Quarterly report pursuant to Section 13 or 15(d)

Employee Benefit Plans, Prepaid and Long-Term Incentives - Additional Information (Detail)

v3.21.2
Employee Benefit Plans, Prepaid and Long-Term Incentives - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Defined Benefit Plan, Plan Assets, Allocation [Line Items]          
Defined Contribution Plan, Employee contribution, percent     50.00%    
Defined Contribution Plan, Employer Discretionary Contribution Amount $ 3.1 $ 2.7 $ 10.2 $ 7.5 $ 10.4
Compensation expense 0.4 0.5 1.4 1.6  
Sales bonuses 24.3   24.3    
LTIP awards 303.7   303.7    
Pre-combination service 257.6   257.6    
Post-combination services after forfeitures 9.9   27.4    
Remaining expense 29.7   29.7    
Accrued compensation current 5.0   5.0    
Accrued compensation current and non current         8.5
Obligation Payable 6.9   6.9   11.9
Cash payment for LTIP     $ 31.0 114.7  
LTIPs, termination date     Aug. 10, 2021    
All Risks Long-Term Incentive Plans [Member]          
Defined Benefit Plan, Plan Assets, Allocation [Line Items]          
Compensation expense   $ 2.9   $ 2.9  
LTIP awards $ 150.6   $ 150.6   $ 154.2