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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, 2022 USD ($) | Dec. 31, 2021 USD ($)
--- | --- | ---
Environmental Remediation Obligations [Abstract] |  |
Current | $ 54 | $ 46
Non-current | 228 | 247
Total environmental liabilities | $ 282 | $ 293
Site Contingency, Number of Sites Needing Remediation | 31 |

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