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Pension, OPEB and Savings Plans (Pre-Tax Changes Recognized In Accumulated Other Comprehensive Income (Loss), Regulatory Assets And Deferred Assets) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Pension Benefits [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net Actuarial (Gain) Loss in Current Period | $ 568 | $ (608)
Amortization of Net Actuarial Gain (Loss) | (60) | (103)
Prior Service Cost (Credit) in Current Period | 0 | 0
Amortization of Prior Service Credit | 0 | 0
Total | 508 | (711)
Other Benefits [Member] |  |
Defined Benefit Plan Disclosure [Line Items] |  |
Net Actuarial (Gain) Loss in Current Period | (138) | (127)
Amortization of Net Actuarial Gain (Loss) | (14) | (44)
Prior Service Cost (Credit) in Current Period | 0 | 0
Amortization of Prior Service Credit | 129 | 129
Total | $ (23) | $ (42)

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