Derivative Instruments And Hedging Activities - Gains (Losses) Recognized in AOCI and Reclassified from AOCI on Derivatives (Detail) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Derivative Instruments, Gain (Loss) [Line Items]
Total, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	$ 95	$ (130)
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Total, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	14	14
Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	95	(130)
Net investment hedges - reclassification of gains included in net income - Net of Tax	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	14	14
Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	0	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0
Cross currency swaps | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	74	(88)
Net investment hedges - reclassification of gains included in net income - Net of Tax	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	14	14
Cross currency swaps | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	0	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0
Long-term debt | Net Investment Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Net Investment Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	21	(42)
Net investment hedges - reclassification of gains included in net income - Net of Tax	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0
Interest rate contracts | Cash Flow Hedging
Derivative Instruments, Gain (Loss) [Line Items]
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	0	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	$ 0	$ 0