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Investments - Pre-tax Gains and Losses for Marketable Securities (Details) - KDP - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2023
Sep. 30, 2023
Schedule of Investments [Line Items]    
Loss/(gain) on marketable securities sold during the period $ 0 $ (593)
Dividend income and other 1 (13)
Total loss/(gain) on marketable securities $ 1 $ (606)