Exit Activities (Schedule of Retention Benefit Liability Roll Forward) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024
Restructuring Reserve [Roll Forward]
Other current liabilities	$ 226		$ 209
Retention Benefits
Restructuring Reserve [Roll Forward]
Retention benefit liability at beginning of period	14	$ 16
Costs deferred as a regulatory asset	2	3
Retention benefit liability at the end of the period	16	19
Other current liabilities	$ 16	$ 8