Consolidated Condensed Statements of Capital (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Beginning balance	$ 5,133	$ 4,538	$ 4,792	$ 4,216
Net income	169	149	432	362
Equity contributions from Parent	190	150	470	440
Dividends to Parent	(146)	(121)	(348)	(302)
Ending balance	5,346	4,716	5,346	4,716
Common Stock [Member]
Beginning balance	$ 4,750	$ 4,180	$ 4,470	$ 3,890
Beginning balance	10	10	10	10
Equity contributions from Parent	$ 190	$ 150	$ 470	$ 440
Ending balance	$ 4,940	$ 4,330	$ 4,940	$ 4,330
Ending balance	10	10	10	10
Retained Earnings [Member]
Beginning balance	$ 384	$ 359	$ 323	$ 327
Net income	169	149	432	362
Dividends to Parent	(146)	(121)	(348)	(302)
Ending balance	407	387	407	387
Accumulated Other Comprehensive Loss [Member]
Beginning balance	(1)	(1)	(1)	(1)
Ending balance	$ (1)	$ (1)	$ (1)	$ (1)