Segments - Holdings - Selected Financial Information by Reportable Operating Segment (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Segment Reporting Information [Line Items]
Revenues		$ 734.2	$ 942.3	$ 1,313.4	$ 1,553.0
Adjusted EBITDA		142.1	231.5	212.8	317.7
Capital expenditures		23.7	28.3	47.2	54.6
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA		142.1	231.5	212.8	317.7
Eliminations
Segment Reporting Information [Line Items]
Revenues		(3.1)	(4.4)	(5.2)	(7.0)
U.S. Operating Segment
Segment Reporting Information [Line Items]
Revenues	[1]	572.0	734.9	1,029.0	1,214.0
U.S. Operating Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		575.1	739.3	1,034.2	1,221.0
Adjusted EBITDA		108.8	180.8	157.9	244.2
Capital expenditures		16.1	21.1	34.2	43.8
International Operating Segment
Segment Reporting Information [Line Items]
Revenues		162.2	207.4	284.4	339.0
International Operating Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		162.2	207.4	284.4	339.0
Adjusted EBITDA		33.3	50.7	54.9	73.5
Capital expenditures		$ 7.6	$ 7.2	$ 13.0	$ 10.8

[1] U.S. segment revenue excludes intercompany transactions with the international operating segment. See Note 16 for the amount of intercompany eliminations for the periods presented.