v3.26.3
Financial Instruments - Amortized Cost to Fair Value (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Debt Securities, Available-for-Sale [Line Items]    
Fair Value $ 118,380  
Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 139,858 $ 85,123
Gross Unrealized Gains 34 859
Gross Unrealized Losses (2,576) (186)
Fair Value 137,316 85,796
Time deposits | Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 5,080 3,353
Gross Unrealized Gains 0 0
Gross Unrealized Losses 0 0
Fair Value 5,080 3,353
Government bonds | Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 89,823 49,087
Gross Unrealized Gains 2 443
Gross Unrealized Losses (1,371) (26)
Fair Value 88,454 49,504
Corporate debt securities | Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 24,308 18,346
Gross Unrealized Gains 15 242
Gross Unrealized Losses (425) (32)
Fair Value 23,898 18,556
Mortgage-backed and asset-backed securities | Gain (Loss) Accounted For Through Other Comprehensive Income (Loss)    
Debt Securities, Available-for-Sale [Line Items]    
Adjusted Cost 20,647 14,337
Gross Unrealized Gains 17 174
Gross Unrealized Losses (780) (128)
Fair Value $ 19,884 $ 14,383