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Debt - Schedule of Carrying Values and Estimated Fair Values of Debt Instruments (Details) - Senior Notes [Member] - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Carrying Amount [Member] | Fair Value, Inputs, Level 2 and Level 3 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Carrying Amount, Debt | [1] | $ 14,880 | $ 15,232
Estimated Fair Value [Member] | Fair Value, Inputs, Level 2 and Level 3 |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Senior Notes, Estimated Fair Value | [2] | 14,862 | 14,803
Estimated Fair Value [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Senior Notes, Estimated Fair Value |  | $ 1,300 | $ 1,300
[1] | Carrying amounts exclude unamortized discount and debt issuance costs.
[2] | As of both September 30, 2025 and December 31, 2024, $1.3 billion of the fair value of our senior notes were classified as Level 3 since these senior notes were valued by applying an unobservable illiquidity adjustment to the price derived from trades or indicative bids of instruments with similar terms, maturities and credit standing. The remainder of the fair value of our senior notes was classified as Level 2, based on prices derived from trades or indicative bids of the instruments.

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