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Debt - Summary of Debt (Details) - USD ($)
$ in Millions
Oct. 31, 2021
Jan. 31, 2021
Debt Instrument [Line Items]    
Long-term debt, Principal $ 1,481.3 $ 2,298.0
Unamortized Discount and Debt Issuance Costs 22.3 46.3
Long-term Debt 1,496.3 2,311.0
Senior Term Loan due August 2024 | Term loan    
Debt Instrument [Line Items]    
Current maturities of long-term debt, Principal 0.0 13.0
Long-term debt, Principal 0.0 1,248.0
Unamortized Discount and Debt Issuance Costs 0.0 19.1
Senior Notes due September 2024 | Senior notes    
Debt Instrument [Line Items]    
Long-term debt, Principal 0.0 300.0
Unamortized Discount and Debt Issuance Costs 0.0 8.9
Senior Notes due August 2025 | Senior notes    
Debt Instrument [Line Items]    
Long-term debt, Principal 0.0 750.0
Unamortized Discount and Debt Issuance Costs 0.0 14.8
ABL Credit Facility due July 2026 | Revolving credit facility    
Debt Instrument [Line Items]    
Long-term debt, Principal 0.0 0.0
Unamortized Discount and Debt Issuance Costs 0.0 3.5
Senior Term Loan due July 2028 | Term loan    
Debt Instrument [Line Items]    
Current maturities of long-term debt, Principal 15.0 0.0
Long-term debt, Principal 1,481.3 0.0
Unamortized Discount and Debt Issuance Costs $ 22.3 $ 0.0