Other Intangible Assets, net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018	Dec. 31, 2018
Intangible assets, net
Weighted average life			12 years
Acquired intangible assets, gross	$ 199.0		$ 199.0		$ 200.3
Accumulated Amortization	(40.6)		(40.6)		(34.3)
Acquired Intangible Assets, Net	158.4		158.4		166.0
Amortization expense related to other intangible assets included in depreciation and amortization	3.8	$ 1.3	$ 7.6	$ 2.7
Minimum
Intangible assets, net
Weighted average life			4 years
Maximum
Intangible assets, net
Weighted average life			15 years
Covenant not to compete
Intangible assets, net
Weighted average life			4 years 4 months 24 days
Acquired intangible assets, gross	1.6		$ 1.6		1.6
Accumulated Amortization	(0.2)		(0.2)		0.0
Acquired Intangible Assets, Net	1.4		$ 1.4		1.6
Trade names and trademarks
Intangible assets, net
Weighted average life			4 years 4 months 24 days
Acquired intangible assets, gross	5.6		$ 5.6		6.3
Accumulated Amortization	(0.7)		(0.7)		(0.7)
Acquired Intangible Assets, Net	4.9		$ 4.9		5.6
Proprietary know how
Intangible assets, net
Weighted average life			5 years 2 months 12 days
Acquired intangible assets, gross	10.4		$ 10.4		11.0
Accumulated Amortization	(1.0)		(1.0)		(0.8)
Acquired Intangible Assets, Net	9.4		$ 9.4		10.2
Management contract rights
Intangible assets, net
Weighted average life			9 years 6 months
Acquired intangible assets, gross	81.0		$ 81.0		81.0
Accumulated Amortization	(34.8)		(34.8)		(32.2)
Acquired Intangible Assets, Net	46.2		$ 46.2		48.8
Customer relationships
Intangible assets, net
Weighted average life			14 years 4 months 24 days
Acquired intangible assets, gross	100.4		$ 100.4		100.4
Accumulated Amortization	(3.9)		(3.9)		(0.6)
Acquired Intangible Assets, Net	$ 96.5		$ 96.5		$ 99.8