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Investments in Affiliates - Summary of Activity for Each of Company's Investments in affiliates (Detail) - Other Affiliates [Member] $ in Millions | 3 Months Ended
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Mar. 31, 2025 USD ($)
Schedule Of Equity Method Investments [Line Items] |
Investments, beginning balance | $ 26.2
Cash distributions received | (4.8)
Equity income | 0.9
Investments, ending balance | 22.3
AC JV, LLC |
Schedule Of Equity Method Investments [Line Items] |
Investments, beginning balance | 4.1
Cash distributions received | (0.8)
Equity income | 0.9
Investments, ending balance | 4.2
Digital Cinema Distribution Coalition |
Schedule Of Equity Method Investments [Line Items] |
Investments, beginning balance | 2.6
Cash distributions received | 0.0
Equity income | (0.2)
Investments, ending balance | 2.4
FE Concepts, LLC |
Schedule Of Equity Method Investments [Line Items] |
Investments, beginning balance | 19.5
Cash distributions received | (4.0)
Equity income | 0.2
Investments, ending balance | $ 15.7

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