Supplemental Cash Flow Information - Schedule of Supplemental Information to Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Millions |
9 Months Ended | |||||
|---|---|---|---|---|---|---|
Sep. 30, 2026 |
Sep. 30, 2025 |
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| Schedule Of Cash Flow Supplemental [Line Items] | ||||||
| Cash paid for interest by CUSA | $ 104.7 | $ 111.4 | ||||
| Cash paid for income taxes, net | 28.0 | 26.5 | ||||
| Noncash operating activities: | ||||||
| Interest expense - NCM (see Note 8) | (15.4) | (16.0) | ||||
| Noncash investing activities: | ||||||
| Change in accounts payable and accrued expenses for the acquisition of theatre properties and equipment | [1] | 0.2 | 19.9 | |||
| Theater properties and other assets acquired under finance leases | 0.0 | 1.3 | ||||
| Noncash financing activities: | ||||||
| Dividends accrued on unvested performance and restricted stock unit awards | 0.7 | 0.7 | ||||
| Cinemark Holdings Inc | ||||||
| Schedule Of Cash Flow Supplemental [Line Items] | ||||||
| Cash paid for interest by Holdings | [2] | $ 104.7 | $ 132.1 | |||
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