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)