Exit Activities and Discontinued Operations (Schedule of Retention Benefit Liability Roll Forward) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Restructuring Reserve [Roll Forward]
Other current liabilities	$ 186		$ 186		$ 149
Retention Benefits
Restructuring Reserve [Roll Forward]
Retention benefit liability at beginning of period			16	$ 21
Costs deferred as a regulatory asset	1	$ 5	3	10
Retention benefit liability at the end of the period	19	31	19	31
Other current liabilities	$ 8	$ 18	$ 8	$ 18