Entity Central Index Key Theater access fees net of beverage revenues and other encumbered theaters payments. Distributions payable. Integration payments due from related parties. Accrued cost and other reimbursable expense receivable payable. Document And Entity Information [Abstract] Document And Entity Information [Abstract] Document Type Document Type Amendment Flag Amendment Flag Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Filer Category Entity Filer Category Current Fiscal Year End Date Current Fiscal Year End Date Entity Common Stock, Shares Outstanding Entity Common Stock Shares Outstanding Prepaid administrative fees to managing members. Statement Of Financial Position [Abstract] ASSETS Assets [Abstract] CURRENT ASSETS: Assets Current [Abstract] Cash and cash equivalents Cash And Cash Equivalents At Carrying Value Receivables, net of allowance of $5.7 and $6.0, respectively Accounts Receivable Net Current Prepaid expenses Prepaid Expense Current Prepaid administrative fees to managing member Prepaid Administrative Fees To Managing Members Current portion of notes receivable - founding members Notes And Loans Receivable Net Current Other current assets Other Assets Current Total current assets Assets Current NON-CURRENT ASSETS: Assets Noncurrent [Abstract] Property and equipment, net of accumulated depreciation of $72.9 and $70.4, respectively Property Plant And Equipment Net Intangible assets, net of accumulated amortization of $152.1 and $145.4, respectively Finite Lived Intangible Assets Net Long-term notes receivable, net of current portion - founding members Notes And Loans Receivable Net Noncurrent Other investments Other Long Term Investments Debt issuance costs, net Debt Issuance Costs Line Of Credit Arrangements Net Other assets Other Assets Noncurrent Total non-current assets Assets Noncurrent TOTAL ASSETS Assets LIABILITIES AND MEMBERS’ EQUITY/(DEFICIT) Liabilities And Stockholders Equity [Abstract] CURRENT LIABILITIES: Liabilities Current [Abstract] Accrued expenses Accrued Liabilities Current Accrued payroll and related expenses Employee Related Liabilities Current Accounts payable Accounts Payable Current Deferred revenue Deferred Revenue Current Total current liabilities Liabilities Current NON-CURRENT LIABILITIES: Liabilities Noncurrent [Abstract] Long-term debt, net of debt issuance costs of $8.2 and $8.7, respectively Long Term Debt Noncurrent Other liabilities Other Liabilities Noncurrent Total non-current liabilities Liabilities Noncurrent Total liabilities Liabilities COMMITMENTS AND CONTINGENCIES (NOTE 5) Commitments And Contingencies MEMBERS’ EQUITY/(DEFICIT) Stockholders Equity TOTAL LIABILITIES AND EQUITY/(DEFICIT) Liabilities And Stockholders Equity Allowance for doubtful accounts receivable Allowance For Doubtful Accounts Receivable Current Accumulated depreciation, property and equipment Accumulated Depreciation Depletion And Amortization Property Plant And Equipment Accumulated amortization, intangible assets Finite Lived Intangible Assets Accumulated Amortization Debt issuance costs, long-term Deferred Finance Costs Noncurrent Net Direct costs arising from transactions associated with network operations. These costs are categorized as cost of goods sold. Managing member administrative fee. Income Statement [Abstract] REVENUE (including revenue from founding members of $8.0 and $8.4, respectively) Advertising Revenue OPERATING EXPENSES: Operating Expenses [Abstract] Advertising operating costs Advertising Revenue Cost Network costs Network Costs Theater access fees—founding members Related Party Costs Selling and marketing costs Selling And Marketing Expense Administrative and other costs General And Administrative Expense Administrative fee—managing member Managing Member Administrative Fee Depreciation and amortization Depreciation And Amortization Total Costs And Expenses OPERATING INCOME Operating Income Loss NON-OPERATING EXPENSES: Nonoperating Income Expense [Abstract] Interest on borrowings Interest Expense Debt Interest income Interest And Other Income Other non-operating income Other Nonoperating Income Total Nonoperating Income Expense LOSS BEFORE INCOME TAXES Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest Income tax expense Income Tax Expense Benefit NET LOSS Net Income Loss Revenue from founding members Revenue From Related Parties Proceeds from integration payments and other encumbered theater payments made by affiliates. Unit settlement for share-based compensation. Statement Of Cash Flows [Abstract] CASH FLOWS FROM OPERATING ACTIVITIES: Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract] Net loss Adjustments to reconcile net loss to net cash provided by operating activities: Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract] Non-cash share-based compensation Share Based Compensation Impairment on investment Costmethod Investments Other Than Temporary Impairment Amortization of debt issuance costs Amortization Of Financing Costs Other Other Noncash Income Expense Changes in operating assets and liabilities: Increase Decrease In Operating Capital [Abstract] Receivables, net Increase Decrease In Accounts Receivable Accounts payable and accrued expenses Increase Decrease In Accounts Payable And Accrued Liabilities Amounts due to founding members and managing member Increase Decrease In Due To Related Parties Current Deferred revenue Increase Decrease In Deferred Revenue Other, net Increase Decrease In Other Operating Capital Net Net cash provided by operating activities Net Cash Provided By Used In Operating Activities Continuing Operations CASH FLOWS FROM INVESTING ACTIVITIES: Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract] Purchases of property and equipment Payments To Acquire Property Plant And Equipment Purchases of intangible assets from network affiliates Payments To Acquire Intangible Assets Proceeds from notes receivable - founding members Proceeds From Collection Of Longterm Loans To Related Parties Net cash used in investing activities Net Cash Provided By Used In Investing Activities Continuing Operations CASH FLOWS FROM FINANCING ACTIVITIES: Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract] Proceeds from borrowings Proceeds From Long Term Lines Of Credit Repayments of borrowings Repayments Of Long Term Lines Of Credit Founding member integration payments and other encumbered theater payments Proceeds From Integration Payments And Other Encumbered Theater Payments Made By Affiliates Distributions to founding members and managing member Payments Of Distributions To Affiliates Unit settlement for share-based compensation Unit Settlement For Share Based Compensation Net cash used in financing activities Net Cash Provided By Used In Financing Activities Continuing Operations Cash, cash equivalents and restricted cash at beginning of period Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Cash, cash equivalents and restricted cash at end of period Noncash distributions to founding members and managing member. Accrued integration and other wncumbered theater payments due from founding members. Supplemental disclosure of non-cash financing and investing activity: Cash Flow Noncash Investing And Financing Activities Disclosure [Abstract] Purchase of an intangible asset with NCM LLC equity Noncash Or Part Noncash Acquisition Intangible Assets Acquired1 Accrued distributions to founding members and managing member Noncash Distributions To Founding Members And Managing Members Accrued integration and other encumbered theater payments due from founding members Accrued Integration And Other Encumbered Theater Payments Due From Founding Members Supplemental disclosure of cash flow information: Supplemental Cash Flow Information [Abstract] Cash paid for interest Interest Paid Cash paid for income taxes, net of refunds Income Taxes Paid Net Accounting Policies [Abstract] The Company Organization Consolidation Basis Of Presentation Business Description And Accounting Policies [Text Block] Revenue From Contract With Customer [Abstract] Revenue from Contracts with Customers Revenue From Contract With Customer [Text Block] Goodwill And Intangible Assets Disclosure [Abstract] Intangible Assets Intangible Assets Disclosure [Text Block] Related Party Transactions [Abstract] Related Party Transactions Related Party Transactions Disclosure [Text Block] Debt Disclosure [Abstract] Borrowings Debt Disclosure [Text Block] Commitments And Contingencies Disclosure [Abstract] Commitments and Contingencies Commitments And Contingencies Disclosure [Text Block] Fair Value Disclosures [Abstract] Fair Value Measurements Fair Value Disclosures [Text Block] Basis of Presentation Basis Of Accounting Policy Policy [Text Block] Estimates Use Of Estimates Significant accounting policies. Significant Accounting Policies Significant Accounting Policies Policy [Text Block] Revenue Recognition Revenue Recognition Policy [Text Block] Disclosure of accounting policy for concentration of credit risk and significant customers. Concentration of Credit Risk and Significant Customers Concentration Of Credit Risk And Significant Customers Policy [Text Block] Share-Based Compensation Share Based Compensation Option And Incentive Plans Policy Recently adopted accounting pronouncements. Recently Adopted Accounting Pronouncements Recently Adopted Accounting Pronouncements Policy [Text Block] Recently issued accounting pronouncements. Recently Issued Accounting Pronouncements Recently Issued Accounting Pronouncements Policy [Text Block] Summary of Revenue from Contracts with Customers Disaggregation Of Revenue Table [Text Block] Summary of changes in deferred revenue. Summary of Changes in Deferred Revenue Summary Of Changes In Deferred Revenue Table [Text Block] Statement [Table] Statement [Table] Related Party Related Party Transactions By Related Party [Axis] Related Party Related Party [Domain] "Founding Members" refer to AMC, Regal and Cinemark and their affiliates. Founding Members [Member] Founding Members [Member] Statement [Line Items] Statement [Line Items] Schedule of Related Party Transactions Schedule Of Related Party Transactions Table [Text Block] Schedule of Mandatory Distributions to Members Distributions Made To Limited Liability Company Llc Member By Distribution Table [Text Block] Schedule of Amounts Due to Founding Members, Net Schedule Of Incentive Distributions Made To Managing Members Or General Partners By Distribution [Text Block] Schedule of incentive distributions made to from managing members by distribution. Schedule of Amounts Due to/from Managing Member Schedule Of Incentive Distributions Made To From Managing Members By Distribution Table [Text Block] Schedule of Outstanding Debt Schedule Of Debt Table [Text Block] Schedule of Other Investments Schedule Of Cost Method Investments Table [Text Block] Estimated Fair Values of Company's Financial Instruments Fair Value By Balance Sheet Grouping [Text Block] Revenue guarantee period. General company information. General company information. General Company Information [Table] General Company Information [Table] Range Range [Axis] Range Range [Member] Minimum [Member] Minimum [Member] Maximum [Member] Maximum [Member] Legal Entity Legal Entity [Axis] Entity Entity [Domain] National CineMedia, Inc. NCM Inc. [Member] National Cine Media Inc [Member] Regal entertainment group. Regal [Member] Regal Entertainment Group [Member] Cinemark holdings, Inc. Cinemark [Member] Cinemark Holdings Inc [Member] American Multi-Cinema, Inc. AMC [Member] American Multi Cinema Inc [Member] Concentration Risk Benchmark Concentration Risk By Benchmark [Axis] Concentration Risk Benchmark Concentration Risk Benchmark [Domain] Accounts Receivable [Member] Accounts Receivable [Member] Sales Revenue, Net [Member] Sales Revenue Net [Member] Concentration Risk Type Concentration Risk By Type [Axis] Concentration Risk Type Concentration Risk Type [Domain] Credit Concentration Risk [Member] Credit Concentration Risk [Member] Customer Concentration Risk [Member] Customer Concentration Risk [Member] Adjustments for New Accounting Pronouncements Adjustments For New Accounting Pronouncements [Axis] Type of Adoption Type Of Adoption [Member] ASU 2014-09 [Member] Accounting Standards Update201409 [Member] General Company Information [Line Items] General Company Information [Line Items] Range of terms, in years Revenue Guarantee Period Membership units conversion ratio. Common membership units outstanding Units Of Partnership Interest Amount Percentage of common membership units outstanding Limited Liability Company L L C Or Limited Partnership L P Members Or Limited Partners Ownership Interest Membership units exchangeable into common stock ratio Membership Units Conversion Ratio Number of reportable segment Number Of Reportable Segments Number of advertising agency groups contributing to more than 10% Of outstanding gross receivables. Number of customers contributing to more than 10% of revenue. 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 customers contributing to more than 10% of revenue Number Of Customers Contributing To More Than Ten Percent Of Revenue Share based compensation arrangement by share based payment award equity instruments other than options vested in period and stock options exercised. Unit settlement for stock option exercises. Number of shares acquired due to vesting and exercise of options Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period And Stock Options Exercised Stock option exercises Unit Settlement For Stock Option Exercises Cumulative-effect adjustment related to change in accounting for barter transactions on contracts that are not completed Cumulative Effect Of New Accounting Principle In Period Of Adoption Accrued reserves. Disaggregation Of Revenue [Table] Disaggregation Of Revenue [Table] Scenario Statement Scenario [Axis] Scenario, Unspecified Scenario Unspecified [Domain] Scenario Forecast [Member] Scenario Forecast [Member] Balance Sheet Location Balance Sheet Location [Axis] Balance Sheet Location Balance Sheet Location [Domain] Current asset. Current Asset [Member] Current Asset [Member] Maximum [Member] Disaggregation of Revenue [Line Items] Disaggregation Of Revenue [Line Items] Make-good provision Accrued Reserves Revenue from contract, payment due period from the customer Revenue Remaining Performance Obligation Expected Timing Of Satisfaction Period Noncancelable contracts terms. Noncancelable contracts terms Noncancelable Contracts Terms Estimated revenue expected to be recognized related to performance obligations that are unsatisfied (or partially unsatisfied) Revenue Remaining Performance Obligation Products and Services Product Or Service [Axis] Products and Services Products And Services [Domain] 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 [Member] Geographical Statement Geographical [Axis] Geographical Segment Geographical [Domain] National advertising revenue. National Advertising Revenue [Member] National Advertising Revenue [Member] Local and regional advertising revenue. Local and Regional Advertising Revenue [Member] Local And Regional Advertising Revenue [Member] Total revenue Revenue From Contract With Customer Excluding Assessed Tax Deferred revenue performance obligations satisfied. Balance at beginning of period Performance obligations satisfied Deferred Revenue Performance Obligations Satisfied New contract liabilities Deferred Revenue Additions Balance at end of period Unbilled accounts receivable expected to be billed term. Unbilled accounts receivable, expected to be billed Unbilled Accounts Receivable Expected To Be Billed Term Unbilled accounts receivable Unbilled Contracts Receivable Percentage change in theater attendance for Common Unit adjustment to occur. Schedule Of Finite Lived Intangible Assets [Table] Schedule Of Finite Lived Intangible Assets [Table] American Multi Cinema acquisition of Carmike Cinemas Inc. AMC;s Acquisition of Carmike Cinemas, Inc [Member] American Multi Cinema Acquisition Of Carmike Cinemas Inc [Member] Related Party Transaction Related Party Transaction [Axis] Related Party Transaction Related Party Transaction [Domain] Memorandum of understanding to effectuate aspects of Final Judgment. NCM, Inc. and NCM LLC, MOU with AMC to Effectuate Aspects of Final Judgment [Member] Memorandum Of Understanding To Effectuate Aspects Of Final Judgment [Member] American Multi-Cinema, Inc. and Cinemark Holdings, Inc. AMC and Cinemark [Member] American Multi Cinema Inc And Cinemark Holdings Inc [Member] Finite-Lived Intangible Assets [Line Items] Finite Lived Intangible Assets [Line Items] Percentage increase (decrease) in theater attendance for Common Unit adjustment to occur Percentage Increase Decrease In Theater Attendance For Common Unit Adjustment To Occur Common membership units issued net of units surrendered. Common membership units issued. Common membership units returned. Common membership units issued, net of returned Common Membership Units Issued Net Of Units Surrendered Common membership units issued Common Membership Units Issued Common membership units returned Common Membership Units Returned Increase (decrease) in intangible assets, net Finite Lived Intangible Assets Period Increase Decrease Number of theaters required to transfer advertising rights. Common membership units surrendered due to required theater transfer. Common membership units surrendered due to transferred theaters. Common membership units surrendered to compensate for lost operating income for transferred theaters. Value of common membership units surrendered for transferred theaters. Common membership units surrendered, compensation for lost operating income for divested theaters, term. Number of theaters required to transfer advertising rights to another advertising provider Number Of Theaters Required To Transfer Advertising Rights Common membership units surrendered Common Membership Units Surrendered Due To Required Theater Transfer Common membership units surrendered under adjustment for divested theaters Common Membership Units Surrendered Due To Transferred Theaters Common membership units surrendered under compensate for lost operating income for divested theaters Common Membership Units Surrendered To Compensate For Lost Operating Income For Transferred Theaters Common membership units surrendered, value, under compensate for lost operating income for divested theaters Value Of Common Membership Units Surrendered For Transferred Theaters Compensate for lost operating income for divested theaters, term Common Membership Units Surrendered Compensation For Lost Operating Income For Divested Theaters Term Proceeds from integration and other encumbered theater payments made by affiliates. Integration and other encumbered theater payments received from founding members Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates The length of on-screen advertising time to satisfy agreement obligations. Schedule Of Related Party Transactions By Related Party [Table] Schedule Of Related Party Transactions By Related Party [Table] Managing member. Managing Member [Member] Managing Member [Member] Investment, Name Schedule Of Equity Method Investment Equity Method Investee Name [Axis] Investment, Name Equity Method Investee Name [Domain] AC JV, LLC. AC JV, LLC [Member] A C J V L L C [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] On-screen advertising time to satisfy agreement obligations, in seconds Length Of On Screen Advertising Time To Satisfy Agreement Obligations Income Statement Location Income Statement Location [Axis] Income Statement Location Income Statement Location [Domain] Beverage concessionaire. Beverage Concessionaire [Member] Beverage Concessionaire [Member] Purchase of Movie tickets and concession products and rental of theater space. Purchase Of Movie Tickets And Concession Products And Rental Of Theater Space [Member] Purchase Of Movie Tickets And Concession Products And Rental Of Theater Space [Member] Advertising revenue Theater access fee Interest income from notes receivable (included in interest income) Interest Income Related Party Length of on-screen advertising time which founding members have a right to purchase Length of on screen advertising time which founding members purchased. One founding members. One Founding Members [Member] One Founding Members [Member] Two founding members. Two Founding Members [Member] Two Founding Members [Member] Debt Instrument Debt Instrument [Axis] Debt Instrument, Name Debt Instrument Name [Domain] Promissory notes. Promissory Notes Promissory Notes [Member] On-screen advertising time purchased, in seconds Length Of On Screen Advertising Time Which Founding Members Purchased 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 Notes receivable stated interest rate. Ownership percentage Equity Method Investment Ownership Percentage Promissory notes receivable from founding members Notes Receivable Related Parties Interest rate on notes receivable Notes Receivable Stated Interest Rate Notes receivable payment term Debt Instrument Payment Terms Purchase of movie tickets and concession products. Purchase Of Movie Tickets And Concession Products [Member] Purchase Of Movie Tickets And Concession Products [Member] Finite-Lived Intangible Assets by Major Class Finite Lived Intangible Assets By Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name Finite Lived Intangible Assets Major Class Name [Domain] Common unit adjustments net of amortization and integration payments. Common Unit Adjustments Net of Amortization And Integration Payments [Member] Common Unit Adjustments Net Of Amortization And Integration Payments [Member] Prepaid expenses Interest receivable on notes receivable (included in other current assets) Interest Receivable Intangible assets, net of accumulated amortization Cash distributions declared to members Distribution Made To Limited Liability Company L L C Member Cash Distributions Declared Cash payment due to founding members/managing member Distributions Payable Theatre access fees, net of beverage revenues and other encumbered theater payments Theater Access Fees Net Of Beverage Revenues And Other Encumbered Theaters Payments Distributions payable to founding members Integration payments due from founding members Integration Payments Due From Related Parties Cost and other reimbursement Accrued Cost And Other Reimbursable Expense Receivable Payable Total amounts due to founding members, net Due To Related Parties Current Accrued cost and other reimbursable expenses. Distributions payable to managing member Cost and other reimbursement Accrued Cost And Other Reimbursable Expenses Common stock shares of NCM Inc Common Stock Shares Outstanding Cash dividends on shares of NMC Inc Investment Income Dividend Investment in AC JV, LLC Equity Method Investments Equity in earnings of non-consolidated entities Income Loss From Equity Method Investments Debt Instrument [Table] Debt Instrument [Table] Senior secured notes due two zero two two. Senior Secured Notes Due 2022 [Member] Senior Secured Notes Due Two Zero Two Two [Member] Senior unsecured notes due two zero two six. Senior Unsecured Notes Due 2026 [Member] Senior Unsecured Notes Due Two Zero Two Six [Member] Long-term Debt, Type Longterm Debt Type [Axis] Long-term Debt, Type Longterm Debt Type [Domain] Term loan. Term Loans [Member] Term Loan [Member] Credit Facility Credit Facility [Axis] Credit Facility Credit Facility [Domain] Revolving Credit Facility [Member] Revolving Credit Facility [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Outstanding Balance Debt Instrument Carrying Amount Less: debt issuance costs related to term loans and senior notes Carrying value of long-term debt Maturity Date Debt Instrument Maturity Date Interest Rate Debt Instrument Interest Rate Stated Percentage Short-term Debt, Type Short Term Debt Type [Axis] Short-term Debt, Type Short Term Debt Type [Domain] Letters of Credit [Member] Letter Of Credit [Member] Variable Rate Variable Rate [Axis] Variable Rate Variable Rate [Domain] LIBOR [Member] London Interbank Offered Rate L I B O R [Member] Base Rate [Member] Base Rate [Member] Senior secured credit facility. Senior Secured Credit Facility [Member] Senior Secured Credit Facility [Member] Borrowing amount of credit facility Line Of Credit Facility Maximum Borrowing Capacity Debt Instrument, carrying value Remaining borrowing capacity of credit facility Line Of Credit Facility Remaining Borrowing Capacity Unused line fee, percent Line Of Credit Facility Commitment Fee Percentage Basis spread on variable rate, percent Debt Instrument Basis Spread On Variable Rate1 Weighted-average interest rate Debt Weighted Average Interest Rate Senior secured leverage ratio. Senior secured leverage ratio Senior Secured Leverage Ratio Debt instrument face amount Debt Instrument Face Amount Stated interest rate Date of first required interest payment Debt Instrument Date Of First Required Payment1 Debt instrument, frequency of periodic payment Debt Instrument Frequency Of Periodic Payment Debt instrument issued percentage of face value. Debt instrument issued percentage of face value Debt Instrument Issued Percentage Of Face Value Guarantee obligations amount paid. Other Commitments [Table] Other Commitments [Table] Other Commitments [Line Items] Other Commitments [Line Items] Maximum potential payment Guarantee Obligations Maximum Exposure Guarantee obligations amount paid Guarantee Obligations Amount Paid Percentage of increase in payment per theater patron. Period of increase in payment on theater patron. Percentage of increase in payment per digital screen and digital cinema equipment Percentage of theater access fee paid. Percentage of increase in payment per theater patron Percentage Of Increase In Payment Per Theater Patron Term of increase in payment percentage per theater patron Period Of Increase In Payment On Theater Patron Percentage of increase in payment per digital screen and digital cinema equipment Percentage Of Increase In Payment Per Digital Screen And Digital Cinema Equipment Aggregate percentage of theater access fee paid Percentage Of Theater Access Fee Paid Liabilities recorded for related party obligations Guarantee Obligations Current Carrying Value Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Table] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Table] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items] Schedule Of Fair Value Of Separate Accounts By Major Category Of Investment [Line Items] Other investments Cost Method Investments Total other investments Cost method investment ownership percentage. Cost-method ownership percentage Cost Method Investment Ownership Percentage Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table] Investment Type Investment Type [Axis] Investments Investment Type Categorization [Member] Impaired investments. Impaired Investments [Member] Impaired Investments [Member] 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] Impairment of investment Fair value of cost method investment Cost Method Investments Fair Value Disclosure Fair Value By Balance Sheet Grouping [Table] Fair Value By Balance Sheet Grouping [Table] Notes Due 2022 [Member] Notes Due 2026 [Member] Measurement Basis Fair Value By Measurement Basis [Axis] Fair Value Disclosure Item Amounts [Default] Portion At Fair Value Fair Value Disclosure [Member] Fair Value Measurement Fair Value Disclosure Item Amounts [Domain] Carrying Value [Member] Carrying Reported Amount Fair Value Disclosure [Member] Fair Value [Member] Estimate Of Fair Value Fair Value Disclosure [Member] Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items] Debt Instrument Debt Instrument Fair Value