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Income Taxes - Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Income Tax Disclosure [Abstract]      
Federal tax provision at statutory rate $ 363.3 $ 311.7 $ 136.2
State taxes, net of federal income tax benefit 76.9 85.4 40.4
Non-deductible items 5.0 4.8 2.8
Permanent differences related to stock compensation (2.4) (2.6) (0.5)
Net change in valuation allowance 25.0 25.3 0.5
General business credits (2.6) (2.3) (1.3)
Foreign Rate Differential 1.4 0.5 0.0
Other 1.8 (0.7) 0.1
Total $ 468.4 $ 422.1 $ 178.2