Quarterly report pursuant to Section 13 or 15(d)

Long-Term Debt - Summary of Long-term Debt Instruments (Parenthetical) (Detail)

v3.21.1
Long-Term Debt - Summary of Long-term Debt Instruments (Parenthetical) (Detail) - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Debt Instrument [Line Items]    
Debt instrument, unamortized discount $ 30.3 $ 30.3
Unamortized discount costs 6.3 9.5
Debt issuance costs, net 7.7 7.0
Unamortized debt issuance costs 3.6 3.5
Interest accrued on current and long term debt 28.8 $ 23.3
Secured Debt [Member]    
Debt Instrument [Line Items]    
Long term debt exit fee payable $ 10.0  
Interest rate percentage on the exit fee 13.00%