National CineMedia (NCMI) 10-Q 8 Nov 21 2021 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information - shares	9 Months Ended	12 Months Ended
	Sep. 30, 2021	Dec. 30, 2021	Aug. 05, 2021
Document Information [Line Items]
Document Transition Report	false
Document Quarterly Report	true
Title of 12(b) Security	Common Stock, par value $0.01 per share
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	20-5665602
Entity Address, Address Description	6300 S. Syracuse Way, Suite 300
Entity Address, City or Town	Centennial
Entity Address, State or Province	CO
Entity Address, Postal Zip Code	80111
City Area Code	303
Local Phone Number	792-3600
Trading Symbol	NCMI
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes
Document Period End Date		Sep. 30, 2021
Document Type		10-Q
Amendment Flag	false
Document Period End Date		Sep. 30, 2021
Entity File Number		001-33296
Document Fiscal Year Focus	2021
Document Fiscal Period Focus	Q3
Entity Registrant Name	NATIONAL CINEMEDIA, INC.
Entity Central Index Key	0001377630
Entity Filer Category	Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	true
Entity Current Reporting Status	Yes
Current Fiscal Year End Date	--12-30
Entity Shell Company	false
Entity Common Stock, Shares Outstanding			80,546,260

CONDENSED CONSOLIDATED BALANCE

CONDENSED CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
CURRENT ASSETS:
Cash and cash equivalents	$ 110.1	$ 180.3
Short-term marketable securities	0	0.3
Receivables, net of allowance of $1.7 and $2.3, respectively	28.5	16.2
Other current assets and prepaid expenses	15	3.1
Total current assets	153.6	199.9
NON-CURRENT ASSETS:
Property and equipment, net of accumulated depreciation of $59.2 and $77.7, respectively	21.8	27.5
Intangible assets, net of accumulated amortization of $241.5 and $223.0, respectively	613.9	627.8
Deferred Income Tax Assets, Net	0	0
Deferred tax assets, net of valuation allowance of $226.2 and $212.0, respectively	0.7	0.8
Long-term marketable securities	1.2	1.2
Debt issuance costs, net	3.4	3.3
Other assets	26.2	26.5
Total non-current assets	666.5	686.3
TOTAL ASSETS	820.1	886.2
DueToFoundingMembersCurrent	4	2
CURRENT LIABILITIES:
Payable to founding members under tax receivable agreement (including payables to related parties of $0.0 and $0.6, respectively)	0	0.9
Accrued expenses	17.5	19
Accrued payroll and related expenses	8.5	4.8
Accounts payable	15.1	13.7
Deferred revenue	11.1	5.1
Short-term debt	3.2	2.7
Other current liabilities	2	1.8
Total current liabilities	61.4	50
NON-CURRENT LIABILITIES:
Long-term debt, net of debt issuance costs of $11.2 and $8.0, respectively	1,093.6	1,049.6
Payable to founding members under tax receivable agreement (including payables to related parties of $21.3 and $23.7, respectively)	29.3	32.6
Other liabilities	21	22.6
Total non-current liabilities	1,143.9	1,104.8
Total liabilities	1,205.3	1,154.8
EQUITY/(DEFICIT):
Preferred stock, $0.01 par value; 10,000,000 shares authorized, none issued and outstanding, respectively	0	0
Common stock, $0.01 par value; 175,000,000 shares authorized, 80,417,510 and 78,040,818 issued and outstanding, respectively	0.8	0.8
Additional paid in capital/(deficit)	(196.6)	(207.5)
Retained earnings (distributions in excess of earnings)	(336.7)	(266.4)
Total NCM, Inc. stockholders’ equity/(deficit)	(532.5)	(473.1)
Noncontrolling interests	147.3	204.5
Total equity/(deficit)	(385.2)	(268.6)
TOTAL LIABILITIES AND EQUITY/(DEFICIT)	$ 820.1	$ 886.2

CONDENSED CONSOLIDATED BALANC_2

CONDENSED CONSOLIDATED BALANCE SHEETS (PARENTHETICAL) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Allowance for doubtful accounts receivable	$ 1.7	$ 2.3
Accumulated depreciation, property and equipment	59.2	77.7
Accumulated amortization, intangible assets	241.5	223
Deferred tax assets, valuation allowance	226.2	212
Current payable to founding members under tax receivable agreement	0	0.9
Long-term payable to founding members under tax receivable agreement	29.3	32.6
Debt issuance costs, long-term	$ 11.2	$ 8
Preferred stock, par value (in usd per share)	$ 0.01
Preferred stock, shares authorized (in shares)	10,000,000
Common stock, par value (in usd per share)	$ 0.01
Common stock, shares authorized (in shares)	175,000,000
Common stock, shares issued (in shares)	80,417,510	78,040,818
Founding Members
Current payable to founding members under tax receivable agreement	$ 0	$ 0.6
Long-term payable to founding members under tax receivable agreement	$ 21.3	$ 23.7

CONDENSED STATEMENTS OF INCOME

CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
REVENUE (including revenue from related parties of $2.7, $0.2, $4.7 and $4.5, respectively)	$ 31.7	$ 6	$ 51.1	$ 74.7
OPERATING EXPENSES:
Advertising operating costs	5.2	1.1	9.9	8.4
Network costs	2	1.8	5.7	6.3
Theater access fees and revenue share to founding members (including fees to related parties of $11.4, $1.0, $19.8 and $13.6, respectively)	16.7	1.8	31	19.5
Selling and marketing costs	8.2	7.5	24.8	28.1
Administrative and other costs	9.6	5.8	29.4	23
Asset Impairment Charges	0	0	0	1.7
Depreciation expense	2.5	3.1	8.4	9.5
Amortization of intangibles recorded for network theater screen leases	6.2	6.2	18.5	18.4
Total	50.4	27.3	127.7	114.9
OPERATING LOSS	(18.7)	(21.3)	(76.6)	(40.2)
NON-OPERATING EXPENSES:
Interest on borrowings	16.6	13.7	48.2	40.9
Interest income	0	(0.1)	(0.1)	(0.6)
Gain on re-measurement of the payable to founding members under the tax receivable agreement	(1.8)	(1)	(3.2)	(0.7)
Other non-operating expense	0	0.1	(0.1)	(0.1)
Total	14.8	12.7	45.8	40
LOSS BEFORE INCOME TAXES	(33.5)	(34)	(122.4)	(80.2)
Income tax benefit	0	(3.1)	0	(7.7)
CONSOLIDATED NET LOSS	(33.5)	(30.9)	(122.4)	(72.5)
Less: Net loss attributable to noncontrolling interests	(18.3)	(18.2)	(65.1)	(42.3)
NET LOSS ATTRIBUTABLE TO NCM, INC.	(15.2)	(12.7)	(57.3)	(30.2)
COMPREHENSIVE LOSS ATTRIBUTABLE TO NCM, INC.	$ (15.2)	$ (12.7)	$ (57.3)	$ (30.2)
NET LOSS PER NCM, INC. COMMON SHARE:
Basic (in usd per share)	$ (0.19)	$ (0.16)	$ (0.72)	$ (0.39)
Diluted (in usd per share)	$ (0.19)	$ (0.16)	$ (0.72)	$ (0.39)
WEIGHTED AVERAGE SHARES OUTSTANDING:
Basic (in shares)	80,359,723	78,016,737	79,652,152	77,925,552
Diluted (in shares)	80,359,723	78,016,737	79,652,152	77,925,552
Debt [Member]
NON-OPERATING EXPENSES:
Nonoperating Gains (Losses)	$ 0	$ 0	$ (0.8)	$ (0.3)

CONDENSED STATEMENTS OF INCOM_2

CONDENSED STATEMENTS OF INCOME AND COMPREHENSIVE INCOME (PARENTHETICAL) (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Revenue	$ 31.7	$ 6	$ 51.1	$ 74.7
Founding Members
Revenue	$ 2.7	$ 0.2	4.7	4.5
Related Party Costs			$ 19.8	$ 13.6

CONDENSED CONSOLIDATED STATEMEN

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020
Adjustments to reconcile consolidated net loss to net cash (used in) provided by operating activities:
Deferred income tax benefit	$ 0	$ (7,700,000)
Depreciation expense	8,400,000	9,500,000
Amortization of intangibles recorded for network theater screen leases	18,500,000	18,400,000
Non-cash share-based compensation	6,500,000	1,100,000
Asset Impairment Charges	0	1,700,000
Amortization of debt issuance costs	3,000,000	1,900,000
Non-cash gain on re-measurement of the payable to founding members under the tax receivable agreement	(3,200,000)	(700,000)
Other	300,000	0
Other cash flows from operating activities	300,000	9,700,000
Payment To Founding Members Under Tax Sharing Arrangement	(900,000)	(12,800,000)
Other Operating Activities, Cash Flow Statement	(100,000)	0
CASH FLOWS FROM OPERATING ACTIVITIES:
Consolidated net loss	(122,400,000)	(72,500,000)
Changes in operating assets and liabilities:
Receivables, net	(12,300,000)	163,300,000
Accounts payable and accrued expenses (including payments to related parties of $0.6 and $0.0, respectively)	4,800,000	(18,700,000)
Deferred revenue	6,000,000	(600,000)
Other, net	(4,200,000)	(2,300,000)
Net cash (used in) provided by operating activities	(92,500,000)	85,900,000
CASH FLOWS FROM INVESTING ACTIVITIES:
Purchases of property and equipment	(3,900,000)	(6,600,000)
Purchases of marketable securities	0	(8,200,000)
Proceeds from sale and maturities of marketable securities	300,000	30,300,000
Net cash (used in) provided by investing activities	(3,600,000)	15,500,000
CASH FLOWS FROM FINANCING ACTIVITIES:
CHANGE IN CASH AND CASH EQUIVALENTS:	(70,200,000)	161,800,000
Cash and cash equivalents at beginning of period	180,300,000	55,900,000
Cash and cash equivalents at end of period	110,100,000	217,700,000
Payment of dividends	(12,900,000)	(26,500,000)
Proceeds from revolving credit facility	0	210,000,000
Repayments of revolving credit facility	0	(82,000,000)
Proceeds from Issuance of Debt	50,000,000	0
Repayment of term loan facility	(2,300,000)	(2,000,000)
Payment of debt issuance costs	(7,200,000)	(1,300,000)
Distributions to founding members	0	(36,800,000)
Repurchase of stock for restricted stock tax withholding	(1,700,000)	(1,000,000)
Net cash provided by financing activities	25,900,000	60,400,000
Related Party AP and Accrued Expenses	600,000	0
IncreaseDecreaseInDueToFoundingMemversCurrent	2,000,000	(4,700,000)
Supplemental disclosure of non-cash financing and investing activity:
Purchase of an intangible asset with NCM LLC equity	14,100,000	10,500,000
Other Significant Noncash Transaction, Value of Consideration Given	6,600,000	0
Increase (decrease) in dividend equivalent accrual not requiring cash in the period	1,000,000	(200,000)
Supplemental disclosure of cash flow information:
Cash paid for interest	42,300,000	37,600,000
Cash (refunds) payments for income taxes	(100,000)	500,000
Founding Members
Adjustments to reconcile consolidated net loss to net cash (used in) provided by operating activities:
Other cash flows from operating activities	0	0.1
Payment To Founding Members Under Tax Sharing Arrangement	600,000	9,000,000
Debt [Member]
Adjustments to reconcile consolidated net loss to net cash (used in) provided by operating activities:
Nonoperating Gains (Losses)	$ (800,000)	$ (300,000)

CONDENSED CONSOLIDATED STATEM_2

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (PARENTHETICAL) - USD ($)	9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020
Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates, Operating Activities	$ 300,000	$ 9,700,000
Payment To Founding Members Under Tax Sharing Arrangement	(900,000)	(12,800,000)
Founding Members
Proceeds From Integration And Other Encumbered Theater Payments Made By Affiliates, Operating Activities	0	0.1
Payment To Founding Members Under Tax Sharing Arrangement	$ 600,000	$ 9,000,000

CONDENSED CONSOLIDATED STATEM_3

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY/(DEFICIT) - USD ($) $ in Thousands	Total	Common Stock	Additional Paid in Capital (Deficit)	Retained Earnings (Distribution in Excess of Earnings)	Noncontrolling Interest
Balance at Dec. 26, 2019	$ (121,200)	$ 800	$ (209,200)	$ (171,100)	$ 258,300
Balance (in shares) at Dec. 26, 2019		77,568,986
Distributions to founding members	(4,400)				(4,400)
Cumulative Effect of New Accounting Principle in Period of Adoption (Deprecated 2020-01-31)	1,200
NCM LLC equity issued for purchase of intangible asset	10,500		5,000		5,500
Income tax and other impacts of NCM LLC ownership changes	(500)		(3,900)		3,400
Comprehensive income, net of tax	(72,500)			(30,200)	(42,300)
Share-based compensation issued	(1,000)		(1,000)
Share-based compensation issued (in shares)		468,625
Share-based compensation expense/capitalized	1,300		700		600
Cash dividends declared	(25,500)			(25,500)
Balance at Sep. 24, 2020	(210,400)	$ 800	(208,400)	(225,600)	222,800
Balance (in shares) at Sep. 24, 2020		78,037,611
CumulativeEffectAdjustmentForAdoptionOfASU201613ToNCI	1,700
CumulativeEffectAdjustmentForAdoptionOfASU201613Net	$ 2,900
Common Stock, Dividends, Per Share, Declared	$ 0.33
Balance at Jun. 25, 2020	$ (175,000)	$ 800	(209,100)	(207,400)	240,700
Balance (in shares) at Jun. 25, 2020		78,000,338
Comprehensive income, net of tax	(30,900)			(12,700)	(18,200)
Share-based compensation issued	0		0
Share-based compensation issued (in shares)		37,273
Share-based compensation expense/capitalized	1,000		700		300
Cash dividends declared	(5,500)			5,500
Balance at Sep. 24, 2020	$ (210,400)	$ 800	(208,400)	(225,600)	222,800
Balance (in shares) at Sep. 24, 2020		78,037,611
Common Stock, Dividends, Per Share, Declared	$ 0.07
Balance at Dec. 31, 2020	$ (268,600)	$ 800	(207,500)	(266,400)	204,500
Balance (in shares) at Dec. 31, 2020		78,040,818
NCM LLC equity issued for purchase of intangible asset	14,100		6,800		7,300
Income tax and other impacts of NCM LLC ownership changes	$ (200)		1,200		(1,400)
Stock Issued During Period, Shares, New Issues	1,390,567
Stock Issued During Period, Value, New Issues	$ 6,600		6,600
AdjustmentsToAdditionalPaidInCapitalInvestmentInSubsidiary	(6,600)		(6,600)
Comprehensive income, net of tax	(122,400)			(57,300)	(65,100)
Share-based compensation issued	(1,800)		(1,800)
Share-based compensation issued (in shares)		986,125
Share-based compensation expense/capitalized	6,700		4,700		2,000
Cash dividends declared	(13,000)			(13,000)
Balance at Sep. 30, 2021	$ (385,200)	$ 800	(196,600)	(336,700)	147,300
Balance (in shares) at Sep. 30, 2021		80,417,510
Common Stock, Dividends, Per Share, Declared	$ 0.15
Balance at Jul. 01, 2021	$ (349,000)	$ 800	(197,600)	(317,400)	165,200
Balance (in shares) at Jul. 01, 2021		80,238,751
Changes in Taxes and LLC Ownership					(200)
Income tax and other impacts of NCM LLC ownership changes	100		300
Comprehensive income, net of tax	(33,500)			(15,200)	(18,300)
Share-based compensation issued	(400)		(400)
Share-based compensation issued (in shares)		178,759
Share-based compensation expense/capitalized	1,700		1,100		600
Cash dividends declared	(4,100)			(4,100)
Balance at Sep. 30, 2021	$ (385,200)	$ 800	$ (196,600)	$ (336,700)	$ 147,300
Balance (in shares) at Sep. 30, 2021		80,417,510
Common Stock, Dividends, Per Share, Declared	$ 0.05

CONDENSED CONSOLIDATED STATEM_4

CONDENSED CONSOLIDATED STATEMENTS OF EQUITY/(DEFICIT) (PARENTHETICAL) (UNAUDITED) - $ / shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Statement of Stockholders' Equity [Abstract]
Dividends per share (in usd per share)	$ 0.05	$ 0.07	$ 0.15	$ 0.33

The Company

The Company	9 Months Ended
	Sep. 24, 2020
Accounting Policies [Abstract]
The Company	THE COMPANY Description of Business National CineMedia, Inc., a Delaware corporation (“NCM, Inc.”), is a holding company with the sole purpose of becoming a member and sole manager of National CineMedia, LLC (“NCM LLC”), a Delaware limited liability company. NCM LLC is currently owned by NCM, Inc., Regal Cinemas, Inc. and Regal CineMedia Corporation, wholly owned subsidiaries of Cineworld Group plc and Regal Entertainment Group (“Regal”) and Cinemark Media, Inc. and Cinemark USA, Inc., wholly owned subsidiaries of Cinemark Holdings, Inc. (“Cinemark”). The terms “NCM”, “the Company” or “we” shall, unless the context otherwise requires, be deemed to include the consolidated entity. On March 23, 2021 American Multi-Cinema, Inc., a wholly owned subsidiary of AMC Entertainment, Inc. (“AMC”) redeemed 1,390,567 membership units, which were issued to AMC in accordance with the terms of the common unit adjustment agreement with the founding members, in exchange for shares of NCM, Inc. common stock, reducing AMC’s ownership to 0.0% as of September 30, 2021. AMC, Regal, Cinemark and their affiliates are referred to in this document as “founding members”. The Company operates the largest cinema advertising network reaching movie audiences in the U.S. and sells advertising under long-term exhibitor service agreements (“ESAs”) with the founding members and with certain third-party network affiliates, under long-term network affiliate agreements. As previously disclosed, the COVID-19 pandemic has had a significant impact on the world and the Company’s business beginning in March 2020 as the United States’ government and other state and local governments issued restrictions on travel, public gatherings and other events and issued social distancing guidelines. These governmental restrictions resulted in the closure of most of the theaters within the Company’s network for approximately six months and thus the Company generated no in-theater advertising revenue during that time. When theaters began to reopen late in the third quarter of 2020, in-theater advertising revenue continued to be adversely impacted as attendance at the reopened theaters was significantly less than prior comparative periods due primarily to the shift in motion picture release schedules and the local/state COVID-19 patron capacity limitations. These and subsequent developments are referred to as the “COVID-19 Pandemic.” Beginning in 2021, the FDA approved multiple COVID-19 vaccines, which have been widely administered throughout the United States. As a result, during the second quarter of 2021, government restrictions lessened allowing theaters in key larger markets to fully reopen and by the third quarter of 2021 all of the theaters within the Company’s network were open. Multiple successful major motion pictures were released during the second and third quarters of 2021 resulting in the highest theater attendance since the start of the COVID-19 Pandemic. Despite the increase in network attendance, the second and third quarter of 2021 in-theater advertising revenue remained significantly below historical levels. During the third quarter of 2021 variants of the COVID-19 virus spread throughout the United States resulting in the reinstatement of mask mandates in certain areas with increased infection rates and concerning some advertisers about the impact on theater attendance. On September 17, 2019, NCM LLC entered into amendments to the ESAs with Cinemark and Regal (collectively, the “2019 ESA Amendments”). The 2019 ESA Amendments extended the contract life of the ESAs with Cinemark and Regal by four years resulting in a weighted average remaining term of the ESAs with the founding members (based upon pre-COVID-19 attendance levels) of approximately 18.0 years as of September 30, 2021. The network affiliate agreements expire at various dates between December 2021 and December 2037. The weighted average remaining term of the ESAs and the network affiliate agreements together is 15.7 years as of September 30, 2021 (based upon pre-COVID-19 attendance levels). As of September 30, 2021, NCM LLC had 166,605,854 common membership units outstanding, of which 80,417,510 (48.3%) were owned by NCM, Inc., 43,026,794 (25.8%) were owned by Regal and 43,161,550 (25.9%) were owned by Cinemark and 0 (0.0%) were owned by AMC. The membership units held by the founding members are exchangeable into NCM, Inc. common stock on a one-for-one basis. Basis of Presentation The Company has prepared the unaudited Condensed Consolidated Financial Statements and related notes of NCM, Inc. in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures typically included in an annual report have been condensed or omitted for this quarterly report. The balance sheet as of December 31, 2020 is derived from the audited financial statements of NCM, Inc. Therefore, the unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto included in the Company’s annual report on Form 10-K filed for the fiscal year ended December 31, 2020. In the opinion of management, all adjustments necessary to present fairly in all material respects the financial position, results of operations and cash flows for all periods presented have been made. Historically, the Company’s business has been seasonal and for this and other reasons operating results for interim periods have not been indicative of the Company’s full year results or future performance. Given the impact of the COVID-19 Pandemic during 2021, management expects the Company's 2021 quarterly results to vary from historical trends. As a result of the various related party agreements discussed in Note 5— Related Party Transactions , the operating results as presented are not necessarily indicative of the results that might have occurred if all agreements were with non-related third parties. The Company manages its business under one reportable segment of advertising. Estimates —The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include those related to the reserve for uncollectible accounts receivable, share-based compensation and income taxes. Actual results could differ from estimates. Going Concern — The accompanying unaudited Condensed Consolidated Financial Statements are prepared in accordance with GAAP applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Based on the Company’s current financial position and liquidity sources, including current cash balances, and forecasted future cash flows, management believes the Company can meet its operating obligations as they become due, including all currently scheduled interest and debt service payments within one year following the date that these financial statements are issued. Refer to Note 6— Borrowings for information on the Company’s debt obligations, including a current waiver of certain financial covenants. However, the Company does not expect to meet its financial covenants within one year following the date that these financial statements are issued. If these financial covenants are not met a majority of the lenders of the Senior Secured Credit Facility are permitted under the Credit Agreement to accelerate the debt which could also result in a cross-default under NCM LLC’s senior notes. Considering current liquidity sources, the Company would not be able to repay the Company’s total outstanding debt balance. These conditions and events raise substantial doubt about the Company’s ability to continue as a going concern. In light of this, the Company is actively pursuing a number of options including amending its Senior Secured Credit Facility to extend a waiver of these financial covenants and obtaining additional financing either through a loan from third party lenders or NCM, Inc. Management expects to conclude one of these alternatives in the very near term; however, there can be no assurance that the Company will be successful in completing any of these options. As a result, management’s plan cannot be considered probable and thus does not alleviate the substantial doubt about the Company’s ability to continue as a going concern. The unaudited Condensed Consolidated Financial Statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty. Significant Accounting Policies The Company’s annual financial statements included in its Form 10-K filed for the fiscal year ended December 31, 2020 contain a complete discussion of the Company’s significant accounting policies. Following is additional information related to the Company’s accounting policies. Revenue Recognition —The Company derives revenue principally from the advertising business, which includes advertising through its on-screen cinema network, lobby network (LEN) and lobby promotions in theaters, and on websites, mobile applications and out-of-home locations owned by NCM LLC and other companies. Revenue is recognized over time as the customer receives the benefits provided by NCM LLC’s advertising services and the Company has the right to payment for performance to date. The Company considers the terms of each arrangement to determine the appropriate accounting treatment. Concentration of Credit Risk and Significant Customers —The risk of credit loss related to the Company's trade receivables and unbilled receivables balances is accounted for through the allowance for doubtful accounts, a contra asset account which reduces the net receivables balance. The allowance for doubtful accounts balance is determined by pooling the Company's receivables with similar risk characteristics, specifically by type of customer (national or local/ regional) and then age of receivable, and applying historical write off percentages to these pools in order to determine the amount of expected credit losses as of the balance sheet date. National receivables are with large advertising agencies with strong reputations in the advertising industry and clients with stable financial positions and good credit ratings, represent larger receivables balances per customer and have significantly lower historical and expected credit loss patterns. Local and regional receivables are with smaller companies sometimes with less credit history and represent smaller receivable balances per customer and higher historical and expected credit loss patterns. The Company has smaller contracts with many local clients that are not individually significant. The Company also considers current economic conditions and trends to determine whether adjustments to historical loss rates are necessary. The Company also reserves for specific receivable balances that it expects to write off based on known concerns regarding the financial health of the customer. Receivables are written off when management determines amounts are uncollectible. The Company had one agency through which the Company sourced advertising revenue that accounted for 22.0% and 10.1% of the Company's gross outstanding receivable balance as of September 30, 2021 and December 31, 2020, respectively. During the three months ended September 30, 2021 and September 24, 2020, the Company had one customer that accounted for 11.8% and 28.8% of the Company's revenue, respectively. During the nine months ended September 30, 2021 and September 24, 2020, the Company had one customer that accounted for 11.6% and 10.6% of revenue, respectively. Long-lived Assets —The Company assesses impairment of long-lived assets pursuant to ASC 360 – Property, Plant and Equipment . This includes determining whether certain triggering events have occurred that could affect the value of an asset. The Company recorded losses of $0.0 million, $0.0 million, $0.0 million and $1.7 million related to the write-off of certain internally developed software during the three months ended September 30, 2021 and September 24, 2020 and the nine months ended September 30, 2021 and September 24, 2020, respectively. Share-Based Compensation —The Company has issued stock options, restricted stock, and restricted stock units to certain employees and its independent directors. The restricted stock and restricted stock unit grants for Company management vest upon the achievement of Company performance measures and/or service conditions, while non-management grants vest only upon the achievement of service conditions. Compensation expense of restricted stock and restricted stock units that vest upon the achievement of Company performance measures is based on management’s financial projections and the probability of achieving the projections, which require considerable judgment. A cumulative adjustment is recorded to share-based compensation expense in periods that management changes its estimate of the number of shares of restricted stock and restricted stock units expected to vest. Ultimately, the Company adjusts the expense recognized to reflect the actual vested shares following the resolution of the performance conditions. Dividends are accrued when declared on unvested restricted stock and restricted stock units that are expected to vest and are only paid with respect to shares that actually vest. On February 28, 2021 and March 2, 2021, the Company’s Board of Directors approved certain modifications to equity awards awarded under the Company’s 2016 Equity Incentive Plan to adjust performance metrics, vesting amount and future performance goals in light of the COVID-19 Pandemic resulting in incremental share-based compensation expense of $0.2 million and $1.7 million for the three months and nine months ended September 30, 2021, respectively. During the three months ended September 30, 2021 and September 24, 2020 and the nine months ended September 30, 2021 and September 24, 2020, 268,782, 50,052, 1,394,321 and 607,733 shares of restricted stock and restricted stock units vested, respectively. Consolidation —NCM, Inc. consolidates the accounts of NCM LLC under the provisions of ASC 810, Consolidation . The following table presents the changes in NCM, Inc.’s equity resulting from net income attributable to NCM, Inc. and transfers to or from noncontrolling interests (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Net loss attributable to NCM, Inc. $ (15.2) $ (12.7) $ (57.3) $ (30.2) NCM LLC equity issued for purchase of intangible asset — — 6.8 5.0 Income tax and other impacts of subsidiary ownership changes 0.3 — 1.2 (3.9) NCM LLC common membership unit redemption — — (6.6) — Issuance of shares to founding members — — 6.6 — Change from net loss income attributable to NCM, Inc. and $ (14.9) $ (12.7) $ (49.3) $ (29.1) Recently Adopted Accounting Pronouncements During the first quarter of 2021, the Company adopted Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which removes the following exceptions for the Company to analyze in a given period: the exception to the incremental approach for intraperiod tax allocation; the exception to accounting for basis differences when there are ownership changes in foreign investments; and the exception in interim periods income tax accounting for year-to-date losses that exceed anticipated losses. The Company’s adoption of ASU 2019-12 did not have a material impact on the unaudited Condensed Consolidated Financial Statements or notes thereto. Recently Issued Accounting Pronouncements In March 2020, the FASB issued Accounting Standards Update No. 2020-04, Reference Rate Reform (“ASU 2020-04”), which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and ASU 2020-04 on the Company’s unaudited Condensed Consolidated Financial Statements. The Company has considered all other recently issued accounting pronouncements and does not believe the adoption of such pronouncements will have a material impact on its unaudited Condensed Consolidated Financial Statements or notes thereto.

Revenue from Contracts with Cus

Revenue from Contracts with Customers	3 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Revenue from Contracts with Customers	REVENUE FROM CONTRACTS WITH CUSTOMERS AND ACCOUNTS RECEIVABLE Revenue Recognition The Company derives revenue principally from the sale of advertising to national, regional and local businesses in Noovie® , the Company’s cinema advertising and entertainment pre-show. The Company also sells advertising through the LEN, a series of strategically placed screens located in movie theater lobbies, as well as other forms of advertising and promotions in theater lobbies. In addition, the Company sells online and mobile advertising, including through Noovie Audience Accelerator, through NCM's digital gaming products including Noovie Trivia , Noovie ARcade, Name That Movie and Noovie Shuffle, which can be played on the mobile apps or at Noovie.com and through partnerships with certain internet platforms . Further the Company sells advertising in a variety of complementary out of home venues, including restaurants, retail locations, convenience stores, college campuses and office and residential buildings. The Company also has a long-term agreement to exhibit the advertising of the founding members’ beverage suppliers. The Company makes contractual guarantees to deliver a specified number of impressions to view the customers’ advertising. If the contracted number of impressions are not delivered, the Company will run additional advertising to deliver the contracted impressions at a later date. The deferred portion of the revenue associated with undelivered impressions is referred to as a make-good provision. The Company defers the revenue associated with the make-good until the advertising airs to the audience specified in the advertising contract. The make-good provision is recorded within accrued expenses in the unaudited Condensed Consolidated Balance Sheet. As of September 30, 2021 and December 31, 2020, the Company had a make-good provision of $2.9 million and $7.1 million, respectively. The Company does not have any contracts with customers with terms in excess of one year that are noncancellable as of September 30, 2021. Agreements with a duration less than one year are not included within this disclosure as the Company elected to use the practical expedient in ASC 606-10-50-14 for those contracts. In addition, the Company’s other contracts longer than one year that are cancellable are not included within this disclosure. Disaggregation of Revenue The Company disaggregates revenue based upon the type of customer: national and regional, local and beverage concessionaire. This method of disaggregation is in alignment with how revenue is reviewed by management and discussed with, and historically disclosed to investors. The following table summarizes revenue from contracts with customers for the three and nine months ended September 30, 2021 and September 24, 2020 (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 National and regional advertising revenue $ 22.9 $ 3.5 $ 35.5 $ 55.0 Local advertising revenue 5.4 2.3 9.6 14.0 Founding member advertising revenue from beverage 3.4 0.2 6.0 5.7 Total revenue $ 31.7 $ 6.0 $ 51.1 $ 74.7 Deferred Revenue and Unbilled Accounts Receivable The changes in deferred revenue for the nine months ended September 30, 2021 were as follows (in millions): Nine Months Ended September 30, 2021 Balance at beginning of period $ (5.1) New contract liabilities (7.7) Performance obligations satisfied 1.7 Balance at end of period $ (11.1) As of September 30, 2021 and December 31, 2020, the Company had $3.3 million and $2.5 million in unbilled accounts receivable, respectively. Allowance for Doubtful Accounts The allowance for doubtful accounts balance is determined separately for each pool of the Company's receivables with similar risk characteristics. The Company has determined that two pools, national customers and local/ regional customers, is appropriate. The changes within the allowance for doubtful accounts balances for the nine months ended September 30, 2021 were as follows (in millions): Nine Months Ended September 30, Allowance for National Customer Receivables Allowance for Local/ Regional Customer Receivables Balance at beginning of period $ 0.2 $ 2.1 Provision for bad debt 0.1 (0.2) Write-offs, net — (0.5) Balance at end of period $ 0.3 $ 1.4

Loss Per Share

Loss Per Share	3 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Loss Per Share	PER SHARE Basic loss per share is computed on the basis of the weighted average number of common shares outstanding. Diluted loss per share is computed on the basis of the weighted average number of common shares outstanding plus the effect of potentially dilutive common stock options, restricted stock and restricted stock units using the treasury stock method. The components of basic and diluted loss per NCM, Inc. share are as follows: Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Net loss attributable to NCM, Inc. (in millions) $ (15.2) $ (12.7) $ (57.3) $ (30.2) Weighted average shares outstanding: Basic 80,359,723 78,016,737 79,652,152 77,925,552 Add: Dilutive effect of stock options, restricted stock and — — — — Diluted 80,359,723 78,016,737 79,652,152 77,925,552 Loss per NCM, Inc. share: Basic $ (0.19) $ (0.16) $ (0.72) $ (0.39) Diluted $ (0.19) $ (0.16) $ (0.72) $ (0.39) The effect of 86,188,344, 84,531,328, 85,601,326 and 83,678,699 weighted average exchangeable NCM LLC common units held by the founding members for the three months ended September 30, 2021 and September 24, 2020 and nine months ended September 30, 2021 and September 24, 2020, respectively, have been excluded from the calculation of diluted weighted average shares and loss per NCM, Inc. share as they were anti-dilutive. NCM LLC common units do not participate in dividends paid on NCM, Inc.’s common stock. In addition, there were 4,797,243, 4,484,702, 4,797,243 and 4,484,702, stock options and non-vested (restricted) shares for the three months ended September 30, 2021 and September 24, 2020 and nine months ended September 30, 2021 and September 24, 2020, respectively, excluded from the calculation as they were anti-dilutive. The Company’s non-vested (restricted) shares do not meet the definition of a participating security as the dividends will not be paid if the shares do not vest.

Intangible Assets

Intangible Assets	3 Months Ended
	Sep. 30, 2021
Goodwill and Intangible Assets Disclosure [Abstract]
Intangible Assets	INTANGIBLE ASSETS Intangible assets consist of contractual rights to provide the Company’s services within the theaters of the founding members and network affiliates and are stated at cost, net of accumulated amortization. The Company’s intangible assets with its founding members are recorded at the fair market value of NCM, Inc.’s publicly traded stock as of the date on which the common membership units were issued. The NCM LLC common membership units are fully convertible into NCM, Inc.’s common stock. In addition, the Company records intangible assets for up-front fees paid to network affiliates upon commencement of a network affiliate agreement. The Company’s intangible assets have a finite useful life and the Company amortizes the assets over the remaining useful life corresponding with the ESAs or the term of the network affiliate agreement. During 2020, the Company determined that recent adverse changes in macroeconomic trends, reduced cash flows as a consequence of the temporary, and sometimes permanent, closure of the theaters within the Company's network in response to the COVID-19 Pandemic, a decline in the fair value of NCM LLC’s debt and the further sustained decline in the market price of NCM, Inc.'s common stock constituted a triggering event for its intangible assets under Accounting Standards Certification No. 360, Impairment and Disposal of Long-Lived Assets. Management considered possible scenarios in a probability-weighted estimated future undiscounted cash flow analysis, including the potential of further delays in major motion picture releases, a recurrence of the temporary theater closures and other potential adverse impacts to NCM LLC's founding members' and affiliates' financial liquidity related to the COVID-19 Pandemic. The estimated future cash flows from the affiliate agreements and ESAs calculated within the probability-weighted analyses were in excess of the net book value of these intangible assets and no impairment charges were recorded in the year ended December 31, 2020. Such analysis required management to make estimates and assumptions based on historical data and consideration of future market conditions. Given the uncertainty inherent in any projection, heightened by the possibility of unforeseen additional effects of the COVID-19 Pandemic, including potential adverse impacts to NCM LLC's founding members' and affiliates' financial liquidity, actual results may differ from the estimates and assumptions used, or conditions may change, which could result in impairment charges in the future. Common Unit Adjustments —In accordance with NCM LLC’s Common Unit Adjustment Agreement with its founding members, on an annual basis NCM LLC determines the amount of common membership units to be issued to or returned by the founding members based on theater additions, new builds or dispositions during the previous year. In the event a founding member does not have sufficient common membership units to return, the adjustment is satisfied in cash in an amount calculated pursuant to NCM LLC’s Common Unit Adjustment Agreement. In addition, NCM LLC’s Common Unit Adjustment Agreement requires that a Common Unit Adjustment occur for a specific founding member if its acquisition or disposition of theaters, in a single transaction or cumulatively since the most recent Common Unit Adjustment, results in an attendance increase or decrease in excess of two percent of the annual total attendance at the prior adjustment date. During the first quarter of 2021, NCM LLC issued 3,047,582 common membership units to two founding members for the rights to exclusive access to the theater screens and attendees added, net of dispositions, to NCM LLC’s network during the 2020 fiscal year and calculated a negative common membership unit adjustment for one founding member resulting in a receivable included within “Other assets and prepaid expenses” on the unaudited Consolidated Balance Sheet. The net impact as a result of the Common Unit Adjustment to the intangible asset was $4.8 million during the first quarter of 2021. During the first quarter of 2020, NCM LLC issued 3,022,959 common membership units to its founding members for the rights to exclusive access to the theater screens and attendees added, net of dispositions by the founding members to NCM LLC’s network during the 2019 fiscal year and NCM LLC recorded a net intangible asset of $10.5 million during the first quarter of 2020 as a result of the Common Unit Adjustment. Integration Payments and Other Encumbered Theater Payments —If an existing on-screen advertising agreement with an alternative provider is in place with respect to any acquired theaters (“encumbered theaters”), the founding members may elect to receive common membership units related to those encumbered theaters in connection with the Common Unit Adjustment. If the founding members make this election, then they are required to make payments on a quarterly basis in arrears in accordance with certain run-out provisions pursuant to the ESAs (“integration payments”). Because the Carmike Cinemas, Inc. (“Carmike”) theaters acquired by AMC are subject to an existing on-screen advertising agreement with an alternative provider, AMC makes integration payments to NCM LLC. The integration payments will continue until the earlier of (i) the date the theaters are transferred to NCM LLC’s network or (ii) the expiration of the ESA. Integration payments are calculated based upon the advertising cash flow that the Company would have generated if it had exclusive access to sell advertising in the theaters with pre-existing advertising agreements. The ESAs additionally entitle NCM LLC to payments related to the founding members’ on-screen advertising commitments under their beverage concessionaire agreements for encumbered theaters. These payments are also accounted for as a reduction to the intangible assets. During the three months ended September 30, 2021 and September 24, 2020 and nine months ended September 30, 2021 and September 24, 2020, the Company recorded a reduction to net intangible assets of $0.2 million, $0.0 million, $0.3 million and $1.4 million, respectively,

Related Party Transactions

Related Party Transactions	9 Months Ended
	Sep. 30, 2021
Related Party Transactions [Abstract]
Related Party Transactions	RELATED PARTY TRANSACTIONS Founding Member Transactions —In connection with NCM, Inc.’s initial public offering (“IPO”), the Company entered into several agreements to define and regulate the relationships among NCM, Inc., NCM LLC and the founding members which are outlined below. AMC has owned less than 5% of NCM LLC since July 2018 and is no longer a related party. AMC remains a party to the ESA, Common Unit Adjustment Agreement, Tax Receivable Agreement (“TRA”) and certain other original agreements and is a member under the terms of the NCM LLC operating agreement, subject to fulfilling the requirements of Section 3.1 of the NCM LLC operating agreement. AMC will continue to participate in the annual Common Unit Adjustment and receive available cash distributions or allocation of earnings and losses in NCM LLC (as long as its ownership is greater than zero), TRA payments and theater access fees. Further, AMC will continue to pay beverage revenue, among other things. AMC's ownership percentage does not impact future integration payments and other encumbered theater payments owed to NCM LLC by AMC. As of September 30, 2021, AMC’s ownership was 0.0%. The material agreements with the founding members are as follows: • ESAs. Under the ESAs, NCM LLC is the exclusive provider within the United States of advertising services in the founding members’ theaters (subject to pre-existing contractual obligations and other limited exceptions for the benefit of the founding members). The advertising services include the use of the digital content network (“DCN”) equipment required to deliver the on-screen advertising and other content included in the Noovie ® pre-show, use of the LEN and rights to sell and display certain lobby promotions. Further, NCM LLC’s founding members have elected to purchase 30 seconds to 60 seconds of advertising, out of the 90 seconds allowed for under the ESA, in the Noovie pre-show to satisfy the founding members’ on-screen advertising commitments under their beverage concessionaire agreements. In consideration for access to the founding members’ theaters, theater patrons, the network equipment required to display on-screen and LEN video advertising and the use of theaters for lobby promotions, the founding members receive a monthly theater access fee. In conjunction with the 2019 ESA Amendments, NCM LLC agreed to pay Cinemark and Regal incremental monthly theater access fees and, subject to NCM LLC's use of specified inventory, a revenue share in consideration for NCM LLC's access to certain on-screen advertising inventory after the advertised showtime of a feature film beginning November 1, 2019, and the underlying term of the ESAs were extended until 2041. The ESAs and 2019 ESA Amendments with Cinemark and Regal are considered leases with related parties under ASC 842. • Common Unit Adjustment Agreement. The Common Unit Adjustment Agreement provides a mechanism for increasing or decreasing the membership units held by the founding members based on the acquisition or construction of new theaters or sale or closure of theaters that are operated by each founding member and included in NCM LLC’s network. • Tax Receivable Agreement. The TRA provides for the effective payment by NCM, Inc. to the founding members of 90% of the amount of cash savings, if any, in U.S. federal, state and local income tax or franchise tax that is actually realized as a result of certain increases in NCM, Inc.’s proportionate share of tax basis in NCM LLC’s tangible and intangible assets resulting from the IPO and related transactions. • Software License Agreement. At the date of the Company’s IPO, NCM LLC was granted a perpetual, royalty-free license from NCM LLC’s founding members to use certain proprietary software that existed at the time for the delivery of digital advertising and other content through the DCN to screens in the U.S. NCM LLC has made improvements to this software since the IPO date and NCM LLC owns those improvements, except for improvements that were developed jointly by NCM LLC and NCM LLC’s founding members, if any. The following tables provide summaries of the transactions between the Company and the related party founding members (in millions): Three Months Ended Nine Months Ended Included in the unaudited Condensed Consolidated Statements of Income: September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Revenue: Beverage concessionaire revenue (included in advertising revenue) (1) $ 2.7 $ 0.2 $ 4.7 $ 4.5 Operating expenses: Theater access fee and revenue share to founding members (2) $ 11.4 $ 1.0 $ 19.8 $ 13.6 Selling and marketing costs (3) $ — $ — $ — $ 0.1 Advertising operating costs (3) $ — $ 0.4 $ 0.1 $ 0.4 ________________________________________ (1) For the three and nine months ended September 30, 2021 and September 24, 2020, Cinemark and Regal purchased 60 seconds of on-screen advertising time from NCM LLC to satisfy their obligations under their beverage concessionaire agreements at a 30 seconds equivalent CPM rate specified by the ESA. No beverage revenue was generated for the period of time that the theaters within NCM LLC's network were temporarily closed as there were no attendees upon which beverage revenue is generated and beverage revenue was limited for periods of reduced attendance due to the COVID-19 Pandemic. (2) Comprised of payments per theater attendee, payments per digital screen with respect to the founding member theaters included in the Company’s network and payments for access to higher quality digital cinema equipment. Following the 2019 ESA Amendments this also includes payments to Cinemark and Regal for their share of the revenue from the sale of an additional single unit that is either 30 or 60 seconds of the Noovie pre-show in the trailer position directly prior to the “attached” trailers preceding the feature film (the “Platinum Spot”). There was no theater access fee or revenue share expense for the period of time that the theaters within NCM LLC's network were temporarily closed and reduced fees for periods of reduced attendance due to the COVID-19 Pandemic. (3) Includes purchase of movie tickets, concession products, rental of theater space primarily for marketing to NCM LLC’s advertising clients and other payments made to the founding members in the ordinary course of business. As of Included in the unaudited Condensed Consolidated Balance Sheets: September 30, 2021 December 31, 2020 Common unit adjustments and ESA extension costs, net of amortization and integration payments (included in intangible assets) (1) $ 596.4 $ 608.1 Current payable to founding members under tax receivable agreement (2) $ — $ 0.6 Long-term payable to founding members under tax receivable agreement (2) $ 21.3 $ 23.7 Other payables to founding members (3) $ — $ 0.6 (1) Refer to Note 4— Intangible Assets for further information on common unit adjustments and integration payments. This balance includes common unit adjustments issued to all of the founding members (including AMC) as the Company's intangible balance is considered one asset inclusive of all common unit adjustment activity. (2) The Company paid Cinemark and Regal $0.2 million and $0.4 million during 2021 and $3.2 million and $5.8 million during 2020, respectively, in payments pursuant to the TRA which were for the 2019 tax year. (3) Includes other payments made to the founding members in the ordinary course of business. Pursuant to the terms of the NCM LLC operating agreement in place since the completion of the Company’s IPO, NCM LLC is required to make mandatory distributions on a proportionate basis to its members of available cash, as defined in the NCM LLC operating agreement, on a quarterly basis in arrears. Mandatory distributions of available cash for the three and nine months ended September 30, 2021 and September 24, 2020 were as follows (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Cinemark $ — $ — $ — $ 2.1 Regal — — — 2.2 Total distributions to related parties — — — 4.3 NCM, Inc. — — — 4.1 Total $ — $ — $ — $ 8.4 Due to the temporary closure of the theaters within NCM LLC's network during a portion of the nine months ended September 30, 2021 and decrease in 2021 in-theater advertising revenue, the mandatory distributions of available cash by NCM LLC to its related party founding members and NCM, Inc. for the three months ended September 30, 2021 were calculated as negative $23.2 million (including negative $6.0 million for Cinemark, negative $6.0 million for Regal and negative $11.2 million for NCM, Inc.). Therefore, there will be no payment made for the third quarter of 2021. The mandatory distributions of available cash by NCM LLC for the nine months ended September 30, 2021 were calculated as negative $93.3 million (including negative $24.2 million for Cinemark, negative $24.1 million for Regal and negative $45.0 million for NCM, Inc.). Under the terms of the NCM LLC operating agreement, these negative amounts will be netted against future positive available cash distributions after the extended covenant waiver holiday, contingent upon the Company's compliance with the covenants outlined within the Credit Agreement Second Amendment defined within Note 6— Borrowings and in accordance with the NCM LLC operating agreement. Amounts due to related party founding members, net, as of September 30, 2021 were comprised of the following (in millions): Cinemark Regal Total Theater access fees and revenue share, net of beverage revenues and other $ 1.2 $ 1.6 $ 2.8 Total amounts due to founding members, net $ 1.2 $ 1.6 $ 2.8 Amounts due to related party founding members, net as of December 31, 2020 were comprised of the following (in millions): Cinemark Regal Total Theater access fees and revenue share, net of beverage revenues and other $ 0.6 $ 0.9 $ 1.5 Integration payments due from founding members (0.1) (0.1) (0.2) Total amounts due to founding members, net $ 0.5 $ 0.8 $ 1.3 AC JV, LLC Transactions —In December 2013, NCM LLC sold its Fathom Events business to a newly formed limited liability company, AC JV, LLC, owned 32% by each of the founding members and 4% by NCM LLC. The Company accounts for its investment in AC JV, LLC under the equity method of accounting in accordance with ASC 323-30, Investments—Equity Method and Joint Ventures

Income Taxes

Income Taxes	3 Months Ended
	Sep. 30, 2021
Income Tax Disclosure [Abstract]
Income Taxes	INCOME TAXES Changes in the Company’s Effective Tax Rate —The Company recorded income tax expense of $0.0 million for the nine months ended September 30, 2021 compared to an income tax benefit of $7.7 million for the nine months ended September 24, 2020 resulting in an effective tax rate of 0.0% for the nine months ended September 30, 2021 as compared to 20.4% for the nine months ended September 24, 2020. The Company recorded a full valuation allowance on its net deferred tax assets as of December 31, 2020 following the determination it was more-likely-than-not that the Company will not be able to

Commitments and Contingencies

Commitments and Contingencies	3 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	COMMITMENTS AND CONTINGENCIES Legal Actions —The Company is subject to claims and legal actions in the ordinary course of business. The Company believes such claims will not have a material effect individually or in the aggregate on its financial position, results of operations or cash flows. Operating Commitments - Facilities —The Company has entered into operating lease agreements for its corporate headquarters and other regional offices. The Company has right-of-use (“ROU”) assets of $19.2 million and short-term and long-term lease liabilities of $2.0 million and $21.0 million, respectively, on the balance sheet as of September 30, 2021 for all material leases with terms longer than twelve months. These balances are included within “Other assets”, “Other current liabilities” and “Other liabilities”, respectively, on the unaudited Condensed Consolidated Balance Sheets. As of September 30, 2021, the Company had a weighted average remaining lease term of 8.4 years on these leases. When measuring the ROU assets and lease liabilities recorded, the Company utilized its incremental borrowing rate in order to determine the present value of the lease payments as the leases do not provide an implicit rate. The Company used the rate of interest that it would have paid to borrow on a collateralized basis over a similar term for an amount equal to the lease payments in a similar economic environment. As of September 30, 2021, the Company’s weighted average annual discount rate used to establish the ROU assets and lease liabilities was 7.36%. During the three and nine months ended September 30, 2021 and September 24, 2020, the Company recognized the following components of total lease cost (in millions). These costs are presented within “Selling and marketing costs” and “Administrative and other costs” within the unaudited Condensed Consolidated Statements of Income depending upon the nature of the use of the facility. Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Operating lease cost $ 0.8 $ 0.9 $ 2.6 $ 2.7 Variable lease cost 0.2 0.1 0.4 0.4 Total lease cost $ 1.0 $ 1.0 $ 3.0 $ 3.1 The Company made total lease payments of $0.9 million, $0.9 million, $2.9 million and $2.7 million during the three months ended September 30, 2021 and September 24, 2020 and nine months ended September 30, 2021 and September 24, 2020, respectively. These payments are included within cash flows from operating activities within the unaudited Condensed Consolidated Statement of Cash Flows. Operating Commitments - ESAs and Affiliate Agreements —The Company has entered into long-term ESAs with the founding members and multi-year agreements with certain network affiliates, or third-party theater circuits. The ESAs and network affiliate agreements grant NCM LLC exclusive rights in their theaters to sell advertising, subject to limited exceptions. The Company recognizes intangible assets upon issuance of membership units to the founding members in accordance with NCM LLC’s Common Unit Adjustment Agreement and upfront cash payments to the affiliates for the contractual rights to provide the Company’s services within their theaters as further discussed within Note 4 - Intangible Assets . These ESAs and network affiliate agreements are considered leases under ASC 842 once the asset is identified and the period of control is determined upon the scheduling of the showtimes by the exhibitors, typically one week prior to the showtime. As such, the leases are considered short-term in nature, specifically less than one month. Within ASC 842, leases with terms of less than one month are exempt from the majority of the accounting and disclosure requirements, including disclosure of short-term lease expense. No ROU assets or lease liabilities were recognized for these agreements and no change to the balance sheet presentation of the intangible assets was necessary. However, the amortization of these intangible assets is considered lease expense and is presented within “Amortization of intangibles recorded for network theater screen leases” within the unaudited Condensed Consolidated Statement of Income. In consideration for NCM LLC’s access to the founding members’ theater attendees for on-screen advertising and use of lobbies and other space within the founding members’ theaters for the LEN and lobby promotions, the founding members receive a monthly theater access fee under the ESAs. The theater access fee is composed of a fixed payment per patron, a fixed payment per digital screen (connected to the DCN) and a fee for access to higher quality digital cinema equipment. The payment per theater patron increases by 8% every five years, with this next increase occurring in fiscal year 2022, and the payment per digital screen and for digital cinema equipment increases annually by 5%. The theater access fee paid in the aggregate to all founding members cannot be less than 12% of NCM LLC’s aggregate advertising revenue (as defined in the ESA), or it will be adjusted upward to reach this minimum payment. As of September 30, 2021 and December 31, 2020, the Company had no liabilities recorded for the minimum payment, as the theater access fee was in excess of the minimum. Following the 2019 ESA Amendments, Cinemark and Regal receive an additional monthly theater access fee that began on November 1, 2019 in consideration for NCM LLC's access to certain on-screen advertising inventory after the advertised showtime of a feature film. These fees are also based upon a fixed payment per patron: (i) beginning at $0.025 per patron on November 1, 2019, (ii) $0.0375 per patron beginning on November 1, 2020, (iii) $0.05 per patron beginning on November 1, 2021, (iv) $0.052 per patron beginning on November 1, 2022 and (v) increase 8% every five years beginning November 1, 2027. Additionally, following the 2019 ESA Amendments, beginning on November 1, 2019, NCM LLC is entitled to display the Platinum Spot, an additional single unit that is either 30 or 60 seconds of the Noovie® pre-show in the trailer position directly prior to the “attached” trailers preceding the feature film. The “attached” trailers are those provided by studios to Cinemark and Regal that are with the feature film, which is at least one trailer, but sometimes two or more trailers. In consideration for the utilization of the theaters for the Platinum Spots, Cinemark and Regal are entitled to receive 25% of all revenue generated for the actual display of Platinum Spots in their applicable theaters, subject to a specified minimum. If NCM LLC runs advertising in more than one concurrent advertisers’ Platinum Spot for any portion of the network over a period of time, then NCM LLC will be required to satisfy a minimum average CPM for that period of time. The Company did not owe the founding members any theater access fees or any Platinum Spot revenue share when the theaters were not displaying the Company's pre-show or when the Company did not have access to the theaters. As such, the Company did not owe these fees for the period of time the founding members' theaters were temporarily closed due to the COVID-19 Pandemic and future fees will be reduced if attendance remains lower than historical levels. The digital screen fee is calculated based upon average screens in use during each month. No digital screen fees were incurred for the period of time the founding member's theaters were temporarily closed due to the COVID-19 Pandemic and future fees may be reduced for months where screens are in use for only part of the month. The network affiliates compensation is considered variable lease expense and varies by circuit depending upon the agreed upon terms of the network affiliate agreement. The majority of agreements are centered around a revenue share where an agreed upon percentage of the advertising revenue received from a theater’s attendance is paid to the circuit. As part of the network affiliate agreements entered into in the ordinary course of business under which the Company sells advertising for display in various network affiliate theater chains, the Company has agreed to certain minimum revenue guarantees on a per attendee basis. If a network affiliate achieves the attendance set forth in their respective agreement, the Company has guaranteed minimum revenue for the network affiliate per attendee if such amount paid under the revenue share arrangement is less than its guaranteed amount. As of September 30, 2021, the maximum potential amount of future payments the Company could be required to make pursuant to the minimum revenue guarantees is $105.4 million over the remaining terms of the network affiliate agreements. These minimum guarantees relate to various affiliate agreements ranging in term from three years to twenty years, prior to any renewal periods of which some are at the option of the Company. The Company accrued $0.2 million and $0.0 million related to affiliate agreements with guaranteed minimums in excess of the revenue share agreement as of September 30, 2021 and December 31, 2020, respectively. As the guaranteed minimums are based upon agreed upon minimum attendance or affiliate revenue levels, the Company did not incur minimum revenue share fees during the period of time the respective affiliate's theaters were temporarily closed due to the COVID-19 Pandemic and will not so long as an affiliate's minimum theater attendance or revenue levels are not met by the affiliate.

Subsequent Event

Subsequent Event	3 Months Ended
	Sep. 30, 2021
Subsequent Events [Abstract]
Subsequent Event	SUBSEQUENT EVENTOn November 8, 2021, the Company declared a cash dividend of $0.05 per share (approximately $4.0 million) on each share of the Company’s common stock (not including outstanding restricted stock which will accrue dividends until the shares vest) to stockholders of record on November 22, 2021 to be paid on December 7, 2021.

The Company (Policies)

The Company (Policies)	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020
Accounting Policies [Abstract]
Basis of Presentation	Basis of Presentation The Company has prepared the unaudited Condensed Consolidated Financial Statements and related notes of NCM, Inc. in accordance with accounting principles generally accepted in the United States of America (“GAAP”) for interim financial information and the rules and regulations of the Securities and Exchange Commission (“SEC”). Certain information and footnote disclosures typically included in an annual report have been condensed or omitted for this quarterly report. The balance sheet as of December 31, 2020 is derived from the audited financial statements of NCM, Inc. Therefore, the unaudited Condensed Consolidated Financial Statements should be read in conjunction with the audited Consolidated Financial Statements and notes thereto included in the Company’s annual report on Form 10-K filed for the fiscal year ended December 31, 2020. In the opinion of management, all adjustments necessary to present fairly in all material respects the financial position, results of operations and cash flows for all periods presented have been made. Historically, the Company’s business has been seasonal and for this and other reasons operating results for interim periods have not been indicative of the Company’s full year results or future performance. Given the impact of the COVID-19 Pandemic during 2021, management expects the Company's 2021 quarterly results to vary from historical trends. As a result of the various related party agreements discussed in Note 5— Related Party Transactions , the operating results as presented are not necessarily indicative of the results that might have occurred if all agreements were with non-related third parties. The Company manages its business under one reportable segment of advertising.
Estimates	Estimates —The preparation of the financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Significant estimates include those related to the reserve for uncollectible accounts receivable, share-based compensation and income taxes. Actual results could differ from estimates. Going Concern — The accompanying unaudited Condensed Consolidated Financial Statements are prepared in accordance with GAAP applicable to a going concern, which contemplates the realization of assets and the satisfaction of liabilities in the normal course of business. Based on the Company’s current financial position and liquidity sources, including current cash balances, and forecasted future cash flows, management believes the Company can meet its operating obligations as they become due, including all currently scheduled interest and debt service payments within one year following the date that these financial statements are issued. Refer to Note 6— Borrowings for information on the Company’s debt obligations, including a current waiver of certain financial covenants. However, the Company does not expect to meet its financial covenants within one year following the date that these financial statements are issued. If these financial covenants are not met a majority of the lenders of the Senior Secured Credit Facility are permitted under the Credit Agreement to accelerate the debt which could also result in a cross-default under NCM LLC’s senior notes. Considering current liquidity sources, the Company would not be able to repay the Company’s total outstanding debt balance. These conditions and events raise substantial doubt about the Company’s ability to continue as a going concern. In light of this, the Company is actively pursuing a number of options including amending its Senior Secured Credit Facility to extend a waiver of these financial covenants and obtaining additional financing either through a loan from third party lenders or NCM, Inc. Management expects to conclude one of these alternatives in the very near term; however, there can be no assurance that the Company will be successful in completing any of these options. As a result, management’s plan cannot be considered probable and thus does not alleviate the substantial doubt about the Company’s ability to continue as a going concern. The unaudited Condensed Consolidated Financial Statements do not include any adjustments relating to the recoverability and classification of recorded asset amounts or the amounts and classification of liabilities that might result from the outcome of this uncertainty.
Revenue Recognition	Revenue Recognition—The Company derives revenue principally from the advertising business, which includes advertising through its on-screen cinema network, lobby network (LEN) and lobby promotions in theaters, and on websites, mobile applications and out-of-home locations owned by NCM LLC and other companies. Revenue is recognized over time as the customer receives the benefits provided by NCM LLC’s advertising services and the Company has the right to payment for performance to date. The Company considers the terms of each arrangement to determine the appropriate accounting treatment.
Concentration of Credit Risk and Significant Customers		Concentration of Credit Risk and Significant Customers —The risk of credit loss related to the Company's trade receivables and unbilled receivables balances is accounted for through the allowance for doubtful accounts, a contra asset account which reduces the net receivables balance. The allowance for doubtful accounts balance is determined by pooling the Company's receivables with similar risk characteristics, specifically by type of customer (national or local/ regional) and then age of receivable, and applying historical write off percentages to these pools in order to determine the amount of expected credit losses as of the balance sheet date. National receivables are with large advertising agencies with strong reputations in the advertising industry and clients with stable financial positions and good credit ratings, represent larger receivables balances per customer and have significantly lower historical and expected credit loss patterns. Local and regional receivables are with smaller companies sometimes with less credit history and represent smaller receivable balances per customer and higher historical and expected credit loss patterns. The Company has smaller contracts with many local clients that are not individually significant. The Company also considers current economic conditions and trends to determine whether adjustments to historical loss rates are necessary. The Company also reserves for specific receivable balances that it expects to write off based on known concerns regarding the financial health of the customer. Receivables are written off when management determines amounts are uncollectible. The Company had one agency through which the Company sourced advertising revenue that accounted for 22.0% and 10.1% of the Company's gross outstanding receivable balance as of September 30, 2021 and December 31, 2020, respectively. During the three months ended September 30, 2021 and September 24, 2020, the Company had one customer that accounted for 11.8% and 28.8% of the Company's revenue, respectively. During the nine months ended September 30, 2021 and September 24, 2020, the Company had one customer that accounted for 11.6% and 10.6% of revenue, respectively.
Share-Based Compensation	Share-Based Compensation—The Company has issued stock options, restricted stock, and restricted stock units to certain employees and its independent directors. The restricted stock and restricted stock unit grants for Company management vest upon the achievement of Company performance measures and/or service conditions, while non-management grants vest only upon the achievement of service conditions. Compensation expense of restricted stock and restricted stock units that vest upon the achievement of Company performance measures is based on management’s financial projections and the probability of achieving the projections, which require considerable judgment. A cumulative adjustment is recorded to share-based compensation expense in periods that management changes its estimate of the number of shares of restricted stock and restricted stock units expected to vest. Ultimately, the Company adjusts the expense recognized to reflect the actual vested shares following the resolution of the performance conditions. Dividends are accrued when declared on unvested restricted stock and restricted stock units that are expected to vest and are only paid with respect to shares that actually vest. On February 28, 2021 and March 2, 2021, the Company’s Board of Directors approved certain modifications to equity awards awarded under the Company’s 2016 Equity Incentive Plan to adjust performance metrics, vesting amount and future performance goals in light of the COVID-19 Pandemic resulting in incremental share-based compensation expense of $0.2 million and $1.7 million for the three months and nine months ended September 30, 2021, respectively. During the three months ended September 30, 2021 and September 24, 2020 and the nine months ended September 30, 2021 and September 24, 2020, 268,782, 50,052, 1,394,321 and 607,733 shares of restricted stock and restricted stock units vested, respectively.
Consolidation	Consolidation —NCM, Inc. consolidates the accounts of NCM LLC under the provisions of ASC 810, Consolidation . The following table presents the changes in NCM, Inc.’s equity resulting from net income attributable to NCM, Inc. and transfers to or from noncontrolling interests (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Net loss attributable to NCM, Inc. $ (15.2) $ (12.7) $ (57.3) $ (30.2) NCM LLC equity issued for purchase of intangible asset — — 6.8 5.0 Income tax and other impacts of subsidiary ownership changes 0.3 — 1.2 (3.9) NCM LLC common membership unit redemption — — (6.6) — Issuance of shares to founding members — — 6.6 — Change from net loss income attributable to NCM, Inc. and $ (14.9) $ (12.7) $ (49.3) $ (29.1)
Recently Adopted Accounting Pronouncements	Recently Adopted Accounting Pronouncements During the first quarter of 2021, the Company adopted Accounting Standards Update 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes (“ASU 2019-12”), which removes the following exceptions for the Company to analyze in a given period: the exception to the incremental approach for intraperiod tax allocation; the exception to accounting for basis differences when there are ownership changes in foreign investments; and the exception in interim periods income tax accounting for year-to-date losses that exceed anticipated losses. The Company’s adoption of ASU 2019-12 did not have a material impact on the unaudited Condensed Consolidated Financial Statements or notes thereto.
Recently Issued Accounting Pronouncements	Recently Issued Accounting Pronouncements In March 2020, the FASB issued Accounting Standards Update No. 2020-04, Reference Rate Reform (“ASU 2020-04”), which provides temporary optional guidance to companies impacted by the transition away from the London Interbank Offered Rate (“LIBOR”). The guidance provides certain expedients and exceptions to applying GAAP in order to lessen the potential accounting burden when contracts, hedging relationships, and other transactions that reference LIBOR as a benchmark rate are modified. This guidance is effective upon issuance and expires on December 31, 2022. The Company is currently assessing the impact of the LIBOR transition and ASU 2020-04 on the Company’s unaudited Condensed Consolidated Financial Statements. The Company has considered all other recently issued accounting pronouncements and does not believe the adoption of such pronouncements will have a material impact on its unaudited Condensed Consolidated Financial Statements or notes thereto.

The Company (Tables)

The Company (Tables)	3 Months Ended
	Sep. 30, 2021
Accounting Policies [Abstract]
Changes In Equity	The following table presents the changes in NCM, Inc.’s equity resulting from net income attributable to NCM, Inc. and transfers to or from noncontrolling interests (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Net loss attributable to NCM, Inc. $ (15.2) $ (12.7) $ (57.3) $ (30.2) NCM LLC equity issued for purchase of intangible asset — — 6.8 5.0 Income tax and other impacts of subsidiary ownership changes 0.3 — 1.2 (3.9) NCM LLC common membership unit redemption — — (6.6) — Issuance of shares to founding members — — 6.6 — Change from net loss income attributable to NCM, Inc. and $ (14.9) $ (12.7) $ (49.3) $ (29.1)

Revenue from Contracts with C_2

Revenue from Contracts with Customers (Tables)	3 Months Ended
	Sep. 30, 2021
Revenue from Contract with Customer [Abstract]
Summary of Revenue from Contracts with Customers	The following table summarizes revenue from contracts with customers for the three and nine months ended September 30, 2021 and September 24, 2020 (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 National and regional advertising revenue $ 22.9 $ 3.5 $ 35.5 $ 55.0 Local advertising revenue 5.4 2.3 9.6 14.0 Founding member advertising revenue from beverage 3.4 0.2 6.0 5.7 Total revenue $ 31.7 $ 6.0 $ 51.1 $ 74.7
Summary of Changes in Deferred Revenue	The changes in deferred revenue for the nine months ended September 30, 2021 were as follows (in millions): Nine Months Ended September 30, 2021 Balance at beginning of period $ (5.1) New contract liabilities (7.7) Performance obligations satisfied 1.7 Balance at end of period $ (11.1)
Schedule of Allowance for Doubtful Accounts	The changes within the allowance for doubtful accounts balances for the nine months ended September 30, 2021 were as follows (in millions): Nine Months Ended September 30, Allowance for National Customer Receivables Allowance for Local/ Regional Customer Receivables Balance at beginning of period $ 0.2 $ 2.1 Provision for bad debt 0.1 (0.2) Write-offs, net — (0.5) Balance at end of period $ 0.3 $ 1.4

Loss Per Share (Tables)

Loss Per Share (Tables)	3 Months Ended
	Sep. 30, 2021
Earnings Per Share [Abstract]
Schedule of Loss Per Share, Basic and Diluted	The components of basic and diluted loss per NCM, Inc. share are as follows: Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Net loss attributable to NCM, Inc. (in millions) $ (15.2) $ (12.7) $ (57.3) $ (30.2) Weighted average shares outstanding: Basic 80,359,723 78,016,737 79,652,152 77,925,552 Add: Dilutive effect of stock options, restricted stock and — — — — Diluted 80,359,723 78,016,737 79,652,152 77,925,552 Loss per NCM, Inc. share: Basic $ (0.19) $ (0.16) $ (0.72) $ (0.39) Diluted $ (0.19) $ (0.16) $ (0.72) $ (0.39)

Related Party Transactions (Tab

Related Party Transactions (Tables)	3 Months Ended
	Sep. 30, 2021	Sep. 24, 2020
Related Party Transactions [Abstract]
Schedule of Related Party Transactions		The following tables provide summaries of the transactions between the Company and the related party founding members (in millions): Three Months Ended Nine Months Ended Included in the unaudited Condensed Consolidated Statements of Income: September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Revenue: Beverage concessionaire revenue (included in advertising revenue) (1) $ 2.7 $ 0.2 $ 4.7 $ 4.5 Operating expenses: Theater access fee and revenue share to founding members (2) $ 11.4 $ 1.0 $ 19.8 $ 13.6 Selling and marketing costs (3) $ — $ — $ — $ 0.1 Advertising operating costs (3) $ — $ 0.4 $ 0.1 $ 0.4 ________________________________________ (1) For the three and nine months ended September 30, 2021 and September 24, 2020, Cinemark and Regal purchased 60 seconds of on-screen advertising time from NCM LLC to satisfy their obligations under their beverage concessionaire agreements at a 30 seconds equivalent CPM rate specified by the ESA. No beverage revenue was generated for the period of time that the theaters within NCM LLC's network were temporarily closed as there were no attendees upon which beverage revenue is generated and beverage revenue was limited for periods of reduced attendance due to the COVID-19 Pandemic. (2) Comprised of payments per theater attendee, payments per digital screen with respect to the founding member theaters included in the Company’s network and payments for access to higher quality digital cinema equipment. Following the 2019 ESA Amendments this also includes payments to Cinemark and Regal for their share of the revenue from the sale of an additional single unit that is either 30 or 60 seconds of the Noovie pre-show in the trailer position directly prior to the “attached” trailers preceding the feature film (the “Platinum Spot”). There was no theater access fee or revenue share expense for the period of time that the theaters within NCM LLC's network were temporarily closed and reduced fees for periods of reduced attendance due to the COVID-19 Pandemic. (3) Includes purchase of movie tickets, concession products, rental of theater space primarily for marketing to NCM LLC’s advertising clients and other payments made to the founding members in the ordinary course of business. As of Included in the unaudited Condensed Consolidated Balance Sheets: September 30, 2021 December 31, 2020 Common unit adjustments and ESA extension costs, net of amortization and integration payments (included in intangible assets) (1) $ 596.4 $ 608.1 Current payable to founding members under tax receivable agreement (2) $ — $ 0.6 Long-term payable to founding members under tax receivable agreement (2) $ 21.3 $ 23.7 Other payables to founding members (3) $ — $ 0.6 (1) Refer to Note 4— Intangible Assets for further information on common unit adjustments and integration payments. This balance includes common unit adjustments issued to all of the founding members (including AMC) as the Company's intangible balance is considered one asset inclusive of all common unit adjustment activity. (2) The Company paid Cinemark and Regal $0.2 million and $0.4 million during 2021 and $3.2 million and $5.8 million during 2020, respectively, in payments pursuant to the TRA which were for the 2019 tax year. (3) Includes other payments made to the founding members in the ordinary course of business.
Schedule of Mandatory Distributions to Members	Mandatory distributions of available cash for the three and nine months ended September 30, 2021 and September 24, 2020 were as follows (in millions): Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Cinemark $ — $ — $ — $ 2.1 Regal — — — 2.2 Total distributions to related parties — — — 4.3 NCM, Inc. — — — 4.1 Total $ — $ — $ — $ 8.4
Schedule of Amounts Due to Founding Members, Net	Amounts due to related party founding members, net as of December 31, 2020 were comprised of the following (in millions): Cinemark Regal Total Theater access fees and revenue share, net of beverage revenues and other $ 0.6 $ 0.9 $ 1.5 Integration payments due from founding members (0.1) (0.1) (0.2) Total amounts due to founding members, net $ 0.5 $ 0.8 $ 1.3

Borrowings (Tables)

Borrowings (Tables)	3 Months Ended
	Sep. 30, 2021
NCM, LLC.
Schedule of Outstanding Debt	The following table summarizes NCM LLC’s total outstanding debt as of September 30, 2021 and December 31, 2020 and the significant terms of its borrowing arrangements (in millions): Outstanding Balance as of Borrowings September 30, 2021 December 31, 2020 Maturity Interest Revolving credit facility $ 167.0 $ 167.0 June 20, 2023 (1) Term loans - first tranche 261.2 263.3 June 20, 2025 (1) Term loans - second tranche 49.8 — December 20, 2024 (1) Senior secured notes due 2028 400.0 400.0 April 15, 2028 5.875% Senior unsecured notes due 2026 230.0 230.0 August 15, 2026 5.750% Total borrowings 1,108.0 1,060.3 Less: debt issuance costs and debt discounts related to (11.2) (8.0) Total borrowings, net 1,096.8 1,052.3 Less: current portion of debt (3.2) (2.7) Carrying value of long-term debt $ 1,093.6 $ 1,049.6 ___________________________________________________ (1) The interest rates on the revolving credit facility and term loans are described below.

Commitments and Contingencies (

Commitments and Contingencies (Tables)	3 Months Ended
	Sep. 30, 2021
Commitments and Contingencies Disclosure [Abstract]
Lease Cost	These costs are presented within “Selling and marketing costs” and “Administrative and other costs” within the unaudited Condensed Consolidated Statements of Income depending upon the nature of the use of the facility. Three Months Ended Nine Months Ended September 30, 2021 September 24, 2020 September 30, 2021 September 24, 2020 Operating lease cost $ 0.8 $ 0.9 $ 2.6 $ 2.7 Variable lease cost 0.2 0.1 0.4 0.4 Total lease cost $ 1.0 $ 1.0 $ 3.0 $ 3.1

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	3 Months Ended
	Sep. 30, 2021
Fair Value Disclosures [Abstract]
Schedule of Other Assets	Other investments consisted of the following (in millions): As of September 30, 2021 December 31, 2020 Investment in AC JV, LLC (1) $ 0.6 $ 0.7 Other investments 0.1 0.1 Total $ 0.7 $ 0.8 _______________________________________ (1) Refer to Note 5— Related Party Transactions . This investment is accounted for utilizing the equity method.
Estimated Fair Values of Company's Financial Instruments	The estimated fair values of the Company’s financial instruments where carrying values do not approximate fair value were as follows (in millions): As of September 30, 2021 As of December 31, 2020 Carrying Value Fair Value (1) Carrying Value Fair Value (1) Term loans - first tranche $ 261.2 $ 237.7 $ 263.3 $ 217.2 Term loans - second tranche $ 49.8 $ 50.0 $ — $ — Notes due 2028 $ 400.0 $ 376.0 $ 400.0 $ 337.5 Notes due 2026 $ 230.0 $ 189.8 $ 230.0 $ 160.7 ____________________________________________ (1) If the Company were to measure the borrowings in the above table at fair value on the balance sheet they would be classified as Level 2 based upon the inputs utilized.
Fair Values of the Company's Assets	The fair values of the Company’s assets and liabilities measured on a recurring basis pursuant to ASC 820-10, Fair Value Measurements and Disclosures are as follows (in millions): Fair Value Measurements at Reporting Date Using Fair Value as of September 30, 2021 Quoted Prices in Active Markets for Identical Assets Significant Other Significant Unobservable Inputs ASSETS: Cash equivalents (1) $ 37.1 $ 37.1 $ — $ — Long-term marketable securities (2) 1.2 — 1.2 — Total assets $ 38.3 $ 37.1 $ 1.2 $ — Fair Value Measurements at Reporting Date Using Fair Value as of December 31, 2020 Quoted Prices in Active Markets for Identical Assets Significant Other Significant Unobservable Inputs ASSETS: Cash equivalents (1) $ 52.8 $ 52.8 $ — $ — Short-term marketable securities (2) 0.3 — 0.3 — Long-term marketable securities (2) 1.2 — 1.2 — Total assets $ 54.3 $ 52.8 $ 1.5 $ — ___________________________________________ (1) Cash Equivalents —The Company’s cash equivalents are carried at estimated fair value following the Company's election of the fair value option. Cash equivalents consist of money market accounts which the Company has classified as Level 1 given the active market for these accounts and commercial paper with original maturities of three months or less, which are classified as Level 2 and are valued as described below. (2) Short-Term and Long-Term Marketable Securities —The carrying amount and fair value of the marketable securities are equivalent since the Company accounts for these instruments at fair value. The Company’s government agency bonds, commercial paper and certificates of deposit are valued using third party broker quotes. The value of the Company’s government agency bonds is derived from quoted market information. The inputs in the valuation are classified as Level 1 if there is an active market for these securities; however, if an active market does not exist, the inputs are recorded at a lower level in the fair value hierarchy. The value of commercial paper and certificates of deposit is derived from pricing models using inputs based upon market information, including contractual terms, market prices and yield curves. The inputs to the valuation pricing models are observable in the market, and as such are generally classified as Level 2 in the fair value hierarchy. As of September 30, 2021 and December 31, 2020, there were $1.0 million and $1.3 million, respectively, of available-for-sale debt securities in unrealized loss positions without an allowance for credit losses. The Company has not recorded an allowance for credit losses for the marketable securities balance as of September 30, 2021 or December 31, 2020 given the immaterial difference between the amortized cost basis and the aggregate fair value of the Company's securities.
Schedule of Marketable Securities	The amortized cost basis, aggregate fair value and maturities of the marketable securities the Company held as of September 30, 2021 and December 31, 2020 were as follows: As of September 30, 2021 Amortized Cost Aggregate Fair Maturities (1) MARKETABLE SECURITIES: Long-term certificates of deposit $ 1.3 $ 1.2 2.1 Total marketable securities $ 1.3 $ 1.2 As of December 31, 2020 Amortized Cost Aggregate Fair Maturities (1) MARKETABLE SECURITIES: Short-term certificates of deposit $ 0.3 $ 0.3 0.6 Total short-term marketable securities 0.3 0.3 Long-term certificates of deposit 1.3 1.2 2.8 Total long-term marketable securities 1.3 1.2 Total marketable securities $ 1.6 $ 1.5 ___________________________________ (1) Maturities —Securities available for sale include obligations with various contractual maturity dates some of which are greater than one year. The Company considers the securities to be liquid and convertible to cash within 30 days.

The Company (Narrative) (Detail

The Company (Narrative) (Details)	3 Months Ended		9 Months Ended		12 Months Ended	48 Months Ended
	Sep. 30, 2021USD ($)Segmentshares	Sep. 24, 2020USD ($)shares	Sep. 30, 2021USD ($)shares	Sep. 24, 2020USD ($)shares	Dec. 30, 2021	Feb. 07, 2041	Mar. 23, 2021shares	Dec. 31, 2020USD ($)
General Company Information [Line Items]
Cumulative-effect adjustment for adoption of ASU 2014-09				$ 1,200,000
2019 ESA Amendment Extension Period						4 years
Remaining term (in years)	18 years
Membership units exchangeable into common stock ratio	100.00%
Number of reportable segment | Segment	1
Number of shares of restricted stock and stock units vested | shares	268,782	50,052	1,394,321	607,733
Operating lease, right-of-use asset	$ 19,200,000		$ 19,200,000
Short-term lease liability	2,000,000		2,000,000
Long-term lease liability	$ 21,000,000		21,000,000
Document Period End Date					Sep. 30, 2021
customer ten percent of revenue	100.00%	100.00%
Contract with Customer, Liability, New Contract Liabilities			(7,700,000)
Asset Impairment Charges	$ 0	$ 0	$ 0	$ 1,700,000
Customer Percentage of AR	22.00%		22.00%					10.10%
Common Membership Units Redeemed | shares							1,390,567
Customer with revenue in excess of ten percent of Accounts Payable								100.00%
Share-based Payment Arrangement, Expense	$ 200,000		$ 1,700,000
NCM, LLC.
General Company Information [Line Items]
Weighted average term, esa and affiliate (in years)	15 years 8 months 12 days
Common membership units outstanding | shares	166,605,854		166,605,854
NCM, LLC. | Founding Members
General Company Information [Line Items]
Liabilities recorded for related party obligations	$ 0		$ 0					$ 0
National Cine Media Inc [Member]
General Company Information [Line Items]
Common membership units outstanding | shares	80,417,510		80,417,510
American Multi Cinema Inc [Member]
General Company Information [Line Items]
Common membership units outstanding | shares	0		0
Cinemark
General Company Information [Line Items]
Common membership units outstanding | shares	43,161,550		43,161,550
Regal Entertainment Group [Member]
General Company Information [Line Items]
Common membership units outstanding | shares	43,026,794		43,026,794
Cinemark
General Company Information [Line Items]
Percentage of common membership units outstanding	25.90%
Regal Entertainment Group [Member]
General Company Information [Line Items]
Percentage of common membership units outstanding	25.80%
National Cine Media Inc [Member]
General Company Information [Line Items]
Percentage of common membership units outstanding	48.30%
American Multi Cinema Inc [Member]
General Company Information [Line Items]
Percentage of common membership units outstanding	0.00%
Revenue from Rights Concentration Risk [Member]
General Company Information [Line Items]
customer ten percent of revenue	11.80%	28.80%	11.60%	10.60%

The Company (Changes In Equity)

The Company (Changes In Equity) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020	Dec. 30, 2021
Accounting Policies [Abstract]
Document Period End Date					Sep. 30, 2021
Net loss attributable to NCM, Inc.	$ (15.2)	$ (12.7)	$ (57.3)	$ (30.2)
NCM LLC equity issued for purchase of intangible asset	0	0	6.8	5
Income tax and other impacts of subsidiary ownership changes	0.3	0	1.2	(3.9)
Change from net loss income attributable to NCM, Inc. and transfers from noncontrolling interests	$ (14.9)	$ (12.7)	(49.3)	$ (29.1)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Purchase of Interest by Parent			(6.6)
Consolidation, Less than Wholly Owned Subsidiary, Parent Ownership Interest, Changes, Issuance of Equity by Subsidiary to Noncontrolling Interests			$ 6.6

Revenue from Contracts with C_3

Revenue from Contracts with Customers (Narrative) (Details) - USD ($)	9 Months Ended
	Sep. 30, 2021	Dec. 31, 2020
Revenue from Contract with Customer [Abstract]
Noncancelable Long Term Contracts	$ 0
Make-good provision	2,900,000	$ 7,100,000
Unbilled accounts receivable	$ 3,300,000	$ 2,500,000

Revenue from Contracts with C_4

Revenue from Contracts with Customers (Remaining Performance Obligations) (Details)	Sep. 30, 2021
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2020-03-27
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Revenue from contract, payment due period from the customer	9 months

Revenue from Contracts with C_5

Revenue from Contracts with Customers (Summary of Revenue from Contracts with Customers) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Disaggregation of Revenue [Line Items]
Revenue	$ 31.7	$ 6	$ 51.1	$ 74.7
National and Regional Advertising Revenue [Member] [Member]
Disaggregation of Revenue [Line Items]
Revenue	22.9	3.5	35.5	55
Local advertising revenue
Disaggregation of Revenue [Line Items]
Revenue	5.4	2.3	9.6	14
Founding member advertising revenue from beverage concessionaire agreements
Disaggregation of Revenue [Line Items]
Revenue	$ 3.4	$ 0.2	$ 6	$ 5.7

Revenue from Contracts with C_6

Revenue from Contracts with Customers (Summary of Changes in Deferred Revenue) (Details) $ in Millions	9 Months Ended
	Sep. 30, 2021USD ($)
Contract Liabilities
Balance at beginning of period	$ (5.1)
New contract liabilities	1.7
Balance at end of period	(11.1)
Contract with Customer, Liability, New Contract Liabilities	(7.7)
National and regional advertising revenue
Balance at beginning of period	0.2
Provision for bad debt	0.1
Write-offs, net	0
Balance at end of period	0.3
Local And Regional Advertising Revenue [Member]
Balance at beginning of period	2.1
Provision for bad debt	(0.2)
Write-offs, net	(0.5)
Balance at end of period	$ 1.4

Loss Per Share (Schedule of Los

Loss Per Share (Schedule of Loss Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Earnings Per Share [Abstract]
Net loss attributable to NCM, Inc. (in millions)	$ (15.2)	$ (12.7)	$ (57.3)	$ (30.2)
Weighted average shares outstanding:
Basic (in shares)	80,359,723	78,016,737	79,652,152	77,925,552
Add: Dilutive effect of stock options and restricted stock (in shares)	0	0	0	0
Diluted (in shares)	80,359,723	78,016,737	79,652,152	77,925,552
Loss per NCM, Inc. share:
Basic (in usd per share)	$ (0.19)	$ (0.16)	$ (0.72)	$ (0.39)
Diluted (in usd per share)	$ (0.19)	$ (0.16)	$ (0.72)	$ (0.39)

Loss Per Share (Narrative) (Det

Loss Per Share (Narrative) (Details) - shares	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Stock Options And Non-Vested Restricted Stock
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted weighted average shares	4,797,243	4,484,702	4,797,243	4,484,702
Common Units
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Shares excluded from the calculation of diluted weighted average shares	86,188,344	84,531,328	85,601,326	83,678,699

Intangible Assets (Narrative) (

Intangible Assets (Narrative) (Details) - NCM, LLC. - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Finite-Lived Intangible Assets [Line Items]
Common membership units issued, net of returned	3,047,582	3,022,959
Increase (decrease) in intangible assets, net	$ 4.8	$ 10.5
AMC and Cinemark
Finite-Lived Intangible Assets [Line Items]
Increase (decrease) in intangible assets, net	0.2	0	$ 0.3	$ 1.4
Integration and other encumbered payments, related parties - financing activities	$ 0.2	$ 0	$ 0.3	$ 9.7
Minimum
Finite-Lived Intangible Assets [Line Items]
Percentage increase (decrease) in theater attendance for Common Unit adjustment to occur	(2.00%)
Maximum
Finite-Lived Intangible Assets [Line Items]
Percentage increase (decrease) in theater attendance for Common Unit adjustment to occur	2.00%

Related Party Transactions (Nar

Related Party Transactions (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020	Dec. 30, 2021	Dec. 31, 2020	Jan. 01, 2015
Related Party Transaction [Line Items]
Document Period End Date						Sep. 30, 2021
Payments of Distributions to Affiliates				$ 0	$ 36.8
Percentage of cash savings related to taxes	90.00%
Cash dividends on shares of NMC Inc	$ 4.1	$ 5.5		13	25.5
Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred	23.2 million		93.3 million
Payment To Founding Members Under Tax Sharing Arrangement				(0.9)	(12.8)
AC JV, LLC
Related Party Transaction [Line Items]
Investment in AC JV, LLC	$ 0.6			0.6			$ 0.7
Equity in earnings of non-consolidated entities	$ 0	$ (0.1)		(0.1)	(0.1)
NCM, LLC. | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage								4.00%
Founding Members
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement				$ 0.6	9
Cinemark
Related Party Transaction [Line Items]
Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred	6.0 million			24.2 million
Cinemark | Tax Year 2019 [Member]
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement	$ 0.2				3.2
Cinemark | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage								32.00%
Regal
Related Party Transaction [Line Items]
Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred	6.0 million			24.1 million
Regal | Tax Year 2019 [Member]
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement				$ 0.4	$ 5.8
Regal | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage								32.00%
National Cine Media Inc [Member]
Related Party Transaction [Line Items]
Negative Distribution Made to Limited Liability Company Member, Cash Distributions Deferred	11.2 million			45.0 million
Cinemark and Regal | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage								32.00%

Related Party Transactions (Sum

Related Party Transactions (Summary of Transactions Between the Company and the Founding Members Included in Statements of Income) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020	Dec. 30, 2021
Related Party Transaction [Line Items]
Document Period End Date					Sep. 30, 2021
Revenue	$ 31.7	$ 6	$ 51.1	$ 74.7
Theater access fees and revenue share to founding members (including fees to related parties of $11.4, $1.0, $19.8 and $13.6, respectively)	16.7	1.8	31	19.5
Selling and marketing costs	8.2	7.5	24.8	28.1
Founding Members
Related Party Transaction [Line Items]
Revenue	2.7	0.2	4.7	4.5
Theater access fees and revenue share to founding members (including fees to related parties of $11.4, $1.0, $19.8 and $13.6, respectively)	11.4	1
Theater access fee			19.8	13.6
Selling and marketing costs	0	0	0	0.1
Operating Costs and Expenses	$ 0	$ 0.4	$ 0.1	$ 0.4

Related Party Transactions (S_2

Related Party Transactions (Summary of Transactions Between the Company and the Founding Members Included in Statements of Income) (Additional Information) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 24, 2020	Jan. 01, 2015
Related Party Transaction [Line Items]
Payments to affiliates for tax sharing agreement		$ (0.9)	$ (12.8)
NCM, LLC. | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage				4.00%
Regal | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage				32.00%
Regal | NCM, LLC. | AC JV, LLC
Related Party Transaction [Line Items]
Promissory notes receivable from founding members				$ 8.3
Cinemark | AC JV, LLC
Related Party Transaction [Line Items]
Ownership percentage				32.00%
Cinemark | NCM, LLC. | AC JV, LLC
Related Party Transaction [Line Items]
Promissory notes receivable from founding members				$ 8.3
Founding Members
Related Party Transaction [Line Items]
Payments to affiliates for tax sharing agreement		$ 0.6	$ 9
Founding Members | Promissory Notes | NCM, LLC. | AC JV, LLC
Related Party Transaction [Line Items]
Debt payment terms	Interest and principal payments are due annually in six equal installments commencing on the first anniversary of the closing.

Related Party Transactions (S_3

Related Party Transactions (Summary of Transactions Between the Company and the Founding Members Included in Balance Sheets) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 30, 2021	Sep. 24, 2020	Dec. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement		$ (0.9)	$ (12.8)
Document Period End Date				Sep. 30, 2021
Common unit adjustments, net of amortization and integration payments (included in intangible assets)	$ 613.9	613.9			$ 627.8
Current payable to founding members under tax receivable agreement	0	0			0.9
Long-term payable to founding members under tax receivable agreement	29.3	29.3			32.6
Founding Members
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement		0.6	9
Common unit adjustments, net of amortization and integration payments (included in intangible assets)	596.4	596.4			608.1
Current payable to founding members under tax receivable agreement	0	0			0.6
Long-term payable to founding members under tax receivable agreement	21.3	21.3			23.7
Other Payables to FM	0	0			$ 0.6
Tax Year 2019 [Member] | Cinemark Holdings Inc [Member]
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement	$ 0.2		3.2
Tax Year 2019 [Member] | Regal Entertainment Group [Member]
Related Party Transaction [Line Items]
Payment To Founding Members Under Tax Sharing Arrangement		$ 0.4	$ 5.8

Related Party Transactions (S_4

Related Party Transactions (Summary of Transactions Between the Company and the Founding Members Included in Balance Sheets) (Additional Information) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020
Related Party Transaction [Line Items]
Payments to affiliates for tax sharing agreement	$ (0.9)	$ (12.8)

Related Party Transactions (Sch

Related Party Transactions (Schedule of Mandatory Distributions to Members) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020	Dec. 30, 2021
Related Party Transaction [Line Items]
Document Period End Date					Sep. 30, 2021
Cash distributions declared to members	$ 0	$ 0	$ 0	$ 8.4
Cinemark
Related Party Transaction [Line Items]
Cash distributions declared to members	0	0	0	2.1
Regal
Related Party Transaction [Line Items]
Cash distributions declared to members	0	0	0	2.2
Founding Members
Related Party Transaction [Line Items]
Cash distributions declared to members	0	0	0	4.3
NCM Inc.
Related Party Transaction [Line Items]
Cash distributions declared to members	0	0	0	4.1
A C J V L L C [Member]
Related Party Transaction [Line Items]
Income (Loss) from Equity Method Investments	$ 0	$ (0.1)	$ (0.1)	$ (0.1)

Related Party Transactions (S_5

Related Party Transactions (Schedule of Amounts Due to Founding Members, Net) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Related Party Transaction [Line Items]
Theater access fees and revenue share, net of beverage revenues and other encumbered theater payments	$ 2.8	$ 1.5
Integration payments due from founding members		(0.2)
Total amounts due to founding members, net	2.8	1.3
Cinemark
Related Party Transaction [Line Items]
Theater access fees and revenue share, net of beverage revenues and other encumbered theater payments	1.2	0.6
Integration payments due from founding members		(0.1)
Total amounts due to founding members, net	1.2	0.5
Regal
Related Party Transaction [Line Items]
Theater access fees and revenue share, net of beverage revenues and other encumbered theater payments	1.6	0.9
Integration payments due from founding members		(0.1)
Total amounts due to founding members, net	$ 1.6	$ 0.8

Borrowings (Schedule of Outstan

Borrowings (Schedule of Outstanding Debt) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 30, 2021	Sep. 30, 2021	Dec. 31, 2020	Aug. 19, 2016
Debt Instrument [Line Items]
Document Period End Date	Sep. 30, 2021
Debt issuance costs, long-term		$ (11.2)	$ (8)
Carrying value of long-term debt		1,093.6	1,049.6
NCM, LLC.
Debt Instrument [Line Items]
Outstanding borrowings		1,108	1,060.3
Debt issuance costs, long-term		(11.2)	(8)
Long-term Debt		1,096.8	1,052.3
Carrying value of long-term debt		1,093.6	1,049.6
Less: current portion of debt		(3.2)	(2.7)
NCM, LLC. | Senior secured notes due 2028
Debt Instrument [Line Items]
Outstanding borrowings		$ 230	230
Interest Rate		5.75%		5.75%
NCM, LLC. | Senior unsecured notes due 2026
Debt Instrument [Line Items]
Outstanding borrowings		$ 400	400
Interest Rate		5.875%
NCM, LLC. | Term loans - first tranche
Debt Instrument [Line Items]
Outstanding borrowings		$ 261.2	263.3
NCM, LLC. | Term Loan -Second Tranche
Debt Instrument [Line Items]
Outstanding borrowings		50	0
Carrying value of long-term debt		49.8
NCM, LLC. | Revolving credit facility
Debt Instrument [Line Items]
Outstanding borrowings		$ 167	$ 167

Borrowings (Narrative) (Details

Borrowings (Narrative) (Details) - USD ($)	1 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2020	Sep. 30, 2021	Sep. 30, 2021	Dec. 30, 2021	Mar. 08, 2021	Dec. 31, 2020	Dec. 26, 2019	Oct. 08, 2019	Aug. 19, 2016
Debt Instrument [Line Items]
Document Period End Date				Sep. 30, 2021
Line of Credit Facility, Asset Restrictions			$ 55,000,000
Line of Credit, Covenant, Maximum Senior Secured Leverage Ratio			39,000,000
Term Loan - Second Tranche, net					$ 43,000,000
Term Loan - Second Tranche, Discount Value					2,300,000
Term Loan - Second Tranche, Debt Issuance Costs					3,900,000
Term Loan - Second Tranche Loss on Debt Modification					$ 800,000
Carrying value of long-term debt		$ 1,093,600,000	1,093,600,000			$ 1,049,600,000
Senior secured notes due 2028
Debt Instrument [Line Items]
Debt instrument face amount								$ 400,000,000
Stated interest rate								5.875%
Debt instrument issued percentage of face value								100.00%
NCM, LLC.
Debt Instrument [Line Items]
Debt Instrument, carrying value		1,108,000,000	1,108,000,000			1,060,300,000
Cash and cash equivalents used in determining senior secured leverage ratio		100,000,000
Carrying value of long-term debt		$ 1,093,600,000	$ 1,093,600,000			1,049,600,000
NCM, LLC. | Senior Secured Credit Facility
Debt Instrument [Line Items]
Net total leverage ratio, covenant		6.25	6.25
Net senior secured leverage ratio		4.50	4.50
NCM, LLC. | Senior secured notes due 2022
Debt Instrument [Line Items]
Debt instrument, frequency of periodic payment		The Notes due 2022 pay interest semi-annually in arrears on April 15 and October 15 of each year, which commenced on October 15, 2012.
NCM, LLC. | Senior secured notes due 2028
Debt Instrument [Line Items]
Debt Instrument, carrying value		$ 230,000,000	$ 230,000,000			230,000,000
Debt instrument face amount									$ 250,000,000
Stated interest rate		5.75%	5.75%						5.75%
Debt instrument, frequency of periodic payment		The Notes due 2026 pay interest semi-annually in arrears on February 15 and August 15 of each year, which commenced on February 15, 2017.
Debt instrument issued percentage of face value									100.00%
Debt instrument, repurchase amount							$ 20,000,000
NCM, LLC. | Maximum | Senior Secured Credit Facility
Debt Instrument [Line Items]
Net senior secured leverage ratio		5.50	5.50
NCM, LLC. | Term loans - first tranche
Debt Instrument [Line Items]
Debt Instrument, carrying value		$ 261,200,000	$ 261,200,000			263,300,000
Weighted-average interest rate		5.00%	5.00%
Repayment of term loan facility		$ 8,800,000
NCM, LLC. | Term loans - first tranche | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate, percent		3.00%
NCM, LLC. | Term loans - first tranche | LIBOR | Credit Agreement Second Amendment
Debt Instrument [Line Items]
Basis spread on variable rate, percent		4.00%
NCM, LLC. | Term loans - first tranche | Base Rate
Debt Instrument [Line Items]
Basis spread on variable rate, percent		2.00%
NCM, LLC. | Term loans - first tranche | Base Rate | Credit Agreement Second Amendment
Debt Instrument [Line Items]
Basis spread on variable rate, percent		3.00%
NCM, LLC. | Term Loan -Second Tranche
Debt Instrument [Line Items]
Debt Instrument, carrying value		$ 50,000,000	$ 50,000,000			0
Weighted-average interest rate		9.00%	9.00%
Amortization rate		1.00%
Carrying value of long-term debt		$ 49,800,000	$ 49,800,000
NCM, LLC. | Term Loan -Second Tranche | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate, percent		8.00%
NCM, LLC. | Revolving credit facility
Debt Instrument [Line Items]
Borrowing amount of credit facility		$ 175,000,000	175,000,000
Debt Instrument, carrying value		167,000,000	167,000,000			$ 167,000,000
Proceeds from Lines of Credit	$ 110,000,000
Remaining borrowing capacity of credit facility		$ 6,800,000	$ 6,800,000
Unused line fee, percent		0.50%
Weighted-average interest rate		4.50%	4.50%
NCM, LLC. | Revolving credit facility | Letter of Credit
Debt Instrument [Line Items]
Outstanding letters of credit		$ 1,200,000	$ 1,200,000
NCM, LLC. | Initial Credit Agreement | LIBOR | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate						1.75%
NCM, LLC. | Initial Credit Agreement | LIBOR | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate						2.25%
NCM, LLC. | Initial Credit Agreement | Base Rate | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate						0.75%
NCM, LLC. | Initial Credit Agreement | Base Rate | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate						1.25%
NCM, LLC. | Credit Agreement Second Amendment | Senior Secured Credit Facility
Debt Instrument [Line Items]
Net total leverage ratio, covenant		6.75	6.75
Net senior secured leverage ratio		5.5	5.5
NCM, LLC. | Credit Agreement Second Amendment | LIBOR | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate					2.75%
NCM, LLC. | Credit Agreement Second Amendment | LIBOR | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate					3.25%
NCM, LLC. | Credit Agreement Second Amendment | Base Rate | Minimum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate					1.75%
NCM, LLC. | Credit Agreement Second Amendment | Base Rate | Maximum
Debt Instrument [Line Items]
Debt Instrument, Basis Spread on Variable Rate					2.25%

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020	Dec. 30, 2021
Income Tax Contingency [Line Items]
Effective tax rate			0.00%	20.40%
Income tax benefit	$ 0	$ 3.1	$ 0	$ 7.7
Document Period End Date					Sep. 30, 2021
Deferred income tax expense, net of valuation allowance	$ 0		$ 0
State and Federal
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				24.40%

Commitments and Contingencies_2

Commitments and Contingencies (Narrative) (Details) - USD ($)	3 Months Ended		9 Months Ended		12 Months Ended			60 Months Ended	160 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020	Oct. 31, 2022	Oct. 31, 2021	Oct. 31, 2020	Oct. 31, 2027	Feb. 13, 2041	Dec. 31, 2020	Nov. 01, 2019
Other Commitments [Line Items]
Operating lease, right-of-use asset	$ 19,200,000		$ 19,200,000
Short-term lease liability	2,000,000		2,000,000
Long-term lease liability	$ 21,000,000		$ 21,000,000
Weighted average remaining lease term	8 years 4 months 24 days		8 years 4 months 24 days
Operating lease payments	$ 900,000	$ 900,000	$ 2,900,000	$ 2,700,000
Weighted average discount rate	7.36%		7.36%
Maximum potential payment	$ 105,400,000		$ 105,400,000
Additional amount accrued related to minimum guarantees	200,000		200,000							$ 0
Cinemark and Regal [Member]
Other Commitments [Line Items]
Platinum Spot Revenue Percentage											25.00%
NCM, LLC. | Founding Members
Other Commitments [Line Items]
Liabilities recorded for related party obligations	$ 0		$ 0							$ 0
Percentage of increase in payment per theatre patron	8.00%
Term of increase in payment percentage per theater patron	5 years
Percentage of increase in payment per digital screen and digital cinema equipment	5.00%
Minimum
Other Commitments [Line Items]
Range of terms, in years	3 years
Minimum | NCM, LLC. | Founding Members
Other Commitments [Line Items]
Aggregate percentage of theater access fee paid	12.00%		12.00%
Maximum
Other Commitments [Line Items]
Range of terms, in years	20 years
Future patron payment | Cinemark and Regal [Member]
Other Commitments [Line Items]
Amount Increase In Payment Per Theater Patron					$ 0.05	$ 0.0375	$ 0.025	$ 0.052	$ 0.08

Commitments and Contingencies_3

Commitments and Contingencies (Operating Lease Cost) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 24, 2020	Sep. 30, 2021	Sep. 24, 2020
Commitments and Contingencies Disclosure [Abstract]
Operating Lease, Cost	$ 0.8	$ 0.9	$ 2.6	$ 2.7
Variable Lease, Cost	0.2	0.1	0.4	0.4
Lease, Cost	$ 1	$ 1	$ 3	$ 3.1

Fair Value Measurements (Schedu

Fair Value Measurements (Schedule of Other Investments) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Separate Account Investment [Line Items]
Other investments	$ 0.1	$ 0.1
Total other investments	0.7	0.8
AC JV, LLC
Fair Value, Separate Account Investment [Line Items]
Investment in AC JV, LLC	$ 0.6	$ 0.7

Fair Value Measurements (Narrat

Fair Value Measurements (Narrative) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Debt Securities, Available-for-sale, Realized Gain (Loss)	$ 1	$ 1.3

Fair Value Measurements (Estima

Fair Value Measurements (Estimated Fair Values of Company's Financial Instruments) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Term loans - first tranche | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	$ 261.2	$ 263.3
Term loans - first tranche | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	237.7	217.2
Senior Notes Due Two Zero Two Six [Member] [Member] | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	230	230
Senior Notes Due Two Zero Two Six [Member] [Member] | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	189.8	160.7
Senior unsecured notes due 2026 | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	400	400
Senior unsecured notes due 2026 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	376	$ 337.5
Term Loan -Second Tranche | Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	49.8
Term Loan -Second Tranche | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Debt Instrument	$ 50

Fair Value Measurements (Fair V

Fair Value Measurements (Fair Values of the Company's Assets and Liabilities) (Details) - USD ($) $ in Millions	Sep. 30, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Short-term marketable securities	$ 0	$ 0.3
Long-term marketable securities	1.2	1.2
Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	37.1	52.8
Short-term marketable securities		0.3
Long-term marketable securities	1.2	1.2
Total assets	38.3	54.3
Quoted Prices in Active Markets for Identical Assets (Level 1) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	37.1	52.8
Short-term marketable securities		0
Long-term marketable securities	0	0
Total assets	37.1	52.8
Significant Other Observable Inputs (Level 2) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Short-term marketable securities		0.3
Long-term marketable securities	1.2	1.2
Total assets	1.2	1.5
Significant Unobservable Inputs (Level 3) | Fair Value, Measurements, Recurring
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Cash equivalents	0	0
Short-term marketable securities		0
Long-term marketable securities	0	0
Total assets	$ 0	$ 0

Fair Value Measurements (Sche_2

Fair Value Measurements (Schedule of Marketable Securities) (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Sep. 30, 2021	Jul. 01, 2021	Dec. 31, 2020
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	$ 1.3		$ 1.6
Aggregate Fair Value - Short term marketable securities	0		0.3
Aggregate Fair Value - Long term marketable securities	1.2		1.2
Aggregate Fair Value - Total marketable securities	1.2		1.5
Certificates of Deposit
Debt Securities, Available-for-sale [Line Items]
Aggregate Fair Value - Short term marketable securities			0.3
Aggregate Fair Value - Long term marketable securities			1.2
Certificates of Deposit | Short Term Marketable Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis			0.3
Maturities		7 months 6 days
Certificates of Deposit | Long Term Marketable Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis			1.3
Maturities		2 years 9 months 18 days
Short Term Marketable Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis			0.3
Aggregate Fair Value - Short term marketable securities			0.3
Financial Certificates Of Deposit
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis	1.3
Aggregate Fair Value - Long term marketable securities	$ 1.2
Maturities	2 years 1 month 6 days
Long Term Marketable Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Amortized Cost Basis			1.3
Aggregate Fair Value - Long term marketable securities			$ 1.2

Subsequent Event (Narrative) (D

Subsequent Event (Narrative) (Details) $ / shares in Units, $ in Millions	Aug. 09, 2021USD ($)$ / shares
Subsequent Events [Line Items]
Cash dividends declared (in usd per share) | $ / shares	$ 0.05
Dividends payable | $	$ 4