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Income Taxes - Effective Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Effective Income Tax Rate Reconciliation, Amount [Abstract]      
Statutory federal income tax rate, amount $ 272.5 $ 210.5 $ 199.4
State taxes, net of federal effect, amount 50.3 36.0 35.4
Equity based compensation, amount (30.1) (28.8) (26.8)
Foreign withholding tax, amount 1.7 1.0 2.1
Effect of US Tax Cuts and Jobs Act on Deferred Taxes, amount 4.8 (6.8) 0.0
Other, amount 10.0 1.9 2.8
Income tax expense $ 309.2 $ 213.8 $ 212.9
Effective Income Tax Rate Reconciliation, Percent [Abstract]      
Statutory federal income tax rate, percent 21.00% 21.00% 21.00%
State taxes, net of federal effect, percent 3.90% 3.60% 3.70%
Equity based compensation, percent (2.30%) (2.90%) (2.80%)
Foreign withholding tax, percent 0.10% 0.10% 0.20%
Effect of TCJA on deferred taxes and repatriation tax, percent 0.004 (0.007) 0
Other, percent 0.70% 0.20% 0.30%
Income tax expense, rate 23.80% 21.30% 22.40%