Other Intangible Assets, net - Summary of Intangible Assets, Net (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Dec. 31, 2019
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	9 years 4 months 24 days
Intangible Assets, Gross	$ 110.1	$ 200.3
Accumulated Amortization	(44.8)	(48.1)
Intangible Assets, Net	$ 65.3	152.2
Covenant Not to Compete
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	2 years 3 months 18 days
Intangible Assets, Gross	$ 2.9	2.9
Accumulated Amortization	(1.1)	(0.3)
Intangible Assets, Net	$ 1.8	2.6
Trade Names and Trademarks
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	3 years 2 months 12 days
Intangible Assets, Gross	$ 0.9	5.6
Accumulated Amortization	(0.1)	(1.2)
Intangible Assets, Net	$ 0.8	4.4
Proprietary Know How
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	3 years 10 months 24 days
Intangible Assets, Gross	$ 3.8	10.4
Accumulated Amortization	(0.2)	(2.0)
Intangible Assets, Net	$ 3.6	8.4
Management Contract Rights
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	8 years 3 months 18 days
Intangible Assets, Gross	$ 81.0	81.0
Accumulated Amortization	(41.3)	(37.4)
Intangible Assets, Net	$ 39.7	43.6
Customer Relationships
Finite Lived Intangible Assets [Line Items]
Weighted Average Life (Years)	13 years 2 months 12 days
Intangible Assets, Gross	$ 21.5	100.4
Accumulated Amortization	(2.1)	(7.2)
Intangible Assets, Net	$ 19.4	$ 93.2