Investments in Affiliates - Summary of Activity with NCM Included in Company's Consolidated Financial Statements (Details) - USD ($) $ in Millions |
3 Months Ended | 9 Months Ended | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Investment In NCMI | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Beginning Balance | [1] | $ 17.0 | |||||||||
| Interest accrued related to significant financing component | [1] | 0.0 | |||||||||
| Annual common unit adjustment | [1],[2] | 0.0 | |||||||||
| Unrealized loss on fair market value adjustment of investment in NCMI | $ (6.8) | $ (1.5) | (7.2) | [1] | $ (9.3) | ||||||
| Amortization of screen advertising advances | [1] | 0.0 | |||||||||
| Ending Balance | [1] | 9.8 | 9.8 | ||||||||
| N C M Screen Advertising Advances | |||||||||||
| Schedule of Equity Method Investments [Line Items] | |||||||||||
| Beginning Balance | [3] | (307.2) | |||||||||
| Interest accrued related to significant financing component | [3] | (15.4) | |||||||||
| Annual common unit adjustment | [2],[3] | 0.5 | |||||||||
| Unrealized loss on fair market value adjustment of investment in NCMI | [3] | 0.0 | |||||||||
| Amortization of screen advertising advances | [3] | 24.3 | |||||||||
| Ending Balance | [3] | $ (297.8) | $ (297.8) | ||||||||
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