CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDER'S EQUITY - USD ($) $ in Millions	Total	Common stock	Additional Paid In Capital	Retained Earnings
Balance (in shares) at Dec. 31, 2021		933,000
Beginning Balance at Dec. 31, 2021	$ 1,103	$ 93	$ 642	$ 368
Increase (Decrease) in Stockholder's Equity
Net income	47			47
Common dividends declared to parent	(22)			(22)
Contribution of capital by parent	30		30
Balance (in shares) at Mar. 31, 2022		933,000
Ending Balance at Mar. 31, 2022	$ 1,158	$ 93	672	393
Balance (in shares) at Dec. 31, 2022	933,000	933,000
Beginning Balance at Dec. 31, 2022	$ 1,259	$ 93	761	405
Increase (Decrease) in Stockholder's Equity
Net income	45			45
Common dividends declared to parent	(24)			(24)
Contribution of capital by parent	$ 30		30
Balance (in shares) at Mar. 31, 2023	933,000	933,000
Ending Balance at Mar. 31, 2023	$ 1,310	$ 93	$ 791	$ 426