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Financial Instruments - Narrative (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2023
Dec. 31, 2022
Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, aggregate notional value $ 3,384 $ 4,147
Net investment hedge contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, aggregate notional value 7,630 $ 7,319
Cash flow hedges | Interest rate contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Expected transfer of gains (net of taxes) for interest rate cash flow hedges to earnings during the next 12 months $ 58  
Hedged forecasted transaction period 2 years 11 months  
Net investment hedges | Net investment hedge contracts    
Derivative Instruments, Gain (Loss) [Line Items]    
Derivative, aggregate notional value $ 7,600