IMPAIRMENT OF LONG-LIVED AND OTHER ASSETS - Summary of Long-Lived Asset Impairment Losses (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022		Dec. 31, 2021
Impaired Long Lived Assets Held And Used [Line Items]
Total impairment		$ 16.6	$ 174.1		$ 20.8
Investment In Ncm [Member]
Impaired Long Lived Assets Held And Used [Line Items]
Total impairment		0.7	113.2	[1]
Us Operating Segment [Member]
Impaired Long Lived Assets Held And Used [Line Items]
Theatre properties		6.6	19.7		6.4
Theatre operating lease right-of-use assets		7.1	34.0		6.8
Investment	[2]	0.7	113.2		0.0
Other		0.0	3.9		0.0
Total impairment		14.4	170.8		13.2
International Operating Segment [Member]
Impaired Long Lived Assets Held And Used [Line Items]
Theatre properties		0.7	2.2		4.0
Theatre operating lease right-of-use assets		1.5	1.1		3.2
Intangible assets		0.0	0.0		0.4
Total impairment		$ 0.0	$ 3.3		$ 7.6

[1] See Investment in National CineMedia below.

[2] See discussion at Investment in National CineMedia in Note 9.