Other Intangible Assets, net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Intangible assets, net
Weighted average life (in years)			11 years 9 months 18 days
Acquired intangible assets, gross	$ 199.0		$ 199.0		$ 200.3
Accumulated Amortization	(44.4)		(44.4)		(34.3)
Acquired Intangible Assets, Net	154.6		154.6		166.0
Amortization expense related to other intangible assets included in depreciation and amortization	3.8	$ 1.3	$ 11.4	$ 4.0
Minimum
Intangible assets, net
Weighted average life (in years)			4 years
Maximum
Intangible assets, net
Weighted average life (in years)			15 years
Covenant not to compete
Intangible assets, net
Weighted average life (in years)			4 years 2 months 12 days
Acquired intangible assets, gross	1.6		$ 1.6		1.6
Accumulated Amortization	(0.3)		(0.3)		0.0
Acquired Intangible Assets, Net	1.3		$ 1.3		1.6
Trade names and trademarks
Intangible assets, net
Weighted average life (in years)			4 years 2 months 12 days
Acquired intangible assets, gross	5.6		$ 5.6		6.3
Accumulated Amortization	(0.9)		(0.9)		(0.7)
Acquired Intangible Assets, Net	4.7		$ 4.7		5.6
Proprietary know how
Intangible assets, net
Weighted average life (in years)			4 years 10 months 24 days
Acquired intangible assets, gross	10.4		$ 10.4		11.0
Accumulated Amortization	(1.5)		(1.5)		(0.8)
Acquired Intangible Assets, Net	8.9		$ 8.9		10.2
Management contract rights
Intangible assets, net
Weighted average life (in years)			9 years 3 months 18 days
Acquired intangible assets, gross	81.0		$ 81.0		81.0
Accumulated Amortization	(36.1)		(36.1)		(32.2)
Acquired Intangible Assets, Net	44.9		$ 44.9		48.8
Customer relationships
Intangible assets, net
Weighted average life (in years)			14 years 2 months 12 days
Acquired intangible assets, gross	100.4		$ 100.4		100.4
Accumulated Amortization	(5.6)		(5.6)		(0.6)
Acquired Intangible Assets, Net	$ 94.8		$ 94.8		$ 99.8