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Debt - Summary of Debt (Details) - USD ($) $ in Millions	Mar. 31, 2020	Mar. 02, 2020	Jan. 31, 2020	Dec. 31, 2019
Debt Instrument [Line Items]
Long-term debt, gross	$ 2,475.3
Unamortized discount and issuance costs	(34.2)			$ (117.9)
Long-term debt, gross	2,441.1			3,467.3
Less: Current Portion	(22.2)			0.0
Total long-term debt, net of current portion	2,418.9			3,467.3
Term Loan due 2027 \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	2,200.0			0.0
Stated interest rate		1.00%
ABL Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	275.3			145.2
Term Loan due 2023 \| Revolving Credit Facility
Debt Instrument [Line Items]
Long-term debt, gross	0.0			2,070.0
9.250% Notes due 2024 \| Notes Payable to Banks
Debt Instrument [Line Items]
Long-term debt, gross	0.0			750.0
Stated interest rate			9.25%
12.00%/13.00% Senior PIK Toggle Notes due 2022 \| Senior Notes
Debt Instrument [Line Items]
Long-term debt, gross	0.0			500.0
Cash interest rate, stated percentage			12.00%
PIK interest rate, stated percentage			13.00%
10.00% Notes due 2024 \| Notes Payable to Banks
Debt Instrument [Line Items]
Long-term debt, gross	$ 0.0			$ 120.0
Stated interest rate			10.00%