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
	Mar. 31, 2025	Mar. 31, 2024
Derivatives designated as hedges
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ 112	$ (115)
Derivatives designated as hedges | Cross currency interest rate swaps
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ 136	$ (94)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	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	$ (19)	$ (21)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Interest	Interest
Derivatives designated as hedges | Commodity contracts
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income		$ (3)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total Revenue	Total Revenue
Derivatives designated as hedges | Foreign currency forward contracts
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ (1)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	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	$ (4)	$ 3
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Total Revenue	Total Revenue
Derivatives not designated as hedges | Foreign currency forward contracts
Derivative Instruments Gain Loss [Line Items]
Gain (Loss) Recognized in Income	$ 25	$ 5
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of services and sales	Cost of services and sales