Intangible Assets - Components of Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	$ 188.8	$ 191.1
Accumulated Amortization	(24.1)	(10.6)
Net Book Value	$ 164.7	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	(15.6)	(6.1)
Net Book Value	$ 145.3	154.8
Tradename
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year
Gross Carrying Value	$ 1.1	1.1
Accumulated Amortization	(1.1)	(1.1)
Net Book Value	$ 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	(7.4)	(2.9)
Net Book Value	19.4	23.9
Favorable leasehold interests (1)
Finite-Lived Intangible Assets [Line Items]
Gross Carrying Value	0.0	2.3
Accumulated Amortization	0.0	(0.5)
Net Book Value	$ 0.0	$ 1.8
Minimum | Favorable leasehold interests (1)
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	1 year
Maximum | Favorable leasehold interests (1)
Finite-Lived Intangible Assets [Line Items]
Weighted Average Useful Life	8 years