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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, 2024
USD ($)
Dec. 31, 2023
USD ($)
Environmental Remediation Obligations [Abstract]    
Current $ 51 $ 42
Non-current 227 235
Total environmental liabilities $ 278 $ 277
Site Contingency, Number of Sites Needing Remediation 31