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Financial Instruments - Cumulative Basis Adjustments for Fair Value Hedges (Details) - USD ($)
$ in Millions
Jun. 30, 2024
Dec. 31, 2023
Fair Value Disclosures [Abstract]    
Carrying Amount of Actively Hedged Liabilities [1] $ 7,175 $ 7,196
Cumulative Amount of Fair Value Hedging Adjustment Increase/(Decrease) to Carrying Amount, Active Hedging Relationships, Liability (355) (131)
Cumulative Amount of Fair Value Hedging Adjustment Increase/(Decrease) to Carrying Amount, Discontinued Hedging Relationships, Liability $ 924 $ 957
[1] Carrying amounts exclude the cumulative amount of fair value hedging adjustments.