Summary of Significant Accounting Policies Fair Values of Derivative Instruments Included on Consolidated Balance Sheet (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 484
Asset Derivatives Fair Value	131	$ 334
Liability Derivatives Fair Value	(145)	(41)
Debt Instrument, Collateral Amount	79
AOCI, Cash Flow Hedge, Cumulative Gain (Loss), after Tax	13
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	27	199
Liability Derivatives Fair Value	(145)	(41)
Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	104	135
Liability Derivatives Fair Value	0	0
Royalty Arrangement
Derivatives, Fair Value [Line Items]
Derivative, Notional Amount	$ 2,000
Period covered by hedge	18 months
Foreign currency \| Prepaid expenses and other current assets \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	$ 3	125
Foreign currency \| Accrued payroll and other liabilities \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	(117)	(1)
Foreign currency \| Miscellaneous other assets \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	24	40
Foreign currency \| Other long- term liabilities \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	(12)	0
Interest rate \| Prepaid expenses and other current assets \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	0	34
Interest rate \| Accrued payroll and other liabilities \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	0	(6)
Interest rate \| Miscellaneous other assets \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	0	0
Interest rate \| Other long- term liabilities \| Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Liability Derivatives Fair Value	(16)	(34)
Equity \| Prepaid expenses and other current assets \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	0	135
Equity \| Miscellaneous other assets \| Not Designated as Hedging Instrument [Member]
Derivatives, Fair Value [Line Items]
Asset Derivatives Fair Value	104	$ 0
Fair Value Hedging \| Interest Rate Risk [Member]
Derivatives, Fair Value [Line Items]
Increase (Decrease) in Fair Value of Interest Rate Fair Value Hedging Instruments	(16)
Gain (Loss) Recognized in Income on Derivative	24
Net Investment Hedging Relationships
Derivatives, Fair Value [Line Items]
Notional Amount of Nonderivative Instruments	1,900
Debt [Member]
Derivatives, Fair Value [Line Items]
Notional Amount of Nonderivative Instruments	$ 15,400

Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount of unrealized gain (loss) related to the fair value of interest rate derivatives designated as fair value hedging instruments, as offset by the gain (loss) on the hedged item to the extent that the fair value hedge is determined to be effective.

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