Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation - RSUs to be Settled in Cash (Details)

v3.21.2
Stock-Based Compensation - RSUs to be Settled in Cash (Details) - Restricted Stock Units to be Settled in Cash - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Compensation expense related to RSUs to be settled in cash $ 13.7 $ 5.3  
Payments to settle liabilities under compensation plan 13.2 $ 4.3  
Accrued liabilities under compensation plan $ 7.4   $ 8.7