Supplemental Information to Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Millions			9 Months Ended
		Apr. 01, 2024	Sep. 30, 2024	Sep. 30, 2023
Schedule Of Cash Flow Supplemental [Line Items]
Cash paid for income taxes, net			$ 17.1	$ 15.7
Cash transferred from restricted accounts	[1]		0.0	(10.8)
Noncash investing and financing activities:
Change in accounts payable and accrued expenses for the acquisition of theatre properties and equipment	[2]		(3.5)	(3.9)
Theatre and other assets acquired under finance leases			31.3	0.0
Investment in NCMI - receipt of common units in NCM (see Note 8)		$ 0.5	0.5	0.0
NCM
Noncash investing and financing activities:
Interest expense - NCM (see Note 8)			(16.5)	(17.0)
Cinemark Partners Second [Member]
Schedule Of Cash Flow Supplemental [Line Items]
Cash paid for interest by CUSA			108.5	111.2
Cinemark Holdings Inc [Member]
Schedule Of Cash Flow Supplemental [Line Items]
Cash paid for interest by Holdings	[3]		$ 129.2	$ 131.9

[1] Represents cash transferred out of collateral accounts during the period as a result of the cancellation of letters of credit to lenders upon the repayment of related debt.

[2] Additions to theatre properties and equipment included in accounts payable as of September 30, 2024 and December 31, 2023 were $3.1 and $6.6, respectively.

[3] Includes the cash interest paid by CUSA.