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Assets and Liabilities Measured at Fair Value (Details) - USD ($) $ in Millions | 3 Months Ended |  |  |
--- | --- | --- | --- | ---
Mar. 31, 2024 | Mar. 31, 2023 | Dec. 31, 2023 | Sep. 30, 2023 | Feb. 28, 2023
1.75% Exchangeable Senior Debentures due 2046 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Interest rate (as a percent) |  | 1.75% |  |  |
1.25% Exchangeable Senior Debentures due 2050 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Interest rate (as a percent) |  |  |  | 1.25% |
2.75% Exchangeable Senior Debentures due 2050 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Interest rate (as a percent) |  | 2.75% |  |  |
3.125% Exchangeable Senior Debentures due 2053 |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Interest rate (as a percent) | 3.125% |  | 3.125% |  | 3.125%
Exchangeable senior debentures |  |  |  |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |  |  |  |
Change in fair value | $ (20) | $ 64 |  |  |
Cumulative change | $ 35 |  |  |  |

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