Derivative Instruments And Hedging Activities - Cumulative Amount of Unrecognized Hedge Losses Recorded in AOCI (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	$ (500)	$ (638)
Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	(235)	233
Net Investment Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	(194)	275
Net Investment Hedging | Currency Swap | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	(161)	178
Net Investment Hedging | Foreign Exchange Forward | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	29	29
Net Investment Hedging | Long-term debt | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	(62)	68
Cash Flow Hedging | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	(41)	(42)
Cash Flow Hedging | Currency Swap | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	1	1
Cash Flow Hedging | Interest Rate Contract [Member] | Designated as Hedging Instrument
Derivative [Line Items]
Cumulative Gains (Losses), net of tax	$ (42)	$ (43)