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Income Taxes - Schedule of Tax Rate Reconciliation (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Income Tax Disclosure [Abstract]      
Federal tax provision at statutory rate $ 286.0 $ 363.3 $ 311.7
State taxes, net of federal income tax benefit 39.5 76.9 85.4
Non-deductible items 10.8 5.0 4.8
Permanent differences related to share-based compensation 0.0 (2.4) (2.6)
Net change in valuation allowance 19.9 25.0 25.3
General business credits (5.3) (2.6) (2.3)
Foreign rate differential 3.1 1.4 0.5
Other (3.4) 1.8 (0.7)
Total $ 350.6 $ 468.4 $ 422.1