Foreign Currency Translation - Additional Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Cumulative foreign currency losses	$ 400.6		$ 400.6		$ 425.1
Cumulative inflation rate	100.00%		100.00%
Cumulative inflation period			3 years
AR
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Foreign currency and other related gain (loss)			$ 3.7	$ 2.1
CNK [Member]
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Accumulated other comprehensive income (loss)	$ 395.5		395.5		416.7
Foreign currency and other related gain (loss)	(1.0)	$ (6.3)	(0.5)	(4.9)
CUSA [Member]
Financial Statement Line Items with Differences in Reported Amount and Reporting Currency Denominated Amounts [Line Items]
Accumulated other comprehensive income (loss)	398.3		398.3		$ 419.5
Foreign currency and other related gain (loss)	$ (1.0)	$ (6.3)	$ (0.5)	$ (4.9)