Condensed Statements of Capitalization (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Beginning balance	$ 5,322	$ 4,723
Net Income (Loss)	114	63
Equity contributions from Parent	150	300
Dividends to Parent	(84)	(85)
Ending balance	5,502	5,001
Common Stock [Member]
Beginning balance	$ 5,105	$ 4,505
Beginning balance	10	10
Equity contributions from Parent	$ 150	$ 300
Ending balance	$ 5,255	$ 4,805
Ending balance	10	10
Retained Earnings [Member]
Beginning balance	$ 218	$ 219
Net Income (Loss)	114	63
Dividends to Parent	(84)	(85)
Ending balance	248	197
Accumulated Other Comprehensive Loss [Member]
Beginning balance	(1)	(1)
Ending balance	$ (1)	$ (1)