Exit Activities and Asset Sales (Schedule of Retention Benefit Liability Roll Forward) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Restructuring Reserve [Roll Forward]
Other current liabilities	$ 239		$ 239		$ 209
Retention Benefits
Restructuring Reserve [Roll Forward]
Retention benefit liability at beginning of period			14	$ 16
Costs deferred as a regulatory asset	1	$ 3	4	6
Retention benefit liability at the end of the period	18	22	18	22
Other current liabilities	$ 18	$ 9	$ 18	$ 9