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Income Taxes - Income Source (Detail) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Income Taxes      
Domestic $ 3,325 $ 2,878 $ 2,779
Foreign 133 143 139
Income before income taxes $ 3,458 $ 3,021 $ 2,918