Financial Instruments - Amortized Cost to Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Debt Securities, Available-for-Sale [Line Items]
Fair Value	$ 89,822
Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)
Debt Securities, Available-for-Sale [Line Items]
Adjusted Cost	85,123	$ 62,505
Gross Unrealized Gains	859	225
Gross Unrealized Losses	(186)	(821)
Fair Value	85,796	61,909
Time deposits \| Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)
Debt Securities, Available-for-Sale [Line Items]
Adjusted Cost	3,353	2,217
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Fair Value	3,353	2,217
Government bonds \| Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)
Debt Securities, Available-for-Sale [Line Items]
Adjusted Cost	49,087	27,551
Gross Unrealized Gains	443	83
Gross Unrealized Losses	(26)	(214)
Fair Value	49,504	27,420
Corporate debt securities \| Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)
Debt Securities, Available-for-Sale [Line Items]
Adjusted Cost	18,346	18,300
Gross Unrealized Gains	242	79
Gross Unrealized Losses	(32)	(222)
Fair Value	18,556	18,157
Mortgage-backed and asset-backed securities \| Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)
Debt Securities, Available-for-Sale [Line Items]
Adjusted Cost	14,337	14,437
Gross Unrealized Gains	174	63
Gross Unrealized Losses	(128)	(385)
Fair Value	$ 14,383	$ 14,115

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on 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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