Consolidated Condensed Statements of Capital (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Beginning balance	$ 3,695	$ 3,303
Net income	77	64
Equity contributions from Parent	145	110
Dividends to Parent	(73)	(76)
Other	1
Ending balance	3,845	3,401
Common Stock [Member]
Beginning balance	$ 3,385	$ 2,990
Beginning balance	10	10
Equity contributions from Parent	$ 145	$ 110
Ending balance	$ 3,530	$ 3,100
Ending balance	10	10
Retained Earnings [Member]
Beginning balance	$ 311	$ 314
Net income	77	64
Dividends to Parent	(73)	(76)
Other	1
Ending balance	316	302
Accumulated Other Comprehensive Loss [Member]
Beginning balance	(1)	(1)
Ending balance	$ (1)	$ (1)