v3.26.1
Derivative Instruments and Hedging Activities - Effect of Derivative Instruments Designated as Cash Flow Hedges and Not Designated as Hedges on Consolidated Statement of Income (Detail) - Cash Flow Hedging - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Derivatives designated as hedges        
Derivative Instruments Gain Loss [Line Items]        
Gain (Loss) Recognized in Income $ (63) $ 316 $ (185) $ 429
Derivatives designated as hedges | Cross currency interest rate swaps        
Derivative Instruments Gain Loss [Line Items]        
Gain (Loss) Recognized in Income $ (40) $ 330 $ (143) $ 467
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Cost of services and sales Cost of services and sales Cost of services and sales Cost of services and sales
Derivatives designated as hedges | Cross currency interest rate swaps        
Derivative Instruments Gain Loss [Line Items]        
Gain (Loss) Recognized in Income $ (18) $ (18) $ (35) $ (37)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Interest Interest Interest Interest
Derivatives designated as hedges | Foreign currency forward contracts        
Derivative Instruments Gain Loss [Line Items]        
Gain (Loss) Recognized in Income $ (19) $ 0 $ (35) $ (1)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Cost of services and sales Cost of services and sales Cost of services and sales Cost of services and sales
Derivatives designated as hedges | Foreign currency forward contracts        
Derivative Instruments Gain Loss [Line Items]        
Gain (Loss) Recognized in Income $ 14 $ 4 $ 28 $ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Total Revenue Total Revenue Total Revenue Total Revenue
Derivatives not designated as hedges | Foreign currency forward contracts        
Derivative Instruments Gain Loss [Line Items]        
Gain (Loss) Recognized in Income $ 13 $ (17) $ 8 $ 42
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] Cost of services and sales Cost of services and sales Cost of services and sales Cost of services and sales