STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Millions	Total	Common stock	Additional Paid In Capital	Retained Earnings	AOCI Attributable to Parent
Beginning Balance (in shares) at Dec. 31, 2018		100
Beginning Balance at Dec. 31, 2018	$ 2,537	$ 0	$ 1,932	$ 606	$ (1)
Increase (Decrease) in Stockholder's Equity
Net Income (Loss) Attributable to Parent	263			263
Common dividends declared to parent	(334)			(334)
Contribution of capital by parent	419		419
Ending Balance (in shares) at Dec. 31, 2019		100
Ending Balance at Dec. 31, 2019	2,885	$ 0	2,351	535	(1)
Increase (Decrease) in Stockholder's Equity
Net Income (Loss) Attributable to Parent	295			295
Common dividends declared to parent	(321)			(321)
Contribution of capital by parent	$ 439		439
Ending Balance (in shares) at Dec. 31, 2020	100	100
Ending Balance at Dec. 31, 2020	$ 3,298	$ 0	2,790	509	(1)
Increase (Decrease) in Stockholder's Equity
Net Income (Loss) Attributable to Parent	318			318
Common dividends declared to parent	(314)			(314)
Contribution of capital by parent	$ 301		301
Ending Balance (in shares) at Dec. 31, 2021	100	100
Ending Balance at Dec. 31, 2021	$ 3,603	$ 0	$ 3,091	$ 513	$ (1)