Other Intangible Assets, net - Components of Intangible Assets, Net (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	6 years 8 months 12 days
Intangible Assets, Gross	$ 135.6	$ 133.2
Accumulated Amortization	(73.3)	(64.3)
Intangible Assets, Net	$ 62.3	68.9
Management Contract Rights
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	5 years 9 months 18 days
Intangible Assets, Gross	$ 81.0	81.0
Accumulated Amortization	(56.7)	(52.9)
Intangible Assets, Net	$ 24.3	28.1
Proprietary Know How
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	6 years 6 months
Intangible Assets, Gross	$ 23.8	21.7
Accumulated Amortization	(5.2)	(2.7)
Intangible Assets, Net	$ 18.6	19.0
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	7 years 9 months 18 days
Intangible Assets, Gross	$ 25.0	24.8
Accumulated Amortization	(8.3)	(6.6)
Intangible Assets, Net	$ 16.7	18.2
Trade Names and Trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	12 years 3 months 18 days
Intangible Assets, Gross	$ 2.9	2.8
Accumulated Amortization	(1.1)	(0.7)
Intangible Assets, Net	$ 1.8	2.1
Covenant Not to Compete
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	3 years 6 months
Intangible Assets, Gross	$ 2.9	2.9
Accumulated Amortization	(2.0)	(1.4)
Intangible Assets, Net	$ 0.9	$ 1.5