Fair Value Measurements - Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Other equity investments	$ 34	$ 34
Derivatives	193	65
Derivatives	(43)	(218)
Fair Value, Recurring
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Money market funds	3,793	6,475
Other equity investments	9	9
Derivatives	193	65
Total assets	4,529	7,066
Derivatives	(43)	(218)
Total liabilities	(43)	(218)
Fair Value, Recurring | Commercial paper
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Available-for-sale debt investments:	163	165
Fair Value, Recurring | Corporate notes
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Available-for-sale debt investments:	344	335
Fair Value, Recurring | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Available-for-sale debt investments:	27	17
Fair Value, Recurring | Level 1
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Money market funds	3,793	6,475
Other equity investments	9	9
Total assets	3,802	6,484
Fair Value, Recurring | Level 2
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Derivatives	193	65
Total assets	727	582
Derivatives	(43)	(218)
Total liabilities	(43)	(218)
Fair Value, Recurring | Level 2 | Commercial paper
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Available-for-sale debt investments:	163	165
Fair Value, Recurring | Level 2 | Corporate notes
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Available-for-sale debt investments:	344	335
Fair Value, Recurring | Level 2 | U.S. government agencies
Fair Value, Assets and Liabilities Measured on Nonrecurring Basis [Line Items]
Available-for-sale debt investments:	$ 27	$ 17