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Investment in NCMI/NCM - Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Detail) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |
Impairment of long-lived and other assets |  | $ 9.4 | $ 92.3 | $ 10.1 |  | $ 92.3
Investment In NCMI |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |
Beginning Balance |  |  |  | 9.6 |  |
Equity in income (loss) of affiliates | [1] |  |  | (3.2) |  |
Redemption of common units of NCM for common stock of NCMI | [2] |  |  | 0.0 |  |
Unrealized gain on investment in NCMI |  | 9.2 |  | 9.2 | [2] |
Impairment of long-lived and other assets |  |  |  | (0.7) |  |
Ending Balance |  | 14.9 |  | 14.9 |  |
N C M Screen Advertising Advances |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |
Beginning Balance |  |  |  | (338.2) |  |
Interest accrued related to significant financing component | [3] |  |  | (11.4) |  |
Amortization of screen advertising advances |  |  |  | 16.2 |  |
Ending Balance |  | (333.4) |  | (333.4) |  |
Equity in Loss |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |
Beginning Balance |  |  |  | 0.0 |  |
Equity in income (loss) of affiliates | [1] |  |  | (3.2) |  |
Ending Balance |  | (3.2) |  | (3.2) |  |
Other Revenue |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |
Beginning Balance | [4] |  |  | 0.0 |  |
Screen rental revenue earned under ESA | [4],[5] |  |  | (10.4) |  |
Amortization of screen advertising advances | [4] |  |  | (16.2) |  |
Ending Balance | [4] | (26.6) |  | (26.6) |  |
Interest Expense - NCM |  |  |  |  |  |
Schedule Of Equity Method Investments [Line Items] |  |  |  |  |  |
Beginning Balance | [4] |  |  | 0.0 |  |
Interest accrued related to significant financing component |  |  |  | 11.4 |  |
Ending Balance |  | $ 11.4 |  | $ 11.4 |  |
[1] | Equity in loss is recorded one month in arrears. See Investment in National CineMedia below for discussion of accounting for investment in NCMI.
[2] | See Investment in National CineMedia below.
[3] | See Note 8 for the maturity of NCM screen advertising advances as of June 30, 2023.
[4] | The Company had a receivable from NCM of $10.4 as of June 30, 2023
[5] | Amounts include the per patron and per digital screen theatre access fees, net of amounts due to NCM for on-screen advertising time provided to the Company's beverage concessionaire of approximately $4.5.

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