Exit Activities and Discontinued Operations (Schedule of Retention Benefit Liability Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring Reserve [Roll Forward]
Other current liabilities	$ 149	$ 166
Retention Benefits
Restructuring Reserve [Roll Forward]
Retention benefit liability at beginning of period	21	14
Costs deferred as a regulatory asset	16	24
Costs paid or settled	(21)	(17)
Retention benefit liability at the end of the period	16	21
Other current liabilities	$ 7	$ 13