Financial Instruments - Schedule of Financial Assets Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Level 2
Debt Securities, Available-for-sale [Line Items]
Total	$ 6,910	$ 8,135
Certificates of deposit \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	53	91
U.S. treasury bills \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	590	653
U.S. treasury notes \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,123	2,190
Corporate debt securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,366	2,540
Government debt securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	55	66
Fair Value, Recurring
Debt Securities, Available-for-sale [Line Items]
Derivative instruments	2	1
Total	6,838	7,925
Derivative instruments		4
Fair Value, Recurring \| Level 1
Debt Securities, Available-for-sale [Line Items]
Derivative instruments	0	0
Total	1,449	969
Derivative instruments		0
Fair Value, Recurring \| Level 2
Debt Securities, Available-for-sale [Line Items]
Derivative instruments	2	1
Total	5,389	6,956
Derivative instruments		4
Fair Value, Recurring \| Money market funds
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	1,447	963
Fair Value, Recurring \| Money market funds \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	1,447	963
Fair Value, Recurring \| Money market funds \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	0	0
Fair Value, Recurring \| Certificates of deposit
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	53	91
Fair Value, Recurring \| Certificates of deposit \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	0	0
Fair Value, Recurring \| Certificates of deposit \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	53	91
Fair Value, Recurring \| U.S. treasury bills
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	716	1,445
Fair Value, Recurring \| U.S. treasury bills \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	0	0
Fair Value, Recurring \| U.S. treasury bills \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	716	1,445
Fair Value, Recurring \| U.S. treasury notes
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,123	2,190
Fair Value, Recurring \| U.S. treasury notes \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	0	0
Fair Value, Recurring \| U.S. treasury notes \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,123	2,190
Fair Value, Recurring \| Corporate debt securities
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,440	3,163
Fair Value, Recurring \| Corporate debt securities \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	0	0
Fair Value, Recurring \| Corporate debt securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2,440	3,163
Fair Value, Recurring \| Government debt securities
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	55	66
Fair Value, Recurring \| Government debt securities \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	0	0
Fair Value, Recurring \| Government debt securities \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	55	66
Fair Value, Recurring \| Equity investments
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2	6
Fair Value, Recurring \| Equity investments \| Level 1
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	2	6
Fair Value, Recurring \| Equity investments \| Level 2
Debt Securities, Available-for-sale [Line Items]
Estimated Fair Value	$ 0	$ 0

Fair value portion of asset recognized for present right to economic benefit.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets not subject to a master netting arrangement and not elected to be offset.

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