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Income Taxes - Reconciliation of Statutory Tax Rate to Effective Tax Rate (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Amount      
Statutory U.S. federal income tax $ 121.2 $ 172.9 $ 95.0
State income taxes, net of federal benefit 12.5 21.0 9.9
Foreign tax differential 2.9 4.6 2.8
Change in valuation allowances 1.3 4.9 5.5
Uncertain tax positions and interest (19.2) 6.5 0.5
Subpart F income 0.0 0.0 3.3
Global Intangible Low-Taxed Income ("GILTI") 3.2 1.5 0.0
GILTI High-Taxed Exception 0.0 0.0 (8.6)
Stock compensation (13.8) (8.1) (10.9)
Nondeductible compensation 14.6 5.1 3.7
Permanent and other (3.7) (10.1) 1.4
Effective income tax provision $ 119.0 $ 198.3 $ 102.6
Percentage of Income Before Income Taxes      
Statutory U.S. federal income tax (percentage) 21.00% 21.00% 21.00%
State income taxes, net of federal benefit (percentage) 2.20% 2.60% 2.20%
Foreign tax differential (percentage) 0.50% 0.60% 0.60%
Change in valuation allowance (percentage) 0.20% 0.60% 1.20%
Uncertain tax positions (percentage) (3.30%) 0.80% 0.10%
Subpart F income (percentage) 0.00% 0.00% 0.70%
Global Intangible Low-Taxed Income (percentage) 0.50% 0.20% 0.00%
Retro-active High Taxed Exception - GILTI (percentage) 0.00% 0.00% (1.90%)
Stock compensation (percentage) (2.40%) (1.00%) (2.40%)
Nondeductible compensation (percentage) 2.50% 0.60% 0.80%
Permanent and other (percentage) (0.60%) (1.30%) 0.40%
Effective income tax provision (percentage) 20.60% 24.10% 22.70%