Consolidated Condensed Statements of Capital (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Beginning balance	$ 4,792	$ 4,216
Net income	118	92
Equity contributions from Parent	175	155
Dividends to Parent	(85)	(88)
Ending balance	5,000	4,375
Common Stock [Member]
Beginning balance	$ 4,470	$ 3,890
Beginning balance	10	10
Equity contributions from Parent	$ 175	$ 155
Ending balance	$ 4,645	$ 4,045
Ending balance	10	10
Retained Earnings [Member]
Beginning balance	$ 323	$ 327
Net income	118	92
Dividends to Parent	(85)	(88)
Ending balance	356	331
Accumulated Other Comprehensive Loss [Member]
Beginning balance	(1)	(1)
Ending balance	$ (1)	$ (1)