Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 187.7	$ 191.1
Accumulated Amortization	(19.5)	(10.6)
Total	$ 168.2	180.5
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	17 years
Gross Carrying Value	$ 160.9	160.9
Accumulated Amortization	(13.2)	(6.1)
Total	$ 147.7	154.8
Tradename
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year
Gross Carrying Value	$ 0.0	1.1
Accumulated Amortization	0.0	(1.1)
Total	$ 0.0	0.0
Technology
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	6 years
Gross Carrying Value	$ 26.8	26.8
Accumulated Amortization	(6.3)	(2.9)
Total	20.5	23.9
Favorable leasehold interests
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	0.0	2.3
Accumulated Amortization	0.0	(0.5)
Total	$ 0.0	$ 1.8
Minimum | Favorable leasehold interests
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year
Maximum | Favorable leasehold interests
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	8 years