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Segments - Reconciliation of Reportable Segment Adjusted EBITDA to Income Before Income Tax Expense (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Reconciliation of reportable segment Adjusted EBITDA to income before income tax expense:
Total reportable segment Adjusted EBITDA	$ 278.2	$ 248.8	$ 554.9	$ 489.0
Less:
Depreciation expense	50.5	47.0	100.3	94.4
Unallocated general and administrative expenses	1.7	2.0	3.9	4.5
Interest expense, net	49.7	43.8	98.2	85.4
Income before income tax expense	$ 176.3	$ 156.0	$ 352.5	$ 304.7

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Income (loss) from continuing operations before interest income taxes depreciation and amortization.

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