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Income Taxes - Schedule of components of income tax expense (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Current:      
Federal $ 968.5 $ 1,429.8 $ 199.0
State 7.4 6.2 1.2
Foreign 290.9 (38.4) 21.4
Total current tax expense 1,266.8 1,397.6 221.6
Deferred:      
Federal (797.7) (423.2) 109.0
State (2.7) (0.6) (2.0)
Foreign 54.0 276.7 (31.4)
Total deferred tax (benefit) expense (746.4) (147.1) 75.6
Total income tax expense (benefit) $ 520.4 $ 1,250.5 $ 297.2