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Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Regulatory Matters, Commitments, Contingencies And Environemental Liabilities (Environmental Liabilities) (Details) $ in Millions | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | ---
Environmental Remediation Obligations [Abstract] |  |
Current | $ 42 | $ 54
Non-current | 235 | 228
Total environmental liabilities | $ 277 | $ 282
Site Contingency, Number of Sites Needing Remediation | 32 |

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