CONSOLIDATED STATEMENTS OF COMMON STOCKHOLDERS' EQUITY (UNAUDITED) - USD ($) $ in Millions	Total	Common Stock	Additional Paid In Capital	Retained Earnings	Accumulated Other Comprehensive Loss
Beginning balance (in shares) at Dec. 31, 2021		100
Beginning balance at Dec. 31, 2021	$ 3,603	$ 0	$ 3,091	$ 513	$ (1)
Increase (Decrease) in Stockholders' Equity
Net income	52			52
Dividends declared to parent	(53)			(53)
Contributions of capital by parent	8		8
Ending balance (in shares) at Mar. 31, 2022		100
Ending balance at Mar. 31, 2022	$ 3,610	$ 0	3,099	512	(1)
Beginning balance (in shares) at Dec. 31, 2022	100	100
Beginning balance at Dec. 31, 2022	$ 3,850	$ 0	3,311	540	(1)
Increase (Decrease) in Stockholders' Equity
Net income	54			54
Dividends declared to parent	$ (66)			(66)
Ending balance (in shares) at Mar. 31, 2023	100	100
Ending balance at Mar. 31, 2023	$ 3,838	$ 0	$ 3,311	$ 528	$ (1)