Benefit Obligations (Schedule of Net Periodic Benefit Costs Recognized) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Defined Benefit Plan Disclosure [Line Items]
Actuarial (gain) loss on pension and postretirement plans	$ 81	$ 41	$ 96
Pension Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	12	13	12
Interest cost	67	54	85
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	(166)	(205)	(199)
Actuarial (gain) loss on pension and postretirement plans	91	47	97
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0	0	0
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	3	0
Special termination benefit	0	0	1
Total	4	(88)	(4)
Other Postretirement Benefits Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Service cost	1	1	1
Interest cost	1	1	1
Defined Benefit Plan, Expected Return (Loss) on Plan Assets	0	0	0
Actuarial (gain) loss on pension and postretirement plans	(10)	(6)	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0	0	(1)
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	0	0	0
Special termination benefit	0	0	0
Total	$ (8)	$ (4)	$ 0