Derivative Instruments And Hedging Activities - Gains (Losses) Recognized in AOCI and Reclassified from AOCI on Derivatives (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Derivative Instruments, Gain (Loss) [Line Items]
Total, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	$ 32	$ (28)	$ 106	$ (85)
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	1	(1)	0
Total, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	1	(1)	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	11	14	22	30
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	32	(28)	106	(85)
Net investment hedges - reclassification of gains included in net income - Net of Tax	0	0	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	11	14	22	30
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	0	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	1	(1)	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	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	24	(24)	75	(63)
Net investment hedges - reclassification of gains included in net income - Net of Tax	0	0	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	11	14	22	30
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	0	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	1	0	1
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	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	8	(4)	31	(22)
Net investment hedges - reclassification of gains included in net income - Net of Tax	0	0	0	0
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0	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	0	0
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	0	0	(1)	(1)
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	$ 0	$ 0	$ 0	$ 0