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Derivative Instruments - Narrative (Details) - USD ($)
$ in Millions
Oct. 31, 2023
Jan. 31, 2023
Derivative [Line Items]    
Net gains on cash flow hedges estimated to be reclassified into income within the next 12 months $ 33  
Non-designated hedges | Long    
Derivative [Line Items]    
Derivative, notional amount 125 $ 235
Non-designated hedges | Short    
Derivative [Line Items]    
Derivative, notional amount 1 2
Cash flow hedges | Cash flow hedges | Long    
Derivative [Line Items]    
Derivative, notional amount 2,200 1,700
Cash flow hedges | Cash flow hedges | Short    
Derivative [Line Items]    
Derivative, notional amount $ 369 $ 324
Cash flow hedges | Cash flow hedges | Maximum    
Derivative [Line Items]    
Derivative, remaining maturity (in months) 48 months