Segments - Holdings - Selected Financial Information by Reportable Operating Segment (Detail) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Segment Reporting Information [Line Items]
Revenues		$ 942.3	$ 744.1	$ 1,553.0	$ 1,204.6
Adjusted EBITDA		231.5	138.3	317.7	163.5
Capital expenditures		28.3	21.9	54.6	40.6
U.S. Operating Segment
Segment Reporting Information [Line Items]
Revenues	[1]	734.9	600.8	1,214.0	972.8
International Operating Segment
Segment Reporting Information [Line Items]
Revenues		207.4	143.3	339.0	231.8
Operating Segments | U.S. Operating Segment
Segment Reporting Information [Line Items]
Revenues		739.3	603.5	1,221.0	977.2
Adjusted EBITDA		180.8	111.1	244.2	125.5
Capital expenditures		21.1	16.5	43.8	30.5
Operating Segments | International Operating Segment
Segment Reporting Information [Line Items]
Revenues		207.4	143.3	339.0	231.8
Adjusted EBITDA		50.7	27.2	73.5	38.0
Capital expenditures		7.2	5.4	10.8	10.1
Eliminations
Segment Reporting Information [Line Items]
Revenues		$ (4.4)	$ (2.7)	$ (7.0)	$ (4.4)

[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.