Derivatives - Schedule of Interest Rate Swaps (Details) - Interest Rate Swap - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Weighted average fixed rate paid	2.31%	2.31%
Variable rate received	2.48%	2.46%
Other current assets | Designated portion, measured at fair value
Derivative [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	$ 0.0	$ 15.3
Other current liabilities | Designated portion, measured at fair value
Derivative [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	0.0	6.8
Accumulated other comprehensive income | Designated portion, measured at fair value
Derivative [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	0.0	39.7
Accumulated other comprehensive income | De-designated portion, unamortized value
Derivative [Line Items]
Interest Rate Cash Flow Hedge Derivative at Fair Value, Net	23.6	(2.4)
Liabilities Subject to Compromise [Member] | De-designated portion, unamortized value
Derivative [Line Items]
Liabilities Subject to Compromise, Derivative Liability	$ 6.1	$ 0.0