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Income Taxes - Provision for Income Taxes (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Current:      
Federal $ 349 $ 297 $ 209
State 55 40 31
Total current 404 337 240
Deferred:      
Federal (28) (66) (17)
State (3) 0 (7)
Total deferred (31) (66) (24)
Income tax expense $ 373 $ 271 $ 216