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Supplemental Financial Information - Other Non-Current Liabilities (Details) - USD ($) $ in Millions | Mar. 31, 2024 | Dec. 31, 2023
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Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Voluntary Separation Program | $ 40 | $ 61
Postretirement obligation | 273 | 269
Other deferred compensation | 358 | 358
Other | 266 | 293
Other noncurrent liabilities | $ 937 | $ 981

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