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Commitments and Contingencies (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended		12 Months Ended
	Apr. 01, 2021	Jun. 30, 2021	Jun. 30, 2020	Mar. 31, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2018	Dec. 31, 2020
Guarantor Obligations [Line Items]
Professional, general and workers' compensation insurance reserve		$ 23.2			$ 23.2			$ 21.4
Expected insurance recoveries		10.5			10.5			10.5
Payment under settlement agreement	$ 30.7
Litigation-related charge		0.0	$ 0.0	$ 1.2	$ 0.0	$ 1.2	$ 46.0
Projected tax savings period					5 years
Federal effective tax rate (percent)					24.00%
Long-term tax receivable agreement liability		43.2			$ 43.2			43.2
Net long-term tax receivable agreement liability		38.9			38.9			37.0
Current portion of tax liability		$ 21.2			$ 21.2			$ 21.2
Federal Funds Rate
Guarantor Obligations [Line Items]
Debt instrument, basis spread on variable rate (percent)					3.00%
Collaborative tax agreement, basis spread on variable rate (percent)					3.00%
LIBOR | Materially More Restrictive
Guarantor Obligations [Line Items]
Debt instrument, basis spread on variable rate (percent)					5.00%
LIBOR | Not Materially More Restrictive
Guarantor Obligations [Line Items]
Debt instrument, basis spread on variable rate (percent)					3.00%

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