Purchase of an intangible asset with NCM LLC equity Noncash or Part Noncash Acquisition, Intangible Assets Acquired Revision of Prior Period [Axis] Revision of Prior Period [Axis] Related Party Transactions [Abstract] Related Party Transactions [Abstract] Accounts Receivable, Credit Loss Expense (Reversal) Accounts Receivable, Credit Loss Expense (Reversal) Payment To Founding Members Under Tax Sharing Arrangement Payments to affiliates for tax sharing agreement Payment To Founding Members Under Tax Sharing Arrangement Payment to founding members under tax sharing arrangement. Additional paid in capital/(deficit) Additional Paid In Capital And Accumulated Deficit Common Stock Additional paid in capital and accumulated deficit common stock. Deferred Income Tax Assets, Net Deferred Income Tax Assets, Net Outstanding borrowings Debt Instrument, carrying value Long-Term Debt, Gross Payable to founding members under tax receivable agreement (including payables to related parties of $15.5 and $11.9, 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. Entity Address, Postal Zip Code Entity Address, Postal Zip Code Investment Secondary Categorization [Axis] Investment Secondary Categorization [Axis] 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. Preferred stock, shares outstanding (in shares) Preferred Stock, Shares Outstanding Regal Entertainment Group [Member] Regal Regal Entertainment Group [Member] Regal entertainment group. Debt Instrument [Axis] Debt Instrument Debt Instrument [Axis] 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. Schedule of Allowance for Doubtful Accounts Financing Receivable, Current, Allowance for Credit Loss [Table Text Block] Payment of dividends Payments of Ordinary Dividends, Common Stock Income Tax Disclosure [Abstract] Income Tax Disclosure [Abstract] Borrowing amount of credit facility Line of Credit Facility, Maximum Borrowing Capacity Term loans - first tranche Term Loan -First Tranche [Member] Term loan. Debt Instrument Debt Instrument, Fair Value Disclosure Debt Instrument, Basis Spread on Variable Rate Debt Instrument, Basis Spread on Variable Rates Debt Instrument, Basis Spread on Variable Rates Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized Contract with Customer, Liability, Change in Timeframe, Performance Obligation Satisfied, Revenue Recognized Available-for-sale Securities, Gross Unrealized Loss Available-for-Sale Securities, Gross Unrealized Loss Platinum Spot Revenue Percentage Platinum Spot Revenue Percentage Platinum Sport Revenue Percentage CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided by (Used in) Investing Activities, Continuing Operations [Abstract] Financial Instruments [Domain] Financial Instruments [Domain] Fair Value Measurement [Domain] Fair Value Measurement [Domain] Guarantee Obligations Amount Paid Guarantee Obligations Amount Paid Guarantee obligations amount paid. Basis spread on variable rate, percent Debt Instrument, Basis Spread on Variable Rate Range Statistical Measurement [Domain] Make-good provision Accrued Reserves Accrued reserves. Proceeds from Issuance of Debt Proceeds from Issuance of Debt Covenant Waiver Max [Member] Covenant Waiver Max [Member] Covenant Waiver Max [Member] Short-term Debt, Type Short-Term Debt, Type [Axis] Weighted average discount rate Operating Lease, Weighted Average Discount Rate, Percent Interest Rate Stated interest rate Debt Instrument, Interest Rate, Stated Percentage Other Other Noncash Income (Expense) Consolidated Net Senior Secured Leverage Ratio Consolidated Net Senior Secured Leverage Ratio Consolidated Net Senior Secured Leverage Ratio Dividends payable Dividends Payable Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Table] NET LOSS ATTRIBUTABLE TO NCM, INC. Net loss attributable to NCM, Inc. Net loss attributable to NCM, Inc. (in millions) Net Income (Loss) Attributable to Parent Measurement Input Type [Domain] Measurement Input Type [Domain] Receivables from related parties, current Financing Receivable, after Allowance for Credit Loss, Current Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] Shares excluded from the calculation of diluted weighted average shares Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Document Information [Line Items] Document Information [Line Items] Subsequent Event Type Subsequent Event Type [Axis] Common membership units returned Common Membership Units Returned Common membership units returned. Distributions to founding members Payments of Distributions to Affiliates Payments of Distributions to Affiliates Senior secured leverage ratio Line of Credit, Covenant, Maximum Senior Secured Leverage Ratio Line of Credit, Covenant, Maximum Senior Secured Leverage Ratio Tax Period [Domain] Tax Period [Domain] Term Loan - Second Tranche Loss on Debt Modification Term Loan - Second Tranche Loss on Debt Modification Term Loan - Second Tranche Loss on Debt Modification Equity Component Equity Component [Domain] Fair Value, Nonrecurring [Member] Fair Value, Nonrecurring [Member] 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. Subsequent Event Type Subsequent Event Type [Domain] Scenario [Axis] Scenario [Axis] Total assets Assets, Fair Value Disclosure Ownership [Axis] Ownership [Axis] Debt Instrument, Restrictive Covenants Debt Instrument, Restrictive Covenants Investment, Name Investment, Name [Domain] Investment, Name [Domain] Related Party Related Party [Domain] Aggregate Fair Value - Total marketable securities Debt Securities, Available-for-Sale Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Total non-current liabilities Liabilities, Noncurrent Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Outstanding letters of credit Long-Term Line of Credit Entity Address, State or Province Entity Address, State or Province Quoted Prices in Active Markets for Identical Assets (Level 1) Fair Value, Inputs, Level 1 [Member] Intercompany Loan Amount [Axis] Intercompany Loan Amount [Axis] Intercompany Loan Amount One Founding Members One Founding Members [Member] One founding members. Industrial Commercial Paper Commercial Paper Industrial [Member] Commercial paper industrial. Fair Value, Separate Account Investment [Line Items] Fair Value, Separate Account Investment [Line Items] Investments by Secondary Categorization [Domain] Investments by Secondary Categorization [Domain] Net cash used in operating activities Net Cash Provided by (Used in) Operating Activities Short-Term U.S. Government Treasury Bonds US Government Treasury Debt Securities [Member] US Government Treasury Debt Securities [Member] Short-term lease liability Operating Lease, Liability, Current Impaired Investment Impaired Investment Impaired Investment Repayments of Debt, Maturing in More than Three Months Repayments of Debt, Maturing in More than Three Months Schedule of Marketable Securities Debt Securities, Available-for-Sale [Table Text Block] Range of terms, in years Revenue Guarantee Period Revenue guarantee period. Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Schedule of Antidilutive Securities Excluded from Computation of Earnings Per Share [Table] Line of Credit Facility, Asset Restrictions Credit Facility Availability Compliance Credit Facility Availability Compliance General Company Information [Table] General Company Information [Table] General company information. Legal Entity Legal Entity [Axis] Long-term debt, net of debt issuance costs of $9.2 and $10.5, respectively Carrying value of long-term debt Long-Term Debt, Excluding Current Maturities Certificates of Deposit Certificates of Deposit [Member] Related Party Costs Theater access fee Related Party Costs Covenant During Waiver Max Covenant During Waiver Max [Member] Covenant During Waiver Max Total liabilities Liabilities Weighted average remaining lease term Operating Lease, Weighted Average Remaining Lease Term Stock Issued During Period, Value, New Issues Stock Issued During Period, Value, New Issues Accrued distributions to founding members (including accrued distributions to related parties Accrued Integration And Other Encumbered Theater Payments Due To Founding Members, Financing Activities Accrued Integration And Other Encumbered Theater Payments Due To Founding Members, Financing Activities Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Fair Value Hierarchy Fair Value Hierarchy and NAV [Domain] Revolving credit facility 2018 Revolving Credit Facility [Member] Percentage of cash savings related to taxes Percentage Of Cash Savings Related To Taxes Percentage of cash savings related to taxes. Tax Year 2019 [Member] Tax Year 2019 [Member] Changes in Taxes and LLC Ownership Changes in Taxes and LLC Ownership Changes in Taxes and LLC Ownership Short-term marketable securities Aggregate Fair Value - Short term marketable securities Debt Securities, Available-for-Sale, Current Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Document Type Document Type Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member] Proceeds from Unsecured Lines of Credit Line of Credit Facility, Increase (Decrease), Net Borrowings Debt Disclosure [Text Block] Weighted average term, esa and affiliate (in years) Weighted Average Term, ESA and Affiliate Weighted Average Term, ESA and Affiliate Product and Service [Domain] Products and Services Product and Service [Domain] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided by (Used in) Operating Activities, Continuing Operations [Abstract] Entity Shell Company Entity Shell Company Deferred income tax benefit Deferred Income Tax Expense (Benefit) 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. Financial Instrument [Axis] Financial Instrument [Axis] Other Investments Other Investments Consolidated Net Total Leverage Ratio Covenant Consolidated Net Total Leverage Ratio Covenant Consolidated Net Total Leverage Ratio Covenant Loss on the Modification of Debt Loss on the Modification of Debt Loss on the Modification of Debt Subsequent Event Subsequent Event [Member] Summary of Changes in Deferred Revenue Contract with Customer, Contract Asset, Contract Liability, and Receivable [Table Text Block] Document Period End Date Document Period End Date Increase in dividend equivalent accrual not requiring cash in the period Increase Decrease In Dividends Not Requiring Cash Increase decrease in dividends not requiring cash. Schedule of Amounts Due to Founding Members, Net Schedule of Incentive Distributions Made to Managing Members or General Partners by Distribution [Table Text Block] Network costs Network Costs Direct costs arising from transactions associated with network operations. These costs are categorized as cost of goods sold. TOTAL ASSETS Assets Accounts Receivable, Allowance for Credit Loss, Writeoff Accounts Receivable, Allowance for Credit Loss, Writeoff Debt Disclosure [Abstract] Debt Disclosure [Abstract] NET LOSS PER NCM, INC. COMMON SHARE: Earnings Per Share [Abstract] Costandotherreimbursement Cost and Other Reimbursement Cost and Other Reimbursement Antidilutive Securities Antidilutive Securities [Axis] Accrued expenses Accrued Liabilities, Current Interest income Interest and Other Income Less: current portion of debt Long-Term Debt, Current Maturities Recently Issued Accounting Pronouncements Recently Issued Accounting Pronouncements Policy [Text Block] Recently issued accounting pronouncements. Net cash provided by financing activities Net Cash Provided by (Used in) Financing Activities Accounting Policies [Abstract] Accounting Policies [Abstract] Interest on borrowings Interest Expense, Debt Accrued payroll and related expenses Employee-related Liabilities, Current Variable Lease, Cost Variable Lease, Cost LOSS BEFORE INCOME TAXES Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Other current assets and prepaid expenses Prepaid Expense and Other Assets, Current Revolving Credit Facility, Debt Draw Revolving Credit Facility, Debt Draw Revolving Credit Facility, Debt Draw Loss Per Share Earnings Per Share [Text Block] Municipal Bonds [Member] Municipal Bonds [Member] Comprehensive income, net of tax Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest Related Party Transaction [Line Items] Related Party Transaction [Line Items] 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. (Gain) loss on modification and retirement of debt, net Gain (Loss) on Extinguishment of Debt Gain (Loss) on Extinguishment of Debt Income Tax Contingency [Table] Income Tax Contingency [Table] Estimated Fair Values of Company's Financial Instruments Fair Value, by Balance Sheet Grouping [Table Text Block] Amounts due from founding members Due From Founding Members, Current Due From Founding Members, Current Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided by (Used in) Financing Activities, Continuing Operations [Abstract] Entity Registrant Name Entity Registrant Name Stock Issued During Period, Shares, New Issues Stock Issued During Period, Shares, New Issues Cumulative Effect of New Accounting Principle in Period of Adoption (Deprecated 2020-01-31) Cumulative-effect adjustment for adoption of ASU 2014-09 Cumulative Effect of Adoption of ASU 2016-13, Adjustment to Retained Earnings Cumulative Effect of Adoption of ASU 2016-13, Adjustment to Retained Earnings Schedule of Other Assets Schedule of Cost Method Investments [Table Text Block] Membership units exchangeable into common stock ratio Membership Units Conversion Ratio Membership units conversion ratio. Subsequent Event Subsequent Events [Text Block] Payable to founding members under tax receivable agreement (including payables to related parties of $0.4 and $0.0, 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. Entity Address, City or Town Entity Address, City or Town General Company Information [Line Items] General Company Information [Line Items] General company information. Senior Notes Due Two Zero Two Six [Member] [Member] Senior Notes Due Two Zero Two Six [Member] [Member] Senior Notes Due Two Zero Two Six [Member] [Member] Credit Agreement Third Agreement Credit Agreement Third Amendment [Member] Credit Agreement Third Amendment OPERATING EXPENSES: Operating Expenses [Abstract] Reversal of related deferred rent liability Deferred Rent Credit, Noncurrent Total equity/(deficit) Balance Balance Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest Consolidation Consolidation, Policy [Policy Text Block] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent Customer Percentage of AR Customer Percentage of Accounts Receivable Customer Percentage of Accounts Receivable Minimum Minimum [Member] Noncontrolling interests Stockholders' Equity Attributable to Noncontrolling Interest Initial Credit Agreement Initial Credit Agreement [Member] Initial Credit Agreement Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Entity Emerging Growth Company Entity Emerging Growth Company Common stock, par value (in usd per share) Common Stock, Par or Stated Value Per Share Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Related Party AP and Accrued Expenses Related Party AP and Accrued Expenses Related Party AP and Accrued Expenses Maturities Available-For-Sale Debt Securities, Maturity Available-For-Sale Debt Securities, Maturity Fair Value Measurements Fair Value Disclosures [Text Block] Investment, Name Investment, Name [Axis] Investment, Name [Axis] Adjustments for New Accounting Pronouncements Accounting Standards Update [Axis] Entity File Number Entity File Number Trading Symbol Trading Symbol Nonoperating Gains (Losses) Nonoperating Gains (Losses) Intangible Assets Intangible Assets Disclosure [Text Block] Municipal Notes [Member] Municipal Notes [Member] Integration and other encumbered payments, related parties - financing activities Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates, Financing Activities Payments received from related parties for their acquired theatres that are subject to an existing on-screen advertising contract. Credit Agreement [Axis] Credit Agreement [Axis] Credit Agreement Schedule of Mandatory Distributions to Members Distributions Made to Limited Liability Company (LLC) Member, by Distribution [Table Text Block] Effective tax rate Effective Income Tax Rate Reconciliation, Percent Cash payment due to founding members/managing member Distributions payable to founding members Distributions Payable Distributions payable. Tax Year 2020 Tax Year 2020 [Member] Proceeds from Lines of Credit Proceeds from Lines of Credit Estimates Use of Estimates, Policy [Policy Text Block] Cash equivalents Cash and Cash Equivalents, Fair Value Disclosure AffiliateCircuitSharePayment [Member] AffiliateCircuitSharePayment [Member] AffiliateCircuitSharePayment LIBOR London Interbank Offered Rate (LIBOR) [Member] Subsequent Events [Abstract] Subsequent Events [Abstract] Marketing and Advertising Expense Marketing and Advertising Expense Accounts payable and accrued expenses (including payments to related parties of $0.0 and $0.6, respectively) Increase (Decrease) in Accounts Payable and Accrued Liabilities Income Taxes Income Tax Disclosure [Text Block] Cost of Goods and Services Sold Proceedsfromdispositionofintangibleassetsbynetworkaffiliates Proceeds from disposition of intangible assets by network affiliates (AMC acquisition of Cinetopia) Weighted-average interest rate Debt, Weighted Average Interest Rate Credit Facility Revolving Credit Facility [Member] Credit Facility [Domain] Operating Costs and Expenses Operating Costs and Expenses Cash paid for interest Interest Paid, Excluding Capitalized Interest, Operating Activities Basic (in usd per share) Earnings Per Share, Basic Common membership units issued 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. Cost-method ownership percentage Cost Method Investment Ownership Percentage Cost method investment ownership percentage. Total amounts due to founding members, net Related Party Transaction, Due from (to) Related Party Make Good Balance Reclassed as Deferred Revenue Make Good Balance Reclassed as Deferred Revenue Make Good Balance Reclassed as Deferred Revenue Selling and marketing costs Selling and Marketing Expense Net senior secured leverage ratio Debt Instrument, Dividend Restriction, Net Senior Secured Leverage Ratio Debt Instrument, Dividend Restriction, Net Senior Secured Leverage Ratio Total NCM, Inc. stockholders’ equity/(deficit) Stockholders' Equity Attributable to Parent Purchase of movie tickets and concession products (included in prepaid expenses) (1) Prepaid Expense, Current RevolvingCreditFacilityMember2022 RevolvingCreditFacilityMember2022 [Member] RevolvingCreditFacilityMember2022 Noncancelable contract terms Noncancelable Contract Terms Noncancelable contract terms. customer ten percent of revenue Customer with revenue in excess of ten percent of total revenue Customer with revenue in excess of ten percent of total revenue Ownership [Domain] Ownership [Domain] Common Membership Units Redeemed Common Membership Units Redeemed Common Membership Units Redeemed CumulativeEffectAdjustmentForAdoptionOfASU201613ToRetainedEarnings CumulativeEffectAdjustmentForAdoptionOfASU201613ToRetainedEarnings CumulativeEffectAdjustmentForAdoptionOfASU201613ToRetainedEarnings Net total leverage ratio, covenant Debt Instrument, Covenant, Net Total Leverage Ratio Debt Instrument, Covenant, Net Total Leverage Ratio Entity Interactive Data Current Entity Interactive Data Current Fair Value, by Balance Sheet Grouping [Table] Fair Value, by Balance Sheet Grouping [Table] Accumulated amortization, intangible assets Finite-Lived Intangible Assets, Accumulated Amortization Aggregate percentage of theater access fee paid Percentage Of Theater Access Fee Paid Percentage of theater access fee paid. Document Information, Document [Axis] Document Information, Document [Axis] RevolvingCreditFacilityMember2018 RevolvingCreditFacilityMember2018 [Member] RevolvingCreditFacilityMember2018 Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Cinemark Holdings Inc [Member] Cinemark Cinemark Holdings Inc [Member] Cinemark holdings, Inc. Debt Instrument, Restrictive Covenants Credit Agreement EBITDA Limit Credit Agreement EBITDA Limit Promissory Notes Promissory Notes [Member] Promissory notes. Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Retained Earnings (Distribution in Excess of Earnings) Retained Earnings Retained Earnings [Member] Cash dividends declared Cash dividends on shares of NMC Inc Dividends, Common Stock, Cash Lease, Cost Lease, Cost Common Stock Common Stock [Member] Share-based compensation issued Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Lease Cost Lease, Cost [Table Text Block] Number of reportable segment Number of Reportable Segments Class of Stock Class of Stock [Axis] Revenue Recognition Revenue [Policy Text Block] Senior unsecured notes due 2026 Senior Unsecured Notes Due Two Thousand Twenty Eight [Member] Senior Unsecured Notes Due Two Thousand Twenty Eight [Member] Statement [Table] Statement [Table] Document [Domain] Document [Domain] Changes In Equity Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Effects of Changes, Net [Table Text Block] Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests Document Quarterly Report Document Quarterly Report Letter of Credit Letter of Credit [Member] CURRENT ASSETS: Assets, Current [Abstract] Long-term lease liability Operating Lease, Liability, Noncurrent Other investments Cost Method Investments Range Statistical Measurement [Axis] Term Loan -Second Tranche Term Loan -Second Tranche [Member] Term Loan -Second Tranche Common membership units outstanding Units of Partnership Interest, Amount Retained earnings (distributions in excess of earnings) Retained Earnings (Accumulated Deficit) Other Operating Activities, Cash Flow Statement Other Operating Activities, Cash Flow Statement Receivables, net of allowance of $1.9 and $1.7, respectively Accounts Receivable, after Allowance for Credit Loss, Current Debt Covenant Period [Domain] Debt Covenant Period [Domain] [Domain] for Debt Covenant Period [Axis] Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Equity Components Equity Components [Axis] Scenario [Domain] Scenario [Domain] Stock Options And Non-Vested Restricted Stock Stock Options And Non Vested Restricted Stock [Member] Stock options and non-vested restricted stock. Fair Value, Measurements, Recurring Fair Value, Recurring [Member] 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 Related Party Transactions Related Party Transactions Disclosure [Text Block] Increase (Decrease) in Accounts Payable, Related Parties Increase (Decrease) in Accounts Payable, Related Parties Revision of Prior Period [Domain] Revision of Prior Period [Domain] Document Fiscal Year Focus Document Fiscal Year Focus Statement [Line Items] Statement [Line Items] Debt instrument, frequency of periodic payment Debt Instrument, Frequency of Periodic Payment Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis] Total Nonoperating Income (Expense) Variable Rate Variable Rate [Domain] Fair Value, Hierarchy Fair Value Hierarchy and NAV [Axis] Long Term Marketable Securities [Member] Long Term Marketable Securities [Member] Long-term marketable securities. Operating lease, right-of-use asset Operating Lease, Right-of-Use Asset Two Founding Members Two Founding Members [Member] Two founding members. Document Transition Report Document Transition Report Financial Commercial Paper Commercial Paper Financial [Member] Commercial paper financial. Local Phone Number Local Phone Number OPERATING INCOME (LOSS) Operating Income (Loss) Common stock owned (in shares) Common Stock Owned, Shares Common Stock Owned, Shares Local and regional advertising revenue Local Advertising Revenue [Member] Local Advertising Revenue [Member] Document Information [Table] Document Information [Table] Common stock, shares outstanding (in shares) Balance (in shares) Balance (in shares) Common Stock, Shares, Outstanding Revenue from Rights Concentration Risk [Member] Revenue from Rights Concentration Risk [Member] 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. Credit Agreement [Domain] Credit Agreement [Domain] Credit Agreement [Domain] NCM LLC equity issued for purchase of intangible asset Noncontrolling Interest, Increase from Subsidiary Equity Issuance Pretax Book Income Pretax Book Income Pretax Book Income Adjustments to reconcile consolidated net loss to net cash used in operating activities: Adjustments to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Net total leverage ratio Debt Instrument, Net Total Leverage Ratio Debt Instrument, Net Total Leverage Ratio Income tax expense Income tax benefit Income Tax Expense (Benefit) Gross unrealized losses related to individual securities Debt Securities, Available-for-Sale, Unrealized Loss Debt Issuance Costs, Line of Credit Arrangements, Gross Debt Issuance Costs, Line of Credit Arrangements, Gross Deferred tax assets, valuation allowance Deferred Tax Assets, Valuation Allowance Preferred stock, par value (in usd per share) Preferred Stock, Par or Stated Value Per Share Income Statement [Abstract] Income Statement [Abstract] Additional Paid in Capital (Deficit) Additional Paid-in Capital [Member] Document Fiscal Period Focus Document Fiscal Period Focus Founding Members Related Party Founding Members [Member] Related Party Founding Members [Member[ Advertising operating costs Cost of Goods and Services Sold Incentive Distribution, Recipient [Domain] Incentive Distribution, Recipient [Domain] Debt Covenant Period [Axis] Debt Covenant Period [Axis] Debt Covenant Period [Axis] Diluted (in shares) Diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Accumulated depreciation, property and equipment Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Debt issuance costs, net Debt Issuance Costs, Line of Credit Arrangements, Net Amortization rate Debt Instrument, Amortization Rate Debt Instrument, Amortization Rate Debt Securities, Available-for-sale [Line Items] Debt Securities, Available-for-Sale [Line Items] Base Rate Base Rate [Member] Other Significant Noncash Transaction, Value of Consideration Given Other Significant Noncash Transaction, Value of Consideration Given Common stock, $0.01 par value; 260,000,000 and 175,000,000 shares authorized, 81,492,426 and 80,626,889 issued and outstanding, respectively Common Stock, Value, Issued Carrying Value Reported Value Measurement [Member] Debt Instrument, Name [Domain] Debt Instrument, Name Debt Instrument, Name [Domain] Short-term Lease, Cost Short-Term Lease, Cost Senior secured notes due 2028 Senior Secured Notes Due Two Thousand Twenty Eight [Member] Senior Secured Notes Due Two Thousand Twenty Eight [Member] Preferred stock, shares authorized (in shares) Preferred Stock, Shares Authorized 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 AMC and Cinemark American Multi Cinema Inc And Cinemark Holdings Inc [Member] American Multi-Cinema, Inc. and Cinemark Holdings, Inc. Less: Net loss attributable to noncontrolling interests Net Income (Loss) Attributable to Noncontrolling Interest Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] CURRENT LIABILITIES: Liabilities, Current [Abstract] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items] Common stock, shares issued (in shares) Common Stock, Shares, Issued Investment in AC JV, LLC Equity Method Investments Deferred revenue Contract with Customer, Liability, Current Contract with Customer, Liability, Current Contract with Customer, Liability, Current Accounting Standards Update 2016-02 Accounting Standards Update 2016-02 [Member] Cash and cash equivalents used in determining senior secured leverage ratio Debt Instrument, Senior Secured Leverage Ratio, Cash And Cash Equivalents Basis Debt Instrument, Senior Secured Leverage Ratio, Cash And Cash Equivalents Basis National advertising revenue National Advertising Revenue [Member] National advertising revenue. 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] Common Units Common Units [Member] Common units. Amendment Flag Amendment Flag Net cash used in investing activities Net Cash Provided by (Used in) Investing Activities Operating Lease, Cost Operating Lease, Cost Debt instrument face amount Debt Instrument, Face Amount Investment Type Investment Type [Axis] Proceeds from revolving credit facility Proceeds from Long-Term Lines of Credit COMPREHENSIVE LOSS ATTRIBUTABLE TO NCM, INC. Comprehensive Income (Loss), Net of Tax, Attributable to Parent Liabilities recorded for related party obligations Guarantor Obligations, Current Carrying Value Noncancelable Long Term Contracts Noncancelable Long Term Contracts Noncancelable Long Term Contracts Entity Current Reporting Status Entity Current Reporting Status Financial Ratio Requirement Financial Ratio Requirement [Member] Financial Ratio Requirement Goodwill and Intangible Assets Disclosure [Abstract] Goodwill and Intangible Assets Disclosure [Abstract] Other current liabilities Other Liabilities, Current Other assets Other Assets, Noncurrent Senior secured leverage ratio Senior Secured Leverage Ratio Senior secured leverage ratio. 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 Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Repayment of term loan facility Repayments of Notes Payable Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent Cash dividends declared (in usd per share) Dividends Payable, Amount Per Share Schedule of Related Party Transactions Schedule of Related Party Transactions [Table Text Block] Costs and Other Reimbursment Costs and Other Reimbursment Costs and Other Reimbursment Cinemark and Regal Cinemark and Regal [Member] Cinemark and Regal [Member] Cinemark and Regal [Member] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Basis of Presentation Basis of Accounting, Policy [Policy Text Block] Property and equipment, net of accumulated depreciation of $55.6 and $59.9, respectively Property, Plant and Equipment, Net Operating lease payments Operating Lease, Payments Repayments of Long-Term Debt Repayments of Long-Term Debt Increase (decrease) in intangible assets, net Finite-Lived Intangible Assets, Period Increase (Decrease) (Gain) loss on re-measurement of the payable to founding members under the tax receivable agreement Gain on re-measurement of the payable to founding members under the tax receivable agreement 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. 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 Accrued distributions to founding members (including accrued distributions to related parties of $0.0 and $—, respectively) Noncash Distributions To Founding Members Noncash distributions to founding members. Income tax and other impacts of subsidiary 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 Allowance for doubtful accounts receivable Accounts Receivable, Allowance for Credit Loss, Current Long-term Debt Long-Term Debt Other non-operating (income) expense Other Nonoperating Income (Expense) The Company Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] Common stock, shares authorized (in shares) Common Stock, Shares Authorized Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] NON-CURRENT ASSETS: Assets, Noncurrent [Abstract] Maximum Maximum [Member] CumulativeEffectAdjustmentForAdoptionOfASU201613Net CumulativeEffectAdjustmentForAdoptionOfASU201613Net CumulativeEffectAdjustmentForAdoptionOfASU201613Net Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Other Payables to FM Other Payables to Founding Members Other Payables to Founding Members Cash distributions declared to members Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared Deferred revenue Increase (Decrease) in Contract with Customer, Liability Total current assets Assets, Current Cash payments (refunds) for income taxes Income Taxes Paid, Net Entity Small Business Entity Small Business Measurement Basis Measurement Basis [Axis] Other Commitments [Table] Other Commitments [Table] Fair Value, Measurement Frequency Measurement Frequency [Domain] Term Loan - Second Tranche, Discount Value Term Loan - Second Tranche, Discount Value Term Loan - Second Tranche, Discount Value Common Stock, Dividends, Per Share, Declared Dividends per share (in usd per share) Common Stock, Dividends, Per Share, Declared Common membership units issued, net of returned Common Membership Units Issued Net Of Units Surrendered Common membership units issued net of units surrendered. Intangible assets, net of accumulated amortization of $257.6 and $245.6, respectively Common unit adjustments, net of amortization and integration payments (included in intangible assets) Finite-Lived Intangible Assets, Net CONSOLIDATED NET LOSS Consolidated net loss Income (Loss) from Continuing Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest Term Loan - Second Tranche, Debt Issuance Costs Term Loan - Second Tranche, Debt Issuance Costs Term Loan - Second Tranche, Debt Issuance Costs ACJV Cash Distributions ACJV Cash Distributions ACJV Cash Distributions Distributions to founding members Noncontrolling Interest, Decrease from Distributions to Noncontrolling Interest Holders Fair Values of the Company's Assets Fair Value, Assets Measured on Recurring Basis [Table Text Block] Revenue from contract, payment due period from the customer Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Period Deferred tax assets, net of valuation allowance of $225.4 and $223.8, respectively Total other investments Other Long-Term Investments Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document And Entity Information [Abstract] Change from net loss income 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 Recently Adopted Accounting Pronouncements Recently Adopted Accounting Pronouncements Policy [Text Block] Recently adopted accounting pronouncements. Receivables, net Increase (Decrease) in Accounts Receivable Short-term debt Short-Term Debt Title of 12(b) Security Title of 12(b) Security Line of Credit, Covenant, Maximum Senior Secured Leverage Ratio Outstanding Credit Facility Waiver Limit Outstanding Credit Facility Waiver Limit AdjustmentsToAdditionalPaidInCapitalInvestmentInSubsidiary AdjustmentsToAdditionalPaidInCapitalInvestmentInSubsidiary AdjustmentsToAdditionalPaidInCapitalInvestmentInSubsidiary Debt instrument, repurchase amount Debt Instrument, Repurchase Amount Total Costs and Expenses Managing Member or General Partner [Axis] Managing Member or General Partner [Axis] Other than Temporary Impairment Losses, Investments Impairment on Investment Impairment on Investment Subsequent Events [Line Items] Subsequent Event [Line Items] Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend Finite-Lived Intangible Assets, Cost Incurred to Renew or Extend Debt Instrument [Line Items] Debt Instrument [Line Items] Local And Regional Advertising Revenue [Member] Local And Regional Advertising Revenue [Member] Local and regional advertising revenue. Purchases of marketable securities Payments to Acquire Available-for-Sale Securities Income Tax Contingency [Line Items] Income Tax Contingency [Line Items] Share-based compensation issued (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Payment of debt issuance costs Payments of Debt Issuance Costs U.S. Government Agency Bonds US Government Agencies Debt Securities [Member] Share-Based Compensation Share-Based Payment Arrangement [Policy Text Block] Income tax and other impacts of NCM LLC ownership changes Adjustments to Additional Paid in Capital, Other Interest income from notes receivable (included in interest income) Interest Income, Related Party LIABILITIES AND EQUITY/(DEFICIT) Liabilities and Equity [Abstract] Fair Value Estimate of Fair Value Measurement [Member] Tax Year 2017 Tax Year 2017 [Member] Amortized Cost Basis Debt Securities, Available-for-Sale, Amortized Cost Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] WEIGHTED AVERAGE SHARES OUTSTANDING: Weighted average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] IncreaseDecreaseInDueToFoundingMemversCurrent IncreaseDecreaseInDueToFoundingMembersCurrent IncreaseDecreaseInDueToFoundingMembersCurrent Accounts payable Accounts Payable, Current State and Federal State And Federal [Member] State And Federal [Member] Income Tax Authority [Axis] Income Tax Authority [Axis] Fair value of cost method investment Cost Method Investments, Fair Value Disclosure Additional amount accrued related to minimum guarantees Guarantor Obligations, Maximum Exposure, Undiscounted, Additional Amount Accrued Guarantor Obligations, Maximum Exposure, Undiscounted, Additional Amount Accrued American Multi Cinema Inc [Member] AMC American Multi Cinema Inc [Member] American Multi-Cinema, Inc. Write-off of debt issuance costs Write off of Deferred Debt Issuance Cost Accrued Distributions Made to LLC Accrued Distributions Made to Related Parties Accrued Distributions Made to Related Parties Covenant During Waiver Min [Member] Covenant During Waiver Min [Member] Covenant During Waiver [Member] Entity Filer Category Entity Filer Category Basic (in shares) Weighted Average Number of Shares Outstanding, Basic EQUITY/(DEFICIT): Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest [Abstract] Tax Year 2018 [Member] Tax Year 2018 [Member] Proceeds from notes receivable - founding members (including payments from related parties of $— and $0.0, respectively) Proceeds from related parties Proceeds from Collection of Long-Term Loans to Related Parties 2019 ESA Amendment Extension Period 2019 ESA Amendment Extension Period 2019 ESA Amendment Extension Period Ownership percentage Equity Method Investment, Ownership Percentage Share-based Payment Arrangement, Expense Share-Based Payment Arrangement, Expense National and Regional Advertising Revenue [Member] [Member] National and Regional Advertising Revenue [Member] [Member] National and Regional Advertising Revenue [Member] [Member] COMMITMENTS AND CONTINGENCIES (NOTE 8) Commitments and Contingencies Security Exchange Name Security Exchange Name Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Preferred stock, $0.01 par value; 10,000,000 shares authorized, none issued and outstanding, respectively Preferred Stock, Value, Issued Amount Increase In Payment Per Theater Patron Amount Increase In Payment Per Theater Patron Amount Increase In Payment Per Theater Patron Credit Agreement Second Amendment Credit Agreement Second Amendment [Member] Credit Agreement Second Amendment Fair Value, Separate Account Investment [Table] Fair Value, Separate Account Investment [Table] Senior secured notes due 2028 Senior Unsecured Notes Due Two Zero Two Six [Member] Senior unsecured notes due two zero two six. Schedule of Outstanding Debt Schedule of Debt [Table Text Block] Short-term Debt, Type Short-Term Debt, Type [Domain] REVENUE (including revenue from related parties of $4.6, $1.6, $7.4 and $2.0, respectively) Revenue Revenue from Contract with Customer, Excluding Assessed Tax Impairment of investment Cost-method Investments, Other than Temporary Impairment Debt instrument issued percentage of face value Debt Instrument Issued Percentage Of Face Value Debt instrument issued percentage of face value. NON-CURRENT LIABILITIES: Liabilities, Noncurrent [Abstract] Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Significant Unobservable Inputs (Level 3) Fair Value, Inputs, Level 3 [Member] Intercompany Loan Amount [Domain] Intercompany Loan Amount [Domain] Intercompany Loan Amount [Domain] Total non-current assets Assets, Noncurrent Long-term marketable securities Aggregate Fair Value - Long term marketable securities Debt Securities, Available-for-Sale, Noncurrent Depreciation expense Depreciation, Nonproduction Allowance for credit losses Accounts Receivable, Allowance for Credit Loss, Beginning Balance Accounts Receivable, Allowance for Credit Loss, Ending Balance Accounts Receivable, Allowance for Credit Loss Integration payments due from founding members Integration Payments Due From Related Parties Integration payments due from related parties. Customer with revenue in excess of ten percent of Accounts Payable Customer with revenue in excess of ten percent of Accounts Receivable Customer with revenue in excess of ten percent of Accounts Receivable Revenue from Contracts with Customers Revenue from Contract with Customer [Text Block] Non-cash loss (gain) on re-measurement of the payable to founding members under the tax receivable agreement 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. Investments Investments [Domain] Noncontrolling Interest Noncontrolling Interest [Member] Future patron payment Future period Forecast [Member] Repurchase of stock for restricted stock tax withholding Payment, Tax Withholding, Share-Based Payment Arrangement TOTAL LIABILITIES AND EQUITY/(DEFICIT) Liabilities and Equity Percentage of Network Theaters Open Percentage of Network Theaters Open Percentage of Network Theaters Open Amortization of debt issuance costs Amortization of Debt Issuance Costs Long-term Debt, Type Long-Term Debt, Type [Axis] Interest receivable on notes receivable (included in other current assets) Interest Receivable Related Party Related Party [Axis] Repayments of revolving credit facility Repayments of Long-Term Lines of Credit Loss per NCM, Inc. share: Earnings Per Share, Diluted [Abstract] Add: Dilutive effect of stock options and restricted stock (in shares) Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements CumulativeEffectAdjustmentForAdoptionOfASU201613ToNCI CumulativeEffectAdjustmentForAdoptionOfASU201613ToNCI CumulativeEffectAdjustmentForAdoptionOfASU201613ToNCI Significant Other Observable Inputs (Level 2) Fair Value, Inputs, Level 2 [Member] Current Fiscal Year End Date Current Fiscal Year End Date Debt Securities, Available-for-sale, Realized Gain (Loss) Available-for-Sale Securities, Continuous Unrealized Loss Position, Accumulated Loss Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Diluted (in usd per share) Earnings Per Share, Diluted Accounting Standards Update 2016-13 [Member] Accounting Standards Update 2016-13 [Member] Share-based compensation expense/capitalized APIC, Share-Based Payment Arrangement, Increase for Cost Recognition Senior Secured Credit Facility Senior Secured Credit Facility [Member] Senior secured credit facility. Interest rate on notes receivable Notes Receivable Stated Interest Rate Notes receivable stated interest rate. Total current liabilities Liabilities, Current Available Cash Requirement, Covenant During Waiver Min Available Cash Requirement, Covenant During Waiver Min [Member] Available Cash Requirement, Covenant During Waiver Min Schedule of Available-for-sale Securities [Table] Schedule of Available-for-Sale Securities [Table] 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. Senior secured notes due 2022 Senior Notes Due Two Zero Two Two [Member] Senior notes due two zero two two. Estimated revenue to be recognized on noncancelable leases Remaining performance obligation Revenue, Remaining Performance Obligation, Amount Impaired investment balance Impaired investment balance Impaired investment balance Unused line fee, percent Line of Credit Facility, Commitment Fee Percentage Debt payment terms Debt Instrument, Payment Terms NON-OPERATING EXPENSES (INCOME): Nonoperating Income (Expense) [Abstract] Percentage of increase in payment per theatre patron Percentage Of Increase In Payment Per Theater Patron Percentage of increase in payment per theater patron. Entity Address, Address Description Entity Address, Address Line One Income Tax Authority [Domain] Income Tax Authority [Domain] Product and Service [Axis] Products and Services Product and Service [Axis] Class of Stock Class of Stock [Domain] Unbilled accounts receivable Unbilled Contracts Receivable Deferred tax assets reduction Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount Fair Value Disclosures [Abstract] Fair Value Disclosures [Abstract] Remaining borrowing capacity of credit facility Line of Credit Facility, Remaining Borrowing Capacity Amortization of intangibles recorded for network theater screen leases Amortization of Leased Asset Intercompany Loan Intercompany Loan Intercompany Loan Credit Facility Credit Facility [Axis] Proceeds from sale and maturities of marketable securities Proceeds from Sale and Maturity of Debt Securities, Available-for-Sale Payments to Third Parties for Extension of Intangible Assets Payments to Third Parties for Extension of Intangible Assets Payments to Third Parties for Extension of Intangible Assets Subsequent Event [Table] Subsequent Event [Table] Number of shares of restricted stock and stock units vested Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Percentage of common membership units outstanding Limited Liability Company or Limited Partnership, Members or Limited Partners, Ownership Interest Entity Tax Identification Number Entity Tax Identification Number Impaired Investments Impaired Investments [Member] Impaired investments. Term Loan - Second Tranche, net Term Loan - Second Tranche, net Term Loan - Second Tranche, net Short Term Marketable Securities [Member] Short Term Marketable Securities [Member] Short-term marketable securities. Accrued integration and other encumbered theater payments due from founding members Accrued Integration And Other Encumbered Theater Payments Due From Founding Members, Financing Activities Accrued Integration And Other Encumbered Theater Payments Due From Founding Members, Financing Activities Accrued integration and other encumbered theater payments due from founding members. Summary of Revenue from Contracts with Customers Disaggregation of Revenue [Table Text Block] Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] Other cash flows from operating activities Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates, Operating Activities Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates, Operating Activities Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates, Operating Activities Theater access fees and revenue share to founding members (including fees to related parties of $16.9, $7.1, $29.8, and $8.4, respectively) Theater Access Fees Theater Access Fees Maximum potential payment Guarantor Obligations, Maximum Exposure, Undiscounted Financial Certificates Of Deposit Financial Certificates Of Deposit [Member] Financial certificates of deposit. CHANGE IN CASH AND CASH EQUIVALENTS: Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect DueToFoundingMembersCurrent DueToFoundingMembersCurrent DueToFoundingMembersCurrent Commercial Paper [Member] Commercial Paper [Member] Entity Central Index Key Entity Central Index Key Antidilutive Securities, Name Antidilutive Securities, Name [Domain] Asset restrictions Line of Credit Facility, Asset Restrictions Measurement Frequency Measurement Frequency [Axis] Contract Liabilities Contract Liabilities [Roll Forward] Contract Liabilities [Roll Forward] National Cine Media Inc [Member] NCM Inc. National Cine Media Inc [Member] National CineMedia, Inc. Tax Period [Axis] Tax Period [Axis] Measurement Input Type [Axis] Measurement Input Type [Axis] Entity Entity [Domain] Deferred income tax expense, net of valuation allowance Deferred income tax expense, net of valuation allowance Deferred income tax expense, net of valuation allowance Type of Adoption Accounting Standards Update [Domain] City Area Code City Area Code Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) Accounts Receivable, Allowance for Credit Loss, Period Increase (Decrease) Administrative and other costs General and Administrative Expense ASSETS Assets [Abstract] Other, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Debt issuance costs, long-term Debt issuance costs, long-term Debt Issuance Costs, Noncurrent, Net Long-term Debt, Type Long-Term Debt, Type [Domain] Other Commitments [Line Items] Other Commitments [Line Items] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Theaters Open in Network Theaters Open in Network Theaters Open in Network Debt [Member] Debt [Member] Customerinexcess10percentofAR Customerinexcess10percentofAR Customerinexcess10percentofAR Supplemental disclosure of non-cash financing and investing activity: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Non-cash share-based compensation Share-Based Payment Arrangement, Noncash Expense Impairment on Investment Remaining Balance Impairment on Investment Remaining Balance Impairment on Investment Remaining Balance Repayment of term loan facility Repayments of Senior Debt Variable Rate Variable Rate [Axis] Other liabilities Other Liabilities, Noncurrent Equity in earnings of non-consolidated entities Income (Loss) from Equity Method Investments Income (Loss) from Equity Method Investments Purchases of property and equipment Payments to Acquire Property, Plant, and Equipment Asset Impairment Charges Asset Impairment Charges Unrestricted Cash and Cash Equivalent Unrestricted Cash and Cash Equivalent Unrestricted Cash and Cash Equivalent Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Contract with Customer, Liability, New Contract Liabilities Contract with Customer, Liability, New Contract Liabilities Contract with Customer, Liability, New Contract Liabilities Schedule of Loss Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Promissory notes receivable from founding members Notes Receivable, Related Parties AC JV, LLC A C J V L L C [Member] A C J V L L C [Member] AC JV, LLC. Remaining term (in years) Agreement With Founding Members, Remaining Term Agreement With Founding Members, Remaining Term Available Cash Requirement, Covenant During Waiver Max Available Cash Requirement, Covenant During Waiver Max [Member] Available Cash Requirement, Covenant During Waiver Max