Pension And Postretirement Benefits (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Defined Benefit Plan Disclosure [Line Items]
Increase (Decrease) in Obligation, Other Postretirement Benefits	$ 2,400
Actuarial Gain (Loss)			$ 3,838	$ 3,021
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	(216)	$ (374)	(2,573)	(3,021)
Net periodic benefit (credit) costs	(151)	(364)	(806)	(1,051)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Actuarial Gain (Loss), Immediate Recognition as Component in Net Periodic Benefit (Cost) Credit	(1,084)	0	(1,084)	0
Net periodic benefit (credit) costs	(638)	(608)	(1,723)	(1,825)
Supplemental Retirement and Savings Plans
Defined Benefit Plan Disclosure [Line Items]
Net periodic benefit (credit) costs	13	$ 12	37	$ 35
Actuarial Gain (Loss)	$ 140		$ 181