IMPACT OF THE COVID-19 PANDEMIC - Schedule of Restructuring Plan (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		$ 0.0
Restructuring costs		0.0	$ (0.5)	$ (1.0)
Restructuring Reserve, Ending Balance		0.0	0.0
2020 Restructuring Plan | U.S. Operating Segment
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	1.3	6.6
Amounts paid			(0.9)	(4.3)
Reserve adjustments	[1]		(0.4)	(1.0)
Restructuring Reserve, Ending Balance			0.0	1.3
2020 Restructuring Plan | U.S. Operating Segment | Employee Related
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	0.4	0.9
Amounts paid			(0.4)	(0.4)
Reserve adjustments	[1]		0.0	(0.1)
Restructuring Reserve, Ending Balance			0.0	0.4
2020 Restructuring Plan | U.S. Operating Segment | Facility Closure Costs
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	0.9	5.7
Amounts paid			(0.5)	(3.9)
Reserve adjustments	[1]		(0.4)	(0.9)
Restructuring Reserve, Ending Balance			0.0	0.9
2020 Restructuring Plan | International Operating Segment
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	0.1	0.1
Amounts paid			0.0	0.0
Reserve adjustments	[1]		(0.1)	0.0
Restructuring Reserve, Ending Balance			0.0	0.1
2020 Restructuring Plan | International Operating Segment | Employee Related
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	0.0	0.0
Amounts paid			0.0	0.0
Reserve adjustments	[1]		0.0	0.0
Restructuring Reserve, Ending Balance			0.0	0.0
2020 Restructuring Plan | International Operating Segment | Facility Closure Costs
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	0.1	0.1
Amounts paid			0.0	0.0
Reserve adjustments	[1]		(0.1)	0.0
Restructuring Reserve, Ending Balance			0.0	0.1
2020 Restructuring Plan | Consolidated
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	1.4	6.7
Amounts paid			(0.9)	(4.3)
Reserve adjustments	[1]		(0.5)	(1.0)
Restructuring Reserve, Ending Balance			0.0	1.4
2020 Restructuring Plan | Consolidated | Employee Related
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		0.0	0.4	0.9
Amounts paid			(0.4)	(0.4)
Reserve adjustments	[1]		0.0	(0.1)
Restructuring Reserve, Ending Balance			0.0	0.4
2020 Restructuring Plan | Consolidated | Facility Closure Costs
Unusual Or Infrequent Item [Line Items]
Restructuring Reserve, Beginning Balance		$ 0.0	1.0	5.8
Amounts paid			(0.5)	(3.9)
Reserve adjustments	[1]		(0.5)	(0.9)
Restructuring Reserve, Ending Balance			$ 0.0	$ 1.0

[1] Amounts were primarily adjustments based on final facility lease payments for certain closed theatres as compared with original estimates recorded.