Supplemental Information to Condensed Consolidated Statements of Cash Flows (Detail) - USD ($) $ in Millions			6 Months Ended
		Apr. 01, 2024	Jun. 30, 2024	Jun. 30, 2023
Schedule Of Cash Flow Supplemental [Line Items]
Cash paid for income taxes, net			$ 12.8	$ 7.2
Noncash investing and financing activities:
Change in accounts payable and accrued expenses for the acquisition of theatre properties and equipment	[1]		0.5	1.5
Theatre and other assets acquired under finance leases			28.0	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)			(11.1)	(11.4)
Cinemark Partners Second [Member]
Schedule Of Cash Flow Supplemental [Line Items]
Cash paid for interest by CUSA			66.0	66.6
Cinemark Holdings Inc [Member]
Schedule Of Cash Flow Supplemental [Line Items]
Cash paid for interest by Holdings	[2]		$ 76.4	$ 77.0

[1] Additions to theatre properties and equipment included in accounts payable as of June 30, 2024 and December 31, 2023 were $7.1 and $6.6, respectively.

[2] Includes the cash interest paid by CUSA.