Segments - Holdings - Selected Financial Information by Reportable Operating Segment (Detail) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Segment Reporting Information [Line Items]
Revenues		$ 921.8	$ 874.8	$ 2,235.2	$ 2,427.8
Adjusted EBITDA		220.5	196.8	433.3	514.5
Capital expenditures		43.0	35.1	90.2	89.7
Operating Segments
Segment Reporting Information [Line Items]
Adjusted EBITDA		220.5	196.8	433.3	514.5
Eliminations
Segment Reporting Information [Line Items]
Revenues		(3.4)	(3.7)	(8.6)	(10.7)
U.S. Operating Segment
Segment Reporting Information [Line Items]
Revenues	[1]	741.4	682.5	1,770.4	1,896.5
U.S. Operating Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		744.8	686.2	1,779.0	1,907.2
Adjusted EBITDA		180.7	151.2	338.6	395.4
Capital expenditures		33.5	26.9	67.7	70.7
International Operating Segment
Segment Reporting Information [Line Items]
Revenues		180.4	192.3	464.8	531.3
International Operating Segment | Operating Segments
Segment Reporting Information [Line Items]
Revenues		180.4	192.3	464.8	531.3
Adjusted EBITDA		39.8	45.6	94.7	119.1
Capital expenditures		$ 9.5	$ 8.2	$ 22.5	$ 19.0

[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.