SEGMENTS - HOLDINGS - Selected Financial Information by Reportable Operating Segment (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Segment Reporting Information [Line Items]
Revenue		$ 3,049.5	$ 3,066.7	$ 2,454.7
Adjusted EBITDA		590.2	594.1	336.5
Total capital expenditures		150.8	149.5	110.7
U.S. Operating Segment
Segment Reporting Information [Line Items]
Revenue	[1],[2]	2,436.8	2,415.3	1,970.2
U.S. Reportable Segment [Member]
Segment Reporting Information [Line Items]
Total capital expenditures		109.1	111.5	87.2
International Operating Segment
Segment Reporting Information [Line Items]
Revenue		612.7	651.4	484.5
International Reportable Segment [Member]
Segment Reporting Information [Line Items]
Total capital expenditures		41.7	38.0	23.5
Operating Segments
Segment Reporting Information [Line Items]
Revenues		3,060.8	3,079.5	2,462.4
Revenue		3,049.5	3,066.7	2,454.7
Film rentals and advertising	[3]	859.6	865.7	704.4
Concession supplies	[3]	225.4	221.3	169.3
Salaries and wages	[3]	401.8	403.1	372.7
Facility lease expense	[3]	325.3	329.7	308.3
Utilities and other	[3],[4]	459.4	466.8	407.2
General and administrative expenses	[3]	218.1	198.8	177.6
Other segment items	[3],[5]	(30.3)	(12.8)	(21.3)
Adjusted EBITDA	[6]	590.2	594.1	336.5
Operating Segments | U.S. Reportable Segment [Member]
Segment Reporting Information [Line Items]
Revenues		2,448.1	2,428.1	1,977.9
Revenue		2,436.8	2,415.3	1,970.2
Film rentals and advertising	[3]	714.4	703.6	584.4
Concession supplies	[3]	174.5	169.1	130.5
Salaries and wages	[3]	335.6	333.8	314.7
Facility lease expense	[3]	245.8	246.6	250.1
Utilities and other	[3],[4]	356.5	355.4	313.7
General and administrative expenses	[3]	172.2	155.7	141.9
Other segment items	[3],[5]	(28.8)	(12.8)	(20.8)
Adjusted EBITDA	[6]	466.6	463.9	255.7
Operating Segments | International Reportable Segment [Member]
Segment Reporting Information [Line Items]
Revenues		612.7	651.4	484.5
Revenue		612.7	651.4	484.5
Film rentals and advertising	[3]	145.2	162.1	120.0
Concession supplies	[3]	50.9	52.2	38.8
Salaries and wages	[3]	66.2	69.3	58.0
Facility lease expense	[3]	79.5	83.1	58.2
Utilities and other	[3],[4]	102.9	111.4	93.5
General and administrative expenses	[3]	45.9	43.1	35.7
Other segment items	[3],[5]	(1.5)		(0.5)
Adjusted EBITDA	[6]	123.6	130.2	80.8
Eliminations
Segment Reporting Information [Line Items]
Revenue		(11.3)	(12.8)	(7.7)
Eliminations | U.S. Reportable Segment [Member]
Segment Reporting Information [Line Items]
Revenue		(11.3)	(12.8)	(7.7)
Eliminations | International Reportable Segment [Member]
Segment Reporting Information [Line Items]
Utilities and other		$ 11.3	$ 12.8	$ 7.7

[1] U.S. segment revenues exclude intercompany transactions with the international reportable segment. See Note 21 for additional information on intercompany eliminations.

[2] U.S. segment revenues exclude intercompany transactions with the international reportable segment. See Note 21 for additional information on intercompany eliminations

[3] The significant expense categories and amounts presented align with the segment-level information that is regularly provided to the CODM.

[4] Utilities and other for the International reportable segment is shown net of intersegment expenses of $11.3, $12.8, and $7.7 for the years ended December 31, 2024, 2023 and 2022, respectively.

[5] Other segment items for each reportable segment includes non-cash rent, share-based compensation expense and cash distributions from equity investees (reported entirely within the U.S. reportable segment).

[6] See the table below for a reconciliation of net (loss) income to Adjusted EBITDA