INCOME TAXES - Reconciliation of Total Amounts of Unrecognized Tax Benefits Excluding Interest and Penalties (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
CUSA
Income Taxes [Line Items]
Beginning Balance	$ 51.0	$ 53.9	$ 54.0
Gross increases - tax positions in prior periods	0.5	2.2	0.0
Gross decreases - tax positions in prior periods	0.0	(5.1)	(0.2)
Gross increases - current period tax positions	0.7	0.2	0.1
Statute of limitations expiration	0.0	(0.2)	0.0
Ending Balance	52.2	51.0	53.9
CNK [Member]
Income Taxes [Line Items]
Beginning Balance	52.9	55.8	55.9
Gross increases - tax positions in prior periods	0.4	2.2	0.0
Gross decreases - tax positions in prior periods	0.0	(5.1)	(0.2)
Gross increases - current period tax positions	0.7	0.2	0.1
Statute of limitations expiration	0.0	(0.2)	0.0
Ending Balance	$ 54.0	$ 52.9	$ 55.8