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, 2023	Mar. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Total, Amount of Gain/(Loss) Recognized in AOCI on Derivative, net of Tax	$ (57)	$ 47
Cash Flow Hedging Relationships, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	(1)
Total, Amount of Gain/(Loss) Reclassified from AOCI into Income, net of Tax	(1)	(1)
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	16	10
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	(57)	47
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)	16	10
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)	(1)
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	0	0
Currency Swap | 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	(39)	24
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)	16	10
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	(18)	23
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)	(1)
Gain Recognized in Income on Derivative (Amount Excluded from Effectiveness Testing)	$ 0	$ 0