13 Cumulative Effect Adjustment for Adoption of ASU 2016-13 Cumulative Effect Adjustment for Adoption of ASU 2016-13 Net cash (used in) provided by investing activities Net Cash Provided by (Used in) Investing Activities, Continuing Operations Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Document Information [Line Items] Document Information [Line Items] Costs and Other Reimbursement Costs and Other Reimbursement Costs and Other Reimbursement Cash dividends on shares of NMC Inc Investment Income, Dividend AccAmort,InangibleAsset,Affiliates AccAmort,InangibleAsset,Affiliates,Disposals AccAmort,InangibleAsset,Affiliates,Disposals Number of restricted shares and restricted stock units, Non-vested, beginning balance (in shares) Number of restricted shares and restricted stock units, Non-vested, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number 2019 Long-Term Debt, Maturity, Year One Percentage of cash savings related to taxes Percentage Of Cash Savings Related To Taxes Percentage of cash savings related to taxes. Expense for early lease termination fee Gain (Loss) on Termination of Lease Interest on borrowings Interest Expense, Debt Fair Value Measurement Fair Value Measurement [Domain] Interest Expense, Other Deferred Tax Asset, Interest Carryforward Valuation and Qualifying Accounts SEC Schedule, 12-09, Schedule of Valuation and Qualifying Accounts Disclosure [Text Block] Commercial Paper Commercial Paper [Member] Other Other Noncash Income (Expense) DebtInstrumentBasisSpreadOnVariableRateIncrease DebtInstrumentBasisSpreadOnVariableRateIncrease DebtInstrumentBasisSpreadOnVariableRateIncrease Schedule of Mandatory Distributions to Members Distributions Made to Limited Liability Company (LLC) Member, by Distribution [Table Text Block] NCM, Inc. investment in NCM LLC Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent Cumulative Effect of New Accounting Principle in Period of Adoption Cumulative Effect Adjustment for Adoption of ASU 2014-09 Cumulative Effect Adjustment for Adoption of ASU 2014-09 Other Intangible Assets, Net Disposals of Intangible Assets, Net Disposals of Intangible Assets, Net Founding member advertising revenue from beverage concessionaire agreements Founding Member Advertising Revenue From Beverage Concessionaire Agreements [Member] Founding member advertising revenue from beverage concessionaire agreements. Number of customers contributing to more than 10% of revenue Number Of Customers Contributing To More Than Ten Percent Of Revenue Number of customers contributing to more than 10% of revenue. Tax Year 2017 Tax Year 2018 [Member] Prior to August 15, 2021 [Member] Debt Instrument, Redemption, Period Two [Member] Entity Voluntary Filers Entity Voluntary Filers Proceeds from Issuance of Secured Debt Proceeds from Issuance of Secured Debt Fair value of awards vested Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested in Period, Fair Value Plan Name Plan Name [Axis] Long-term Debt Total Long-term Debt Increase (decrease) in dividend equivalent accrual not requiring cash in the period Increase Decrease In Dividends Not Requiring Cash Increase decrease in dividends not requiring cash. Quoted Prices in Active Markets for Identical Assets (Level 1) [Member] Fair Value, Inputs, Level 1 [Member] Related Party Transaction, Description of Transaction Related Party Transaction, Description of Transaction Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] State and local income taxes, net of federal benefit Effective Income Tax Rate Reconciliation, State and Local Income Taxes, Amount Entity Small Business Entity Small Business Base Rate [Member] Base Rate [Member] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Scenario [Axis] Scenario [Axis] Uncollectible Receivables [Member] Uncollectible Receivables [Member] Decrease in ending balance of APIC Additional Paid in Capital On or After April 15, 2017 [Member] Debt Instrument Redemption Period Six [Member] Debt instrument redemption period six. LIABILITIES AND EQUITY/(DEFICIT) Liabilities and Equity [Abstract] Unrecognized tax benefits Unrecognized Tax Benefits that Would Impact Effective Tax Rate SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Table] Schedule of Valuation and Qualifying Accounts Schedule Of Valuation And Qualifying Accounts Table [Text Block] Schedule of Valuation And Qualifying Accounts [Table Text Block] NetworkAffiliateTransactionsRelatedParty NetworkAffiliateTransactionsRelatedParty NetworkAffiliateTransactionsRelatedParty Entity Interactive Data Current Entity Interactive Data Current Thereafter Long-Term Debt, Maturity, after Year Five 2021 Finite-Lived Intangible Asset, Expected Amortization, Year Four Number of restricted stock and restricted stock units expected to vest, after consideration of expected forfeitures of shares Share Based Compensation Arrangement By Share Based Payment Award Other Than Options Expected To Vest After Consideration Of Expected Forfeitures Outstanding Number Share based compensation arrangement by share based payment award other than options expected to vest after consideration of expected forfeitures outstanding number. Theater access fees and revenue share, net of beverage revenues    and other encumbered theater payments Theater Access Fees Net Of Beverage Revenues And Other Encumbered Theaters Payments Theater access fees net of beverage revenues and other encumbered theaters payments. Income tax receivable Income Taxes Receivable, Current Memorandum Of Understanding To Effectuate Aspects Of Final Judgment Memorandum Of Understanding To Effectuate Aspects Of Final Judgment [Member] Memorandum of understanding to effectuate aspects of Final Judgment. us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 us-gaap_DebtInstrumentBasisSpreadOnVariableRate1 Membership units exchangeable into common stock ratio Membership Units Conversion Ratio Membership units conversion ratio. Balance at beginning of period Balance at end of period Unrecognized Tax Benefits Gain on reduction of payable to founding members under tax receivable agreement Gain Loss On Reduction Of Payable To Founding Members Under Tax Receivable Agreement Gain (loss) on reduction of payable to founding members under tax receivable agreement. Total gross deferred tax assets Deferred Tax Assets, Gross Change in deferred tax asset related to Tax Cuts and Jobs Act Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Tax Cuts And Jobs Act Of 2017, Change In Tax Rate, Deferred Tax Asset, Income Tax Expense (Benefit) Income Tax Authority Income Tax Authority [Domain] Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Sale of membership units (in shares) Sale Of Membership Units, Number Of Shares Sold Sale Of Membership Units, Number Of Shares Sold Entity Address, State or Province Entity Address, State or Province Changes in Equity Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] Proceeds from Collection of Long-term Loans to Related Parties Proceeds from Collection of Long-term Loans to Related Parties CURRENT LIABILITIES: Liabilities, Current [Abstract] Accrued Rent, Current Accrued Rent, Current Receivable Receivable [Domain] Administrative and other costs General and Administrative Expense Nonrecurring Adjustment [Axis] Nonrecurring Adjustment [Axis] Weighted average exercise price, Exercisable (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price 2022 Revolving Credit Facility 2022 Revolving Credit Facility [Member] 2022 Revolving Credit Facility Deferred tax assets, net of valuation allowance of $223.8 and $212.0, respectively Long-term deferred tax assets, net of valuation allowance Deferred Tax Assets, Net of Valuation Allowance, Noncurrent Unrecognized tax benefits, payment of interest and penalties accrued Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued Accounting Policies [Abstract] Accounting Policies [Abstract] Weighted average remaining contractual life, Outstanding Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Debt issuance costs Debt Issuance Costs, Capitalized During Period Debt Issuance Costs, Capitalized During Period Operating Lease, Liability Operating Lease, Liability Current Federal Current Federal Tax Expense (Benefit) Document Transition Report Document Transition Report Common stock, $0.01 par value; 175,000,000 shares authorized, 80,626,889 and 78,040,818 issued and outstanding, respectively Common Stock, Value, Issued Issuance of shares to founding members Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests Weighted average remaining period over which unrecognized compensation costs will be recognized Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Weighted average grant-date fair value, Non-vested, beginning balance (in dollars per share) Weighted average grant-date fair value, Non-vested, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Customer Concentration Risk Customer Concentration Risk [Member] Options contractual term Share Based Compensation Arrangement By Share Based Payment Award Award Contractual Term Share Based Compensation Arrangement By Share Based Payment Award Award Contractual Term Cash dividends declared, per share Dividends Payable, Amount Per Share Estimated Fair Values of Company's Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] 2020 Operating Leases, Future Minimum Payments, Due in Three Years ICFR Auditor Attestation Flag ICFR Auditor Attestation Flag Maturity date Debt Instrument, Maturity Date Other Commitments [Table] Other Commitments [Table] Noncontrolling Interest, Increase from Subsidiary Equity Issuance Noncontrolling Interest, Increase from Subsidiary Equity Issuance Ownership [Axis] Ownership [Axis] Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Legal Entity [Axis] Legal Entity [Axis] Add: Dilutive effect of stock options, restricted stock, and exchangeable NCM LLC common membership units Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements Other Other Receivable [Member] Other receivable. Marketable Securities Marketable Securities, Policy [Policy Text Block] Class of Stock [Axis] Class of Stock Class of Stock [Axis] Common Membership Units Issued Common membership units issued (in shares) Common Membership Units Issued Common membership units issued. Percentage of increase in payment per digital screen and digital cinema equipment Percentage Of Increase In Payment Per Digital Screen And Digital Cinema Equipment Percentage of increase in payment per digital screen and digital cinema equipment. Promissory notes receivable from founding members Notes Receivable, Related Parties Payment terms Revenue, Performance Obligation, Payment Terms Revenue, Performance Obligation, Payment Terms Income Tax Authority Income Tax Authority [Axis] Regional Advertising Revenue [Member] Regional Advertising Revenue [Member] Regional Advertising Revenue [Member] Tax Year 2013 Tax Year 2013 [Member] Deferred Rent Credit, Noncurrent Deferred Rent Credit, Noncurrent Entity [Domain] Entity [Domain] Dividends declared per common share (in usd per share) Dividends per share Common Stock, Dividends, Per Share, Declared Accrued expenses Total accrued expenses Accrued Liabilities, Current Revenue (including revenue from related parties of $8.8 and $4.9, respectively) Revenue Revenue from Contract with Customer, Excluding Assessed Tax Noncancelable contract terms Noncancelable Contract Terms Noncancelable contract terms. Share-based compensation Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Share-based Compensation Cost Common Membership Unit Adjustment Received Common Membership Unit Adjustment Received Common Membership Unit Adjustment Received Cumulative Effect Adjustment for Adoption of ASU 2016-13 to Retained Earnings Cumulative Effect Adjustment for Adoption of ASU 2016-13 to Retained Earnings Cumulative Effect Adjustment for Adoption of ASU 2016-13 to Retained Earnings Aggregate percentage of theater access fee paid Percentage Of Theater Access Fee Paid Percentage of theater access fee paid. Stock Options [Member] Share-based Payment Arrangement, Option [Member] Unrecognized tax benefits including income tax accrued interest and penalties Unrecognized tax benefits including income tax accrued interest and penalties Unrecognized Tax Benefits Including Income Tax Penalties And Interest Accrued Unrecognized tax benefits including income tax penalties and interest accrued. Fair Value, Hierarchy Fair Value Hierarchy and NAV [Axis] Consolidation Items [Domain] Consolidation Items [Domain] Number of additional restricted stock issued under satisfying maximum performance criteria Number Of Additional Restricted Stock Issued Under Satisfying Maximum Performance Criteria Number of additional restricted stock issued under satisfying maximum performance criteria. Cinemark Cinemark Holdings Inc [Member] Cinemark holdings, Inc. AggregateRemainingofPrincipal,Notes2028 AggregateRemainingofPrincipal,Notes2028 AggregateRemainingofPrincipal,Notes2028 Variable Rate Variable Rate [Axis] Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units, Tax Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units, Tax Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units, Tax Percentage Of Customer Contributing To More Than Ten Percent Of Revenue Percentage Of Customers Contributing To More Than Ten Percent Of Revenue Percentage Of Customers Contributing To More Than Ten Percent Of Revenue ContentSegmentSeconds ContentSegmentSeconds ContentSegmentSeconds Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-sale [Line Items] Number of votes per common share Number Of Votes Per Common Share Number of votes per common share. Document Fiscal Year Focus Document Fiscal Year Focus Non-Operating Income [Member] Nonoperating Income (Expense) [Member] Property, Plant and Equipment [Abstract] Property, Plant and Equipment [Abstract] Variable Rate Variable Rate [Domain] Additional Paid in Capital (Deficit) Additional Paid In Capital (Deficit) Additional Paid-in Capital [Member] Short-term marketable securities Aggregate Fair Value - Short term marketable securities Available-for-sale Securities, Current Long-term Debt, Type Long-term Debt, Type [Domain] As Reported Previously Reported [Member] Debt Covenant Period [Domain] Debt Covenant Period [Domain] [Domain] for Debt Covenant Period [Axis] Share-based compensation Effective Income Tax Rate Reconciliation, Nondeductible Expense, Share-based Payment Arrangement, Amount Other non-operating expense Other Nonoperating Income (Expense) On-screen advertising time which founding members have right to purchase, in seconds Length Of On Screen Advertising Time Which Founding Members Have Right To Purchase Length of on-screen advertising time which founding members have a right to purchase Payment To Founding Members Under The Tax Receivable Agreement Payment To Founding Members Under The Tax Receivable Agreement Payment To Founding Members Under The Tax Receivable Agreement Valuation Allowance Reversed Valuation Allowance Reversed [Member] Valuation Allowance Reversed Maximum Maximum [Member] Disclosure of Compensation Related Costs, Share-based Payments [Abstract] Share-based Payment Arrangement [Abstract] Dividends payable, date declared Dividends Payable, Date Declared Schedule Of Accrued Expenses Schedule of Accrued Liabilities [Table Text Block] Long-term Marketable Securities [Member] Long Term Marketable Securities [Member] Long-term marketable securities. Award Type [Axis] Award Type [Axis] Total NCM, Inc. stockholders’ equity/(deficit) Stockholders' Equity Attributable to Parent Two Founding Members [Member] Two Founding Members [Member] Two founding members. Long-term marketable securities Aggregate Fair Value - Long term marketable securities Available-for-sale Securities, Noncurrent City Area Code City Area Code Financing Receivable, Allowance for Credit Loss [Table] Financing Receivable, Allowance for Credit Loss [Table] Accounts payable and accrued expenses Increase (Decrease) in Accounts Payable and Accrued Liabilities Reversal of accrued interest and penalties Reversal Of Accrued Interest And Penalties Reversal of accrued interest and penalties. 2007 Plan and 2016 Plan [Member] Two Thousand Seven Equity Incentive Plan And Two Thousand Sixteen Equity Incentive Plan [Member] Two thousand seven equity incentive plan and two thousand sixteen equity incentive plan. Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Repayments of term loan facility Repayments of term loan facility Repayments of Senior Debt Intangible Assets Intangible Assets Disclosure [Text Block] Local Advertising Revenue [Member] Local Advertising Revenue [Member] Local Advertising Revenue [Member] Estimated useful life Property, Plant and Equipment, Useful Life Total deferred income tax expense Deferred Income Tax Expense Benefit Gross Deferred income tax expense benefit gross. Operating Lease, Liability, Noncurrent Operating Lease, Liability, Noncurrent Adjustments for New Accounting Pronouncements [Axis] Accounting Standards Update [Axis] Debt Instrument, Net Total Leverage Ratio Debt Instrument, Net Total Leverage Ratio Debt Instrument, Net Total Leverage Ratio Debt instrument face amount Debt Instrument, Face Amount Total current income tax (benefit)/expense Current Income Tax Expense (Benefit) NON-CURRENT ASSETS: Assets, Noncurrent [Abstract] Schedule of Fiscal Year Ends Schedule Of Fiscal Year Ends Table [Text Block] Schedule of fiscal year ends. Income tax benefit from share-based compensation Share-based Payment Arrangement, Expense, Tax Benefit Number of theaters required to transfer advertising rights Number Of Theaters Required To Transfer Advertising Rights Number of theaters required to transfer advertising rights. Related Party Founding Members Related Party Founding Members [Member] Related Party Founding Members [Member[ Debt Covenant Period [Axis] Debt Covenant Period [Axis] Debt Covenant Period [Axis] Increase (decrease) in intangible assets, net Finite-Lived Intangible Assets, Period Increase (Decrease) Restricted Stock Units (RSUs) [Member] Restricted Stock Units (RSUs) [Member] Investment in AC JV, LLC Equity Method Investments Income Statement [Abstract] Income Statement [Abstract] Interest income Interest and Other Income Amortized Cost Basis Available-for-sale Securities, Amortized Cost Basis Accounting Policies [Table] Accounting Policies [Table] Accounting policies. Entity Registrant Name Entity Registrant Name Write-offs, net SEC Schedule, 12-09, Valuation Allowances and Reserves, Deduction Term loans - first tranche Term Loan [Member] Term loan. 2007 Plan [Member] Two Thousand Seven Equity Incentive Plan [Member] Two thousand seven equity incentive plan. Related Party Transaction [Axis] Related Party Transaction [Axis] Weighted average exercise price, Forfeited (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Forfeitures in Period, Weighted Average Exercise Price Other Effective Income Tax Rate Reconciliation, Other Adjustments, Amount Income tax expense Consolidated net income, tax Total income tax provision Income Tax Expense (Benefit) Receivables, net of allowance of $1.7 and $2.3, respectively Total Accounts Receivable, after Allowance for Credit Loss, Current Interest income from notes receivable (included in interest income) Interest Income, Related Party Entity Tax Identification Number Entity Tax Identification Number Investment Type Investment Type [Axis] Document Fiscal Period Focus Document Fiscal Period Focus Total current assets Assets, Current Accounts Receivable Accounts Receivable [Member] Number of restricted shares and restricted stock units, Forfeited (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeited in Period Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Change in the valuation allowance (1) Effective Income Tax Rate Reconciliation, Change in Deferred Tax Assets Valuation Allowance, Amount Share-Based Compensation Share-based Payment Arrangement [Policy Text Block] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract] Fair Value Measurements Fair Value Measurement, Policy [Policy Text Block] Less: current portion of debt Long-term Debt, Current Maturities Reduction in payable to founding members under the tax receivable agreement Reduction In Payable To Founding Members Under The Tax Receivable Agreement Reduction in payable to founding members under the tax receivable agreement. 2022 Operating Leases, Future Minimum Payments, Due in Five Years Property, Plant and Equipment, Type Long-Lived Tangible Asset [Domain] Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Common Membership Units [Member] Common Units [Member] Common units. Sales Revenue, Net Revenue Benchmark [Member] Weighted average grant date fair value of granted options Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Component [Domain] Equity Component [Domain] Financing Receivable, Allowance for Credit Loss [Line Items] Financing Receivable, Allowance for Credit Loss [Line Items] RelatedPartyTRAPayment,Cinemark RelatedPartyTRAPayment,Regal RelatedPartyTRAPayment,Cinemark RelatedPartyTRAPayment,Cinemark Schedule of Other Assets Schedule of Cost Method Investments [Table Text Block] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Schedule of Accounts, Notes, Loans and Financing Receivable [Table] Debt issuance costs Debt Issuance Costs, Gross Number of advertising agency groups contributing to more than 10% of outstanding gross receivable balance Number Of Advertising Agency Groups Contributing To More Than Ten Percent Of Outstanding Gross Receivables Number of advertising agency groups contributing to more than 10% Of outstanding gross receivables. Senior secured leverage ratio Senior Secured Leverage Ratio Senior secured leverage ratio. Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Debt Issuance Costs, Noncurrent, Net Debt Issuance Costs, Noncurrent, Net Short-term Debt, Type Short-term Debt, Type [Axis] 2016 Equity Incentive Plan [Member] 2016 Equity Incentive Plan [Member] 2016 Equity Incentive Plan Total Operating Leases, Future Minimum Payments Due Gain (loss) from equity transaction investment due to change in ownership interest in NCM LLC Gain Loss From Equity Transaction Due To Change In Ownership Interest Gain (loss) from equity transaction due to change in ownership interest. Schedule of Useful Lives Schedule Of Useful Lives Table [Text Block] Schedule of useful lives. (LOSS) INCOME BEFORE INCOME TAXES INCOME BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Significant Other Observable Inputs (Level 2) [Member] Fair Value, Inputs, Level 2 [Member] Type of Adoption [Domain] Accounting Standards Update [Domain] Unaudited Consolidated Financial Statements and Corresponding Footnotes for Prior Periods Adjusted from Amounts Previously Reported to Reflect Correction of Error Schedule of Error Corrections and Prior Period Adjustments [Table Text Block] AuditorLocation Auditor Location 2018 Operating Leases, Future Minimum Payments Due, Next Twelve Months Weighted average remaining life Finite-Lived Intangible Asset, Useful Life Investment in consolidated subsidiary NCM LLC Deferred tax assets recognized Deferred Tax Assets, Investment in Subsidiaries Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities, Continuing Operations Estimates Use of Estimates, Policy [Policy Text Block] Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Tax Year 2020 Tax Year 2020 [Member] Accrued distributions to founding members (including accrued payments due from related parties of $0.0 and $0.0, respectively) Noncash Distributions To Founding Members Noncash distributions to founding members. Title of 12(b) Security Title of 12(b) Security Income tax examination, year under examination Income Tax Examination, Year under Examination Income tax and other impacts of NCM LLC ownership changes Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Income Tax And Other Impacts Of Subsidiary Ownership Change Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Income Tax And Other Impacts Of Subsidiary Ownership Change Investment, Name Investment, Name [Domain] Change in Accounting Principle Revision of Prior Period, Adjustment [Member] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Other investments Total other investments Other Long-term Investments Cumulative Effect Adjustment for Adoption of ASU 2016-13 Cumulative Effect Adjustment for Adoption of ASU 2016-13, Net Cumulative Effect Adjustment for Adoption of ASU 2016-13, Net Document Type Document Type Product and Service [Domain] Product and Service [Domain] Interest Rate Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Less:  Net loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Performance obligations satisfied Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Share-based Compensation Arrangement by Share-based Payment Award [Line Items] Revolving credit facility Revolving Credit Facility [Member] Term Loan - Second Tranche, Discount Value Term Loan - Second Tranche, Discount Value Term Loan - Second Tranche, Discount Value Common membership units issued, net (in shares) Common Membership Units Issued Net Of Units Surrendered Common membership units issued net of units surrendered. Measurement Frequency Measurement Frequency [Axis] Consolidated Net Total Leverage Ratio Consolidated Net Total Leverage Ratio Consolidated Net Total Leverage Ratio Valuation Allowance On Deferred Tax Assets [Member] SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] State State and Local Jurisdiction [Member] Amounts due to founding members, net Due to Related Parties, Current Recently Adopted Accounting Pronouncements Recently Adopted Accounting Pronouncements Policy [Text Block] Recently adopted accounting pronouncements. Number Of Days Utilized Within Membership Unit Redemption Payment Calculation Number Of Days Utilized Within Membership Unit Redemption Payment Calculation Number of days utilized within membership unit redemption payment calculation. Subsequent Event Subsequent Events [Text Block] Unbilled contracts receivable Unbilled Contracts Receivable Troubled Debt Restructuring, Debtor, Subsequent Periods [Axis] Troubled Debt Restructuring, Debtor, Subsequent Periods [Axis] Accumulated Depreciation, Depletion and Amortization, Property, Plant and Equipment, Period Increase (Decrease) Property, Plant, and Equipment, Owned, Accumulated Depreciation Local advertising revenue Local And Regional Advertising Revenue [Member] Local and regional advertising revenue. Concentration of credit risk as a percentage of accounts receivable Concentration of credit risk as a percentage of accounts receivable Concentration of credit risk as a percentage of accounts receivable WEIGHTED AVERAGE SHARES OUTSTANDING: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Share-based compensation, vesting period Vesting period Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period Unrecognized tax benefits, income tax penalties and interest expense Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense Equity in earnings of non-consolidated entities Income (Loss) from Equity Method Investments Percentage of common membership units outstanding Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Fair Value Measurements Fair Value Disclosures [Text Block] Equipment, Computer Hardware And Software [Member] Equipment Computer Hardware And Software [Member] Equipment, computer hardware and software. Concentration Risk Type Concentration Risk Type [Axis] Schedule of Fair Value of Separate Accounts by Major Category of Investment [Line Items] Fair Value, Separate Account Investment [Line Items] 2020 Finite-Lived Intangible Asset, Expected Amortization, Year Three Proceeds from revolving credit facility Proceeds from Long-term Lines of Credit Cash dividends declared Dividends Payable Computer Software, Intangible Asset Computer Software, Intangible Asset [Member] Accounting Standards Update 2014-09 Accounting Standards Update 2014-09 [Member] Document Period End Date Document Period End Date Payments to Acquire Intangible Assets Purchase of intangible assets from affiliate Payments to Acquire Intangible Assets Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Schedule of Quarterly Financial Data Quarterly Financial Information [Table Text Block] Deferred State Deferred State and Local Income Tax Expense (Benefit) Loss on write-off of property, plant and equipment Tangible Asset Impairment Charges CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Operating loss carryforward, expiration date Operating Loss Carryforwards, Expiration Date Summary of Property and Equipment Property, Plant and Equipment [Table Text Block] Maturities Available For Sale Securities Maturity Available for sale securities maturity. Income Statement Location Income Statement Location [Domain] Purchase of subsidiary equity with NCM, Inc. equity Noncash or Part Noncash Acquisition, Investments Acquired Supplemental disclosure of non-cash financing and investing activity: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Amount Increase In Payment Per Theater Patron Amount Increase In Payment Per Theater Patron Amount Increase In Payment Per Theater Patron Beginning retained earnings, as of December 29, 2016 – as adjusted Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest, Adjusted Balance (Deprecated 2020-01-31) Redemption of Senior Notes due 2021 Repayments of Unsecured Debt Interest receivable on notes receivable (included in other current assets) Interest Receivable Property and equipment, net of accumulated depreciation of $59.9 and $77.7, respectively Net book value Total property and equipment Property, Plant and Equipment, Net Debt instrument issued percentage of face value Debt Instrument Issued Percentage Of Face Value Debt instrument issued percentage of face value. Estimated annual forfeiture rate, percentage Share Based Compensation Arrangement By Share Based Payment Award Estimated Annual Forfeiture Rate Share based compensation arrangement by share based payment award estimated annual forfeiture rate. Summary of Estimated Aggregate Amortization Expense Schedule of Finite-Lived Intangible Assets, Future Amortization Expense [Table Text Block] Accounting Period Fiscal Period, Policy [Policy Text Block] Integration payments Cost and other reimbursement Integration Payments Due From Related Parties Integration payments due from related parties. Proceeds from issuance of Senior Notes due 2028 Repayments of Long-term Debt NET LOSS PER NCM, INC. COMMON SHARE: Earnings Per Share [Abstract] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Repurchase Agreements and Similar Transactions, Maturity Periods [Axis] Property and equipment Property, Plant and Equipment, Gross Accounts Receivable, Allowance for Credit Loss Accounts Receivable, Allowance for Credit Loss Revenue Revenues Term Loan Margin Increase Term Loan Interest Rate Increase Following Amendment Term Loan Interest Rate Increase Following Amendment Terminating exclusion of performance-based compensation per employee per year limitation Tax Cuts And Jobs Act Of2017 Terminating Exclusion Of Performance Based Compensation Per Employee Per Year Limitation Tax cuts and jobs act of 2017 terminating exclusion of performance-based compensation per employee per year limitation. Other Commitments [Line Items] Other Commitments [Line Items] Weighted Average Exercise Price, Outstanding, beginning balance (in dollars per share) Weighted average exercise price, Outstanding, ending balance (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price Cumulative Effect Adjustment for Adoption of ASU 2016-13 to NCI Cumulative Effect Adjustment for Adoption of ASU 2016-13 to NCI Cumulative Effect Adjustment for Adoption of ASU 2016-13 to NCI Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Entity Current Reporting Status Entity Current Reporting Status Weighted Average Grant-Date Fair Value Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Change in accounting principle not related to a new ASU Change In Accounting Principle Not Related To A New Accounting Standards Update [Member] Change In Accounting Principle Not Related To A New Accounting Standards Update [Member] Amortization of Leased Asset Amortization of Leased Asset Receivables Accounts Receivable, before Allowance for Credit Loss, Current Interest rate on notes receivable Notes Receivable Stated Interest Rate Notes receivable stated interest rate. Amortization of debt issuance costs Amortization of debt issuance costs Amortization of Debt Issuance Costs NCM, Inc. investment in NCM LLC Adjustments To Additional Paid In Capital, Parent Investment In Subsidiary Adjustments To Additional Paid In Capital, Parent Investment In Subsidiary Deferred Tax Asset, Sale Of Membership Units Deferred Tax Asset, Sale Of Membership Units Deferred Tax Asset, Sale Of Membership Units Tax Credit Carryforward, Name [Domain] Tax Credit Carryforward, Name [Domain] Percentage increase (decrease) in theater attendance for Common Unit adjustment to occur Percentage Increase Decrease In Theater Attendance For Common Unit Adjustment To Occur Percentage change in theater attendance for Common Unit adjustment to occur. NCM, LLC. National Cine Media L L C [Member] National CineMedia, LLC. Prior to August 15, 2019 [Member] Debt Instrument, Redemption, Period One [Member] Valuation Allowance by Deferred Tax Asset [Axis] Valuation Allowance by Deferred Tax Asset [Axis] Leases [Abstract] Leases [Abstract] Income Taxes Income Tax, Policy [Policy Text Block] LIBOR [Member] London Interbank Offered Rate (LIBOR) [Member] Income Taxes [Line Items] Income Taxes [Line Items] Income Taxes [Line Items] Number of Customer Over Ten Percent of AR Balance Number of Customer Over Ten Percent of AR Balance Number of Customer Over Ten Percent of AR Balance Intangible Assets Goodwill and Intangible Assets, Intangible Assets, Policy [Policy Text Block] Founding Member Ownership in ACJV, LLC Ownership in ACJV, LLC Ownership in ACJV, LLC Entity Address, Postal Zip Code Entity Address, Postal Zip Code Founding Member Integration and Encumbered Payments due from Related Parties Founding Member Integration and Encumbered Payments due from Related Parties Founding Member Integration and Encumbered Payments due from Related Parties Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Disposal Group, Including Discontinued Operation, Intangible Assets Disposals of Intangible Assets, Gross Disposals of Intangible Assets, Gross Income Taxes Income Tax Disclosure [Text Block] Weighted Average Number of Shares Outstanding, Basic [Abstract] Weighted Average Number of Shares Outstanding, Basic [Abstract] Long-term Debt, Type Long-term Debt, Type [Axis] Related Party [Domain] Related Party [Domain] Summary of Option Award Activity Share-based Payment Arrangement, Option, Activity [Table Text Block] Basis spread on variable rate, percent Debt Instrument, Basis Spread on Variable Rate Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Class of Stock [Line Items] Class of Stock [Line Items] Credit Facility Credit Facility [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] change in deferred tax asset [Member] Change in Deferred Tax Asset [Member] Change in Deferred Tax Asset Entity Address, Address Line One Entity Address, Address Line One Cash paid for interest Interest Paid, Including Capitalized Interest, Operating and Investing Activities Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Less: Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Changes in Debt Issuance Costs Deferred Costs, Capitalized, Prepaid, and Other Assets Disclosure [Table Text Block] Debt issuance costs, net Debt Issuance Costs, Line of Credit Arrangements, Net Federal and State Domestic Tax Authority And State And Local Jurisdiction [Member] Domestic Tax Authority And State And Local Jurisdiction [Member] Available-for-sale Securities Aggregate Fair Value - Total marketable securities Available-for-sale Securities Short-term Marketable Securities [Member] Short Term Marketable Securities [Member] Short-term marketable securities. Administrative Cost General and Administrative Expense [Member] Consolidation Consolidation, Policy [Policy Text Block] Entity Shell Company Entity Shell Company Total current liabilities Liabilities, Current Repurchase of stock for restricted stock tax withholding Payment, Tax Withholding, Share-based Payment Arrangement Aggregate Principal Amount, Revolving loans Aggregate Principal Amount, Revolving loans Aggregate Principal Amount, Revolving loans Fair value of cost method investment Cost Method Investments, Fair Value Disclosure Financial Certificates Of Deposit Financial Certificates Of Deposit [Member] Financial certificates of deposit. Current Fiscal Year End Date Current Fiscal Year End Date Net cash (used in) provided by operating activities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities, Continuing Operations Percentage open of theaters in network Percentage of theaters open in network Percentage of theaters open in network Statement [Table] Statement [Table] Other Deferred Tax Assets, Other Purchase of an intangible asset with NCM LLC equity Noncash or Part Noncash Acquisition, Intangible Assets Acquired Unrecognized compensation expense related to non-vested options Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Debt Instrument, Redemption, Period Debt Instrument, Redemption, Period [Domain] Subtotal Property Plant And Equipment Net Before Construction In Progress Property Plant And Equipment Net Before Construction In Progress Incremental Term Loan Rate Incremental Term Loan Rate Incremental Term Loan Rate Range Range [Axis] Statistical Measurement [Axis] Troubled Debt Restructuring, Debtor, Subsequent Periods, Contingent Payments, Name [Domain] Troubled Debt Restructuring, Debtor, Subsequent Periods, Contingent Payments, Name [Domain] Subsequent Event [Member] Subsequent Event [Member] Intangible assets, net of accumulated amortization of $245.6 and $223.0, respectively Intangible assets, net of accumulated amortization Total intangible assets, net, beginning balance Total intangible assets, net, ending balance Finite-Lived Intangible Assets, Net Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Schedule of Amounts Due to Founding Members Schedule of Incentive Distributions Made to Managing Members or General Partners by Distribution [Table Text Block] Term of advertising services Term Of Advertising Services Term of advertising services. Scenario, Unspecified [Domain] Scenario [Domain] Adjustments to reconcile consolidated net loss to net cash provided by operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Subsequent Event Type Subsequent Event Type [Axis] Operating Lease, Cost Operating Lease, Cost Debt Instrument, Redemption, Period Debt Instrument, Redemption, Period [Axis] Related Party Transactions Related Party Transactions Disclosure [Text Block] Total lease expense Operating Leases, Rent Expense Agreement With Founding Members, Remaining Term Agreement With Founding Members, Remaining Term Agreement With Founding Members, Remaining Term Percent of compensation participants may contribute Defined Contribution Plan, Maximum Annual Contributions Per Employee, Percent Deferred income tax expense Deferred Income Tax Expense (Benefit) Barter Transaction Revenue Barter Transaction Revenue [Member] Barter Transaction Revenue [Member] Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Weighted average remaining contractual life, Vested and Expected to Vest Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Additional Tax Payments Additional Tax Payments Additional Tax Payments Proceeds from lessor on purchases of property, plant, and equipment Proceeds From Operating Leases Proceeds From Operating Leases U.S. federal statutory rate Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Fair Value Hierarchy Fair Value Hierarchy and NAV [Domain] NET LOSS ATTRIBUTABLE TO NCM, INC. Net loss attributable to NCM, Inc. (Loss) Net income attributable to NCM, Inc. Net Income (Loss) Attributable to Parent Additional paid in capital (deficit) Additional Paid In Capital And Accumulated Deficit Common Stock Additional paid in capital and accumulated deficit common stock. Payable to founding members under the TRA (related party payables of $11.9 and $23.7, respectively) Long-term payable to founding members under tax receivable agreement Payable To Founding Members Under Tax Sharing Agreement Noncurrent Payable to founding members under tax sharing agreement, noncurrent. Operating Lease, Right-of-Use Asset Operating Lease, Right-of-Use Asset Short Term Commercial Paper - Industrial Short Term Commercial Paper - Industrial [Member] Short Term Commercial Paper - Industrial Deferred Tax Assets, Operating Loss Carryforwards Net operating losses Deferred Tax Assets, Operating Loss Carryforwards Accrued payroll and related expenses Employee-related Liabilities, Current Income Statement Location Income Statement Location [Axis] Range Range [Domain] Statistical Measurement [Domain] Finite-Lived Intangible Assets, Accumulated Amortization Accumulated amortization, beginning balance Accumulated amortization, ending balance Finite-Lived Intangible Assets, Accumulated Amortization Short Term Commercial Paper - Financial Short Term Commercial Paper - Financial [Member] Short Term Commercial Paper - Financial Concentration of Credit Risk and Significant Customers Concentration Of Credit Risk And Significant Customers Policy [Text Block] Disclosure of accounting policy for concentration of credit risk and significant customers. Schedule of Annual Maturities on Credit Facility and Senior Notes Schedule of Maturities of Long-term Debt [Table Text Block] Increase in cost and equity method investments Increase (Decrease) In Cost And Equity Method Investments Increase (Decrease) In Cost And Equity Method Investments Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Term Loan - First Tranche Term Loan - First Tranche [Member] Term Loan - First Tranche Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Impairment of Intangible Assets (Excluding Goodwill) Impairment of Intangible Assets (Excluding Goodwill) Reversal of unrecognized tax benefits Reversal Of Unrecognized Tax Benefits Reversal of unrecognized tax benefits. Other assets Other Assets, Noncurrent Accrued purchases of property and equipment Noncash or Part Noncash Acquisition, Fixed Assets Acquired Platinum Spot Revenue Percentage Platinum Spot Revenue Percentage Platinum Sport Revenue Percentage Segments [Axis] Segments [Axis] Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate Retirement Benefits [Abstract] Retirement Benefits [Abstract] Entity File Number Entity File Number Debt instrument redemption price percentage Debt Instrument, Redemption Price, Percentage APIC, Share-based Payment Arrangement, Increase for Cost Recognition APIC, Share-based Payment Arrangement, Increase for Cost Recognition Network Costs Network Costs [Member] Network costs. Make-good reserve Accrued Reserves Accrued reserves. Short Term U.S. Agency Bonds Short Term U.S. Agency Bonds [Member] Short Term U.S. Agency Bonds SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Credit Concentration Risk Credit Concentration Risk [Member] Stock Issued Duing Period, Value, New Issues APIC Stock Issued Duing Period, Value, New Issues APIC Stock Issued Duing Period, Value, New Issues APIC Senior Unsecured Notes Due Two Zero Two Eight Senior Unsecured Notes Due Two Zero Two Eight [Member] Senior Unsecured Notes Due Two Zero Two Eight Consolidated Net Senior Secured Leverage Ratio Consolidated Net Senior Secured Leverage Ratio Consolidated Net Senior Secured Leverage Ratio Variable Lease, Cost Variable Lease, Cost Term Loan - Second Tranche, Loss on Debt Modification Term Loan - Second Tranche, Loss on Debt Modification Term Loan - Second Tranche, Loss on Debt Modification RedemptionAggregate,Notes2028 RedemptionAggregate,Notes2028 RedemptionAggregate,Notes2028 Weighted average grant-date fair value, Granted (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Unused line fee, percent Line of Credit Facility, Commitment Fee Percentage Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Municipal Bonds Municipal Bonds [Member] Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit) Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit) Vesting description Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Rights Credit Facility Credit Facility [Domain] OtherCFfromOperatingActivities OtherCFfromOperatingActivities OtherCFfromOperatingActivities ASSETS Assets [Abstract] Related Party Transactions [Abstract] Related Party Transactions [Abstract] 2021 Long-Term Debt, Maturity, Year Three Weighted average exercise price, Vested and Expected to Vest (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Weighted Average Remaining Contractual Life (in years) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest [Abstract] Stock Issued During Period, Value, New Issues, Consolidated Stock Issued During Period, Value, New Issues, Consolidated Stock Issued During Period, Value, New Issues, Consolidated Number of restricted shares and restricted stock units, Granted (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period Schedule of Fair Value of Separate Accounts by Major Category of Investment [Table] Fair Value, Separate Account Investment [Table] Long-lived Assets Property, Plant and Equipment, Policy [Policy Text Block] New Accounting Pronouncements or Change in Accounting Principle [Table] Accounting Standards Update and Change in Accounting Principle [Table] Options, Outstanding, beginning balance (in shares) Options, Outstanding, ending balance (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Number Debt Instrument Debt Instrument [Axis] Advertising Cost, Policy, Expensed Advertising Cost [Policy Text Block] Advertising Cost [Policy Text Block] Advertising operating costs Marketing and Advertising Expense NON-CURRENT LIABILITIES: Liabilities, Noncurrent [Abstract] Industrial Certificates Of Deposit Industrial Certificates Of Deposit [Member] Industrial certificates of deposit. Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Achievement of percentage in performance based restricted stock Achievement Of Percentage In Performance Based Restricted Stock Achievement of percentage in performance based restricted stock. Related Party [Axis] Related Party [Axis] Range of terms, in years Revenue Guarantee Period Revenue guarantee period. Schedule of Components of Deferred Tax Assets Schedule of Deferred Tax Assets and Liabilities [Table Text Block] Credit Facility Availability Compliance Credit Facility Availability Compliance Credit Facility Availability Compliance Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Capitalized share-based compensation expense Share-based Payment Arrangement, Amount Capitalized Net income attributable to NCM, Inc. following    conversion of dilutive membership units (in millions) Net Income (Loss) Attributable to Parent, Diluted Amounts Due to/from Founding Members Amounts Due To From Founding Members Policy [Text Block] Amounts due to from founding members. Remaining borrowing capacity of credit facility Line of Credit Facility, Remaining Borrowing Capacity Covenant During Waiver Max [Member] Covenant During Waiver Max [Member] Covenant During Waiver Max Tax Year 2016 Tax Year 2016 [Member] SEC Schedule, 12-09, Allowance, Credit Loss [Member] SEC Schedule, 12-09, Allowance, Credit Loss [Member] Valuation Allowances and Reserves Type SEC Schedule, 12-09, Valuation Allowances and Reserves Type [Axis] Operating Costs Operating Costs Policy [Text Block] Operating costs. Disaggregation of Revenue Disaggregation of Revenue [Table Text Block] 2023 Long-Term Debt, Maturity, Year Five Number of Restricted Shares and Restricted Stock Units Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Summary of Restricted Stock Awards and Restricted Stock Units Schedule of Nonvested Share Activity [Table Text Block] Common stock available for issuance Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized Weighted Average Term, ESA and Affiliate Weighted Average Term, ESA and Affiliate Weighted Average Term, ESA and Affiliate Accounts Receivable, Credit Loss Expense (Reversal) Accounts Receivable, Credit Loss Expense (Reversal) Incremental Term Loan Incremental Term Loan Incremental Term Loan Outstanding Balance Debt Instrument, carrying value Long-term Debt, Gross Adjustments To Additional Paid In Capital, Parent Investment In Subsidiary, net Adjustments To Additional Paid In Capital, Parent Investment In Subsidiary, net Adjustments To Additional Paid In Capital, Parent Investment In Subsidiary, net Total assets Assets, Fair Value Disclosure Network costs Network Costs Direct costs arising from transactions associated with network operations. These costs are categorized as cost of goods sold. Software And Development Costs Software And Development Costs [Member] Software and development costs. TOTAL LIABILITIES AND EQUITY/DEFICIT TOTAL LIABILITIES AND EQUITY/DEFICIT Liabilities and Equity Other accrued expenses Other Accrued Liabilities, Current Balance at beginning of year Balance at end of year Contract with Customer, Liability, Current 2021 Operating Leases, Future Minimum Payments, Due in Four Years Proceeds from sale and maturities of marketable securities Proceeds from Sale and Maturity of Debt Securities, Available-for-sale U.S. Government Agency Bonds US Government Agencies Debt Securities [Member] Recently Issued Accounting Pronouncements Recently Issued Accounting Pronouncements Policy [Text Block] Recently issued accounting pronouncements. Purchases of marketable securities Payments to Acquire Available-for-sale Securities Common membership units surrendered due to required theater transfer, value Value Of Common Membership Units Surrendered For Transferred Theaters Value of common membership units surrendered for transferred theaters. Unvested Stock Options [Member] Unvested Stock Options [Member] Unvested stock options. Long Term Certificates of Deposit [Member] Long Term Certificates of Deposit [Member] Long Term Certificates of Deposit Short-term Debt, Type Short-term Debt, Type [Domain] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Earnings Per Share Earnings Per Share [Text Block] OPERATING EXPENSES: Operating Expenses [Abstract] Ownership percentage Equity Method Investment, Ownership Percentage Minimum Minimum [Member] Nonrecurring Adjustment [Domain] Nonrecurring Adjustment [Domain] Payments to affiliates for tax sharing agreement Payments To Affiliates For Tax Sharing Agreement Payments to affiliates for tax sharing agreement. 2019 Operating Leases, Future Minimum Payments, Due in Two Years Deferred financing costs Beginning balance Ending balance Less: Debt issuance costs and discounts related to term loans and senior notes Debt Issuance Costs, Net Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized Change of Control Change Of Control [Member] Change of control. Payable to founding members under the TRA (related party payables of $0.0 and $0.6, respectively) Current payable to founding members under tax receivable agreement Payable To Founding Members Under Tax Sharing Agreement Current Payable to founding members under tax sharing agreement, current. Credit Agreement Third Amendment Credit Agreement Third Amendment [Member] Credit Agreement Third Amendment Executive compensation Effective Income Tax Rate Reconciliation, Executive Compensation, Amount Effective Income Tax Rate Reconciliation, Executive Compensation, Amount 2022 Long-Term Debt, Maturity, Year Four Issuance of shares, value Stock Issued During Period, Value, New Issues Revenue Recognition Revenue [Policy Text Block] Borrowings Debt Disclosure [Text Block] Schedule of Components of Income Tax Expense Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Share-Based Compensation Share-based Payment Arrangement [Text Block] Payment of dividends Payments of Ordinary Dividends, Common Stock Tax Year 2015 Tax Year 2015 [Member] Issuance of shares, shares Stock Issued During Period, Shares, New Issues Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Total Total non-operating expenses Nonoperating Income (Expense) Schedule of Marketable Securities Available-for-sale Securities [Table Text Block] Available-for-sale Securities, Gross Unrealized Loss Gross unrealized losses related to individual securities Available-for-sale Securities, Gross Unrealized Loss Basis of Presentation Basis of Accounting, Policy [Policy Text Block] COMMITMENTS AND CONTINGENCIES (NOTE 13) Commitments and Contingencies Total non-current assets Assets, Noncurrent Subsequent Event [Table] Subsequent Event [Table] Cash payment due to founding members/managing member Distributions Payable Distributions Payable Distributions payable. NCM LLC NCM LLC [Member] NCM LLC Entity Emerging Growth Company Entity Emerging Growth Company Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Repurchase Agreements and Similar Transactions, Maturity Periods [Domain] Accounts Receivable, Allowance for Credit Loss, Current Less: Allowance for doubtful accounts Accounts Receivable, Allowance for Credit Loss, Current Senior Unsecured Notes Due Two Zero Two Eight [Domain] Senior Unsecured Notes Due Two Zero Two Eight [Domain] Senior Unsecured Notes Due Two Zero Two Eight [Domain] Income tax payable Accrued Income Taxes, Noncurrent Restricted Stock [Member] Restricted Stock [Member] Payment of debt issuance costs Payments of Debt Issuance Costs Auditor Name Auditor Name Amounts due from founding members, net Due from Related Parties, Current Total Operating expenses Costs and Expenses Integration and other encumbered theater payments Finite Lived Intangible Assets Integration And Other Encumbered Theater Payments During Period Finite lived intangible assets integration and other encumbered theater payments during period. Measurement period Share Based Compensation Measurement Period Share Based Compensation Measurement Period Cost-method ownership percentage Cost Method Investment Ownership Percentage Cost method investment ownership percentage. 2020 Omnibus Plan 2020 Omnibus Incentive Plan [Member] 2020 Omnibus Incentive Plan Net senior secured leverage ratio Debt Instrument, Dividend Restriction, Net Senior Secured Leverage Ratio Debt Instrument, Dividend Restriction, Net Senior Secured Leverage Ratio Schedule of Available-for-sale Securities [Table] Schedule of Available-for-sale Securities [Table] Net total leverage ratio, covenant Debt Instrument, Covenant, Net Total Leverage Ratio Debt Instrument, Covenant, Net Total Leverage Ratio Document Information [Table] Document Information [Table] Carrying Value [Member] Reported Value Measurement [Member] Credit Agreement EBITDA Limit Credit Agreement EBITDA Limit Credit Agreement EBITDA Limit Debt instrument, frequency of periodic payment Debt Instrument, Frequency of Periodic Payment NCM LLC membership unit issuance to NCM, Inc. Income Tax Reconciliation Issuance Of Affiliate Membership Unit Income tax reconciliation issuance of affiliate membership unit. Common Stock [Member] Common Stock Common Stock [Member] Restricted Stock and Restricted Stock Units Restricted Stock And Restricted Stock Units [Member] Restricted stock and restricted stock units. OPERATING LOSS Operating Income (Loss) Discretionary contributions Defined Contribution Plan, Employer Discretionary Contribution Amount Network Affiliates Network Affiliates [Member] Network affiliates. Operating Lease, Liability, Current Short-term Lease Commitment, Amount Operating Lease, Liability, Current Basis of Presentation and Summary of Significant Accounting Policies Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] 2019 Finite-Lived Intangible Asset, Expected Amortization, Year Two Net reduction to additional paid in capital Adjustment To Additional Paid In Capital Due To Deferred Tax Asset Liability Adjustment to additional paid in capital due to deferred tax asset liability. Non-cash share-based compensation Share-based Payment Arrangement, Noncash Expense Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Depreciation expense Depreciation Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Available-for-sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Term Loan - Second Tranche Term Loan - Second Tranche [Member] Term Loan - Second Tranche Asset Impairment Charges Asset Impairment Charges Stock Options And Non-Vested Restricted Stock [Member] Stock Options And Non Vested Restricted Stock [Member] Stock options and non-vested restricted stock. Current year change to enacted federal and state rate Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Amount Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Granted Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Other Liabilities, Current Other Liabilities, Current Total liabilities Total liabilities Liabilities 2018 Finite-Lived Intangible Asset, Expected Amortization, Year One Options, Expired (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Expirations in Period Vesting percentage for year Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Rights Percentage Per Year Share based compensation arrangement by share based payment award award vesting rights percentage per year. Consolidation Items [Axis] Consolidation Items [Axis] Debt instrument redemption description Debt Instrument, Redemption, Description Net operating loss carryforwards Operating Loss Carryforwards Common stock, shares issued (in shares) Common Stock, Shares, Issued Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Cumulative effect for change in accounting principle Cumulative Effect of New Accounting Principle in Period of Adoption (Deprecated 2020-01-31) Cash distributions declared to members Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared Entity Address, City or Town Entity Address, City or Town Loss on early retirement of debt, net Gain (Loss) on Extinguishment of Debt Thereafter Operating Leases, Future Minimum Payments, Due Thereafter Repurchase amount Debt Instrument, Repurchase Amount Schedule of Reconciliation of Unrecognized Tax Benefits, Excluding Interest and Penalties Schedule of Unrecognized Tax Benefits Roll Forward [Table Text Block] On-screen advertising time purchased, in seconds Length Of On Screen Advertising Time Which Founding Members Purchased Length of on screen advertising time which founding members purchased. Common membership units surrendered to compensate for lost operating income (in shares) Common Membership Units Surrendered To Compensate For Lost Operating Income For Transferred Theaters Common membership units surrendered to compensate for lost operating income for transferred theaters. Proceeds from restricted cash Proceeds From Restricted Stock Proceeds From Restricted Stock Fair Value, Measurement Frequency Measurement Frequency [Domain] Accounting Standards Update 2016-02 [Member] Accounting Standards Update 2016-02 [Member] Short-term Certificates of Deposit Short-term Certificates of Deposit [Member] Short-term Certificates of Deposit Retained earnings (distributions in excess of earnings) Retained Earnings (Accumulated Deficit) TotalLeaseLiability TotalLeaseLiability TotalLeaseLiability Beverage Concessionaire Beverage Concessionaire [Member] Beverage concessionaire. Nonoperating gain (loss) related to debt issuance costs Nonoperating Gain (Loss) Related To Debt Issuance Costs Nonoperating Gain (Loss) Related To Debt Issuance Costs Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Entity Filer Category Entity Filer Category Amortization rate Debt Instrument, Amortization Rate Debt Instrument, Amortization Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Risk Free Interest Rate US Treasury Securities US Treasury Securities [Member] Senior Secured Notes Due Two Zero Two Eight [Member] [Domain] Senior Secured Notes Due Two Zero Two Eight [Member] [Domain] [Domain] for Senior Secured Notes Due Two Zero Two Eight [Member] [Axis] Fair Value [Member] Estimate of Fair Value Measurement [Member] 2019 ESA Amendment Year Extension 2019 ESA Amendment Year Extension 2019 ESA Amendment Year Extension Accretion of interest on the discounted payable to founding members under the TRA Accretion of interest on the discounted payable to founding members under the TRA Accretion Expense Proceeds from Stock Options Exercised Proceeds from Stock Options Exercised Finite-Lived Intangible Assets by Major Class Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Total equity/(deficit) Balance Balance Total equity/(deficit) Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Amendment Flag Amendment Flag American Multi Cinema Acquisition Of Carmike Cinemas Inc American Multi Cinema Acquisition Of Carmike Cinemas Inc [Member] American Multi Cinema acquisition of Carmike Cinemas Inc. Equity Components [Axis] Equity Components [Axis] Amendments to Credit Agreement [Axis] Amendments to Credit Agreement [Axis] Amendments to Credit Agreement Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Antidilutive Securities Antidilutive Securities [Axis] Selling and Marketing Costs Selling and Marketing Expense [Member] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Concentration Risk Type Concentration Risk Type [Domain] Long Term U.S. Agency Bonds Long Term U.S. Agency Bonds [Member] Long Term U.S. Agency Bonds OtherCFfromInvestingActivities OtherCFfromInvestingActivities OtherCFfromInvestingActivities Operating Lease, Lease Income, Lease Payments Operating Lease, Lease Income, Lease Payments Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures AMC and Cinemark American Multi Cinema Inc And Cinemark Holdings Inc [Member] American Multi-Cinema, Inc. and Cinemark Holdings, Inc. Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Deferred Federal Deferred Federal Income Tax Expense (Benefit) Weighted average exercise price, Expired (in dollars per share) Share-based Compensation Arrangements by Share-based Payment Award, Options, Expirations in Period, Weighted Average Exercise Price Reduction in Valuation Allowance from Investment in NCM LLC Deferred Tax Asset Reduction in Valuation Allowance from Investment in NCM LLC Deferred Tax Asset Reduction in Valuation Allowance from Investment in NCM LLC Deferred Tax Asset Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Product and Service [Axis] Product and Service [Axis] Valuation allowance reversed Valuation Allowances And Reserves Charged And Reversed To Other Accounts Valuation allowances and reserves charged and reversed to other accounts. National and regional advertising revenue National Advertising Revenue [Member] National advertising revenue. Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Entity Public Float Entity Public Float Deferred Tax Assets, Valuation Allowance, Net Deferred Tax Assets, Valuation Allowance, Net Deferred Tax Assets, Valuation Allowance, Net Short-term Lease, Cost Short-term Lease, Cost Share-based compensation issued, shares Shares Issued, Shares, Share-based Payment Arrangement, after Forfeiture On or After August 15, 2021 [Member] Debt Instrument, Redemption, Period Three [Member] Selling and marketing costs Selling and Marketing Expense Share-based compensation expense related to modification of certain former executive equity awards Share-based Payment Arrangement, Plan Modification, Incremental Cost Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend Statement [Line Items] Statement [Line Items] Valuation Allowances and Reserves SEC Schedule, 12-09, Valuation Allowances and Reserves [Domain] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Deferred revenue Increase (Decrease) in Contract with Customer, Liability Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] NCM LLC equity issued for purchase of intangible asset Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance Of Equity For Purchase Of Intangible Asset Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance Of Equity For Purchase Of Intangible Asset Share-based compensation issued, value Shares Issued, Value, Share-based Payment Arrangement, after Forfeiture Federal Domestic Tax Authority [Member] Debt Disclosure [Abstract] Debt Disclosure [Abstract] Tax Period [Axis] Tax Period [Axis] Senior Secured Financial Covenant Ratio Senior Secured Financial Covenant Ratio to Make Distributions Senior Secured Financial Covenant Leverage Ratio Property, Plant and Equipment, Type Long-Lived Tangible Asset [Axis] Deferred Tax Assets, Valuation Allowance Valuation allowance Deferred Tax Assets, Valuation Allowance Short Term Municipal Bonds Short Term Municipal Bonds [Member] Short Term Municipal Bonds Negative Distributions Made to Limited Liability Company Negative Distributions Made to Limited Liability Company Negative Distributions Made to Limited Liability Company Term Loan Second Tranche Term Loan Second Tranche Term Loan Second Tranche Employee Benefit Plans Retirement Benefits [Text Block] Write Off of Equipment Write Off of Equipment Write Off of Equipment Document Annual Report Document Annual Report Schedule of Share-Based Compensation Costs Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table Text Block] Gain on re-measurement of the payable to founding members under the TRA Gain on re-measurement of the payable to founding members under the TRA Gain (Loss) On Re Measurement Of Payable To Founding Members Under Tax Sharing Agreement Gain (loss) on re-measurement of payable to founding members under tax sharing agreement. Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Axis] Proceeds from sale of common stock Proceeds from Issuance of Common Stock TOTAL ASSETS TOTAL ASSETS Assets Plan Name Plan Name [Domain] Dividends payable, date to be paid Dividends Payable, Date to be Paid Income attributable to NCM, Inc. Income Tax Reconciliation Income Tax Expense Excluding Minority Interest Income Tax Reconciliation Income Tax Expense Excluding Minority Interest Research and development expense Research and Development Expense Noncontrolling Interest Noncontrolling Interest [Member] Depreciation expense Depreciation, Depletion and Amortization, Nonproduction Schedule of Receivables Schedule of Accounts, Notes, Loans and Financing Receivable [Table Text Block] Total non-current liabilities Liabilities, Noncurrent Tax Year 2019 Tax Year 2019 [Member] Leasing Arrangement [Member] Leasing Arrangement [Member] Tax effect measurement extension period Tax Cuts And Jobs Act Of2017 Measurement Maximum Extension Period Tax cuts and jobs act of 2017 measurement maximum extension period. Short-term debt Short-term Debt Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Term Loan - Second Tranche, Debt Issuance Costs Term Loan - Second Tranche, Debt Issuance Costs Term Loan - Second Tranche, Debt Issuance Costs Schedule of Outstanding Debt Schedule of Debt [Table Text Block] Fair Value Measurements, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Subsequent Events [Line Items] Subsequent Event [Line Items] Common membership units outstanding Units of Partnership Interest, Amount Tax Credit Carryforward [Axis] Tax Credit Carryforward [Axis] Basic (in shares) Weighted Average Number of Shares Outstanding, Basic Diluted (in usd per share) (Loss) Earnings per NCM, Inc. share, diluted Earnings Per Share, Diluted Segments [Domain] Segments [Domain] Repayments of revolving credit facility Repayments of Long-term Lines of Credit Cash paid for income taxes, net of refunds Income Taxes Paid, Net Related Party Costs Theater access fee Related Party Costs Outstanding Credit Facility Waiver Limit Outstanding Credit Facility Waiver Limit Outstanding Credit Facility Waiver Limit COMPREHENSIVE LOSS ATTRIBUTABLE TO NCM, INC. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Quarterly Financial Data Quarterly Financial Information [Text Block] Income Taxes [Table] Income Taxes [Table] Income Taxes [Table] OTHER COMPREHENSIVE INCOME, NET OF TAX: Other Comprehensive Income (Loss), Net of Tax [Abstract] Debt Issuance Costs Debt, Policy [Policy Text Block] Schedule of Reconciliation of Provision for Income Taxes Schedule of Effective Income Tax Rate Reconciliation [Table Text Block] Tax Year 2016 Tax Year 2017 Tax Year 2017 [Member] Accounts payable Accounts Payable, Current Fair Values of the Company's Assets Fair Value, Assets Measured on Recurring Basis [Table Text Block] Capitalized Implementation Costs Depreciation Capitalized Implementation Costs Depreciation Capitalized Implementation Costs Depreciation Increase in Income Tax Expense caused by Valuation Allowance Increase in Income Tax Expense due to Increase in Valuation Allowance Increase in Income Tax Expense due to Increase in Valuation Allowance Common stock, shares outstanding (in shares) Balance, (in shares) Balance, (in shares) Common Stock, Shares, Outstanding AMC American Multi Cinema Inc [Member] American Multi-Cinema, Inc. Advertising operating costs Costs of goods and services sold Cost of Goods and Services Sold Retained Earnings RAAP Adjustment 2016-13 [Member] Retained Earnings RAAP Adjustment 2016-13 [Member] Retained Earnings RAAP Adjustment 2016-13 Covenant During Waiver Min [Member] Covenant During Waiver Min [Member] Covenant During Waiver Min Accounting Policies [Line Items] Accounting Policies [Line Items] Accounting policies. Retained Earnings Adjustment 2016-13 [Member] Retained Earnings Adjustment 2016-13 [Member] Retained Earnings Adjustment 2016-13 Entity Central Index Key Entity Central Index Key Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Lease, Cost Lease, Cost Reduction in net deferred tax asset Tax Cuts And Jobs Act Change In Tax Rate Reduction Of Net Deferred Tax Assets Tax cuts and jobs act, change in tax rate, reduction of net deferred tax assets, NCM, Inc. Stockholders’ Equity/(Deficit): Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Credit Agreement Second Amendment Credit Agreement Second Amendment [Member] Credit Agreement Second Amendment Senior secured notes due 2028 Senior Unsecured Notes Due Two Zero Two Six [Member] Senior unsecured notes due two zero two six. RelatedPartyTRAPayment,Regal RelatedPartyTRAPayment,Regal RelatedPartyTRAPayment,Regal Property and Equipment Property, Plant and Equipment Disclosure [Text Block] Other liabilities Other Liabilities, Noncurrent Number of NCM LLC common units converted to NCM Inc.common stock Number Of Common Units Converted To Common Stock Number of common units converted to common stock. Schedule of Employee Service Share-based Compensation, Allocation of Recognized Period Costs [Table] Share-based Payment Arrangement, Expensed and Capitalized, Amount [Table] Debt Instrument [Line Items] Debt Instrument [Line Items] Trading Symbol Trading Symbol ImputedInterestFutureLeasePayments ImputedInterestFutureLeasePayments ImputedInterestFutureLeasePayments Finite-Lived Intangible Assets, Costs Incured to Renew o Extend, Gross Capitalized Implementation Costs Capitalized Implementation Costs Non-cash gain on re-measurement of the payable to founding members under the TRA Non Cash Gain Loss On Re Measurement Of Payable To Founding Members Under Tax Sharing Agreement Non-cash gain (loss) on re-measurement of payable to founding members under tax sharing agreement. Accrued Expenses Accounts Payable and Accrued Liabilities Disclosure [Text Block] Related Party Transaction [Domain] Related Party Transaction [Domain] Schedule of Minimum Lease Payments Under Noncancelable Operating Leases Schedule of Future Minimum Rental Payments for Operating Leases [Table Text Block] Other investments Cost Method Investments Common membership units surrendered (n shares) Common Membership Units Surrendered Due To Transferred Theaters Common membership units surrendered due to transferred theaters. Equipment Equipment [Member] Options, Vested and Expected to Vest (in shares) Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Cash distributions from non-consolidated entities Cash distributions received from non-consolidated entities Cash Distributions From Non Consolidated Entities Cash distributions from non-consolidated entities. Capital Loss Carryforward Capital Loss Carryforward [Member] Long-term debt, net of debt issuance costs of $10.5 and $8.0, respectively Carrying value of long-term debt Long-term Debt, Excluding Current Maturities Recognized share-based compensation expense Total share-based compensation costs Share-based Payment Arrangement, Expense Weighted average remaining contractual life, Exercisable Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Research And Experimentation Tax Credit Carryforward Research Tax Credit Carryforward [Member] Consolidated net (loss) income Net Income (Loss), Including Portion Attributable to Noncontrolling Interest Investments Investments [Domain] Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Senior secured credit facility. Payables and Accruals [Abstract] Payables and Accruals [Abstract] Cash and cash equivalents at beginning of period Cash and cash equivalents at end of period Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents Common stock, shares sold (in shares) Sale of Stock, Number of Shares Issued in Transaction Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Maximum potential payment Guarantor Obligations, Maximum Exposure, Undiscounted Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] CURRENT ASSETS: Assets, Current [Abstract] Gross carrying amount, beginning balance Gross carrying amount, ending balance Finite-Lived Intangible Assets, Gross Senior Notes Due Two Zero Two Two [Member] Senior Notes Due Two Zero Two Two [Member] Senior notes due two zero two two. Impairment on investment Impairment of investment Cost-method Investments, Other than Temporary Impairment Summary of Intangible Asset's Activity Schedule of Finite-Lived Intangible Assets [Table Text Block] Deferred revenue Deferred Revenue, Current Percentage of increase in payment per theatre patron Percentage Of Increase In Payment Per Theater Patron Percentage of increase in payment per theater patron. Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure Blended state and federal tax rate Effective Income Tax Rate Reconciliation Blended State And Federal Income Taxes Effective income tax rate reconciliation blended state and federal income taxes. Fair Value, Measurements, Recurring [Member] Fair Value, Recurring [Member] Accrued interest Interest Payable, Current Equity Stockholders' Equity Note Disclosure [Text Block] Accounts Receivable, Allowance for Credit Loss, Writeoff Accounts Receivable, Allowance for Credit Loss, Writeoff Reductions based on the lapse of applicable statute of limitations Unrecognized Tax Benefits, Reduction Resulting from Lapse of Applicable Statute of Limitations Measurement Basis Measurement Basis [Axis] 2022 Finite-Lived Intangible Asset, Expected Amortization, Year Five NON-OPERATING EXPENSES: Nonoperating Income (Expense) [Abstract] AuditorFirmID Auditor Firm ID Common membership units surrendered due to required theater transfer (in shares) Common Membership Units Surrendered Due To Required Theater Transfer Common membership units surrendered due to required theater transfer. Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Weighted average grant-date fair value, Vested (in dollars per share) Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Term Loan - Second Tranche, Net Term Loan - Second Tranche, Net Term Loan - Second Tranche, Net Class of Stock [Domain] Class of Stock Class of Stock [Domain] Acquisition of a business Payments to Acquire Businesses, Gross Reduction to Deferred Tax Asset Reduction to Payable to Founding Members Reduction to Payable to Founding Members Founding member integration payments and other encumbered theater payments Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates Payments received from related parties for their acquired theatres that are subject to an existing on-screen advertising contract. Borrowing amount of credit facility Line of Credit Facility, Maximum Borrowing Capacity Ownership [Domain] Ownership [Domain] Accounts Payable Accounts Payable Debt Instrument, Name Debt Instrument, Name [Domain] NCM Inc. [Member] National Cine Media Inc [Member] National CineMedia, Inc. Prepaid expenses and other current assets Other Assets, Current Accrued bonus Deferred Tax Assets, Tax Deferred Expense, Compensation and Benefits, Employee Bonuses Amounts due to founding members, net Increase (Decrease) in Due to Related Parties, Current Adjustments to Additional Paid in Capital, Other Decrease within activity of APIC Adjustments to Additional Paid in Capital, Other Income before income taxes Effective Income Tax Rate Reconciliation at Federal Statutory Income Tax Rate, Amount Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Distributions to founding members Payments of Distributions to Affiliates Reduction in deferred tax assets Decrease In Deferred Tax Assets Decrease in deferred tax assets. Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Equity-Based Arrangements, Individual Contracts, Type of Deferred Compensation [Domain] Balance at beginning of period Balance at end of period SEC Schedule, 12-09, Valuation Allowances and Reserves, Amount Construction in progress Construction in Progress, Gross CONSOLIDATED NET LOSS Consolidated net loss Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Write-off of debt issuance costs Write off of Deferred Debt Issuance Cost Write off of Deferred Debt Issuance Cost Dividend payments during period upon vesting of stock units Dividend Payments During Period Upon Vesting Of Stock Units Dividend payments during period upon vesting of stock units. Theater access fees and revenue share to founding members (including fees to related parties of $34.3 and $16.0, respectively) Theater Access Fees and revenue share Theater Access Fees and revenue share Accrued integration and other encumbered theater payments from founding members (including accrued payments due from related parties of $0.0 and $0.0, respectively) Accrued Integration And Other Encumbered Theater Payments Due From Founding Members Accrued Integration And Other Encumbered Theater Payments Due From Founding Members Accrued integration and other encumbered theater payments due from founding members. New contract liabilities Contract with Customer, Liability, New Contract Liabilities Contract with Customer, Liability, New Contract Liabilities Concentration Risk Benchmark Concentration Risk Benchmark [Axis] AC JV, LLC [Member] A C J V L L C [Member] AC JV, LLC. Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Uncertain tax positions (reversal) Effective Income Tax Rate Reconciliation, Tax Contingency, Amount Other, net Other Expenses Deferred Tax Asset [Domain] Deferred Tax Asset [Domain] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Accrued dividend Accrued Dividends Accrued dividends.