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Derivative and Financial Instruments - Financial Instruments, Amortized Cost Basis and Fair Value of Investments in Debt Securities Classified as Available for Sale (Details) - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | $ 1,592 | $ 1,548
Fair Value | 1,601 | 1,551
Corporate Bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | 953 | 947
Fair Value | 959 | 950
Commercial Paper |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | 72 | 79
Fair Value | 72 | 79
U.S. Government Obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | 268 | 262
Fair Value | 270 | 261
U.S. Government Agency Obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | 1 | 7
Fair Value | 1 | 7
Foreign Government Obligations |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | 18 | 16
Fair Value | 18 | 16
Asset-backed Securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost Basis | 280 | 237
Fair Value | $ 281 | $ 238

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