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	145			145
Dividends declared to parent	(111)			(111)
Contributions of capital by parent	210		210
Ending balance (in shares) at Jun. 30, 2022		100
Ending balance at Jun. 30, 2022	3,847	$ 0	3,301	547	(1)
Beginning balance (in shares) at Mar. 31, 2022		100
Beginning balance at Mar. 31, 2022	3,610	$ 0	3,099	512	(1)
Increase (Decrease) in Stockholders' Equity
Net income	93			93
Dividends declared to parent	(58)			(58)
Contributions of capital by parent	202		202
Ending balance (in shares) at Jun. 30, 2022		100
Ending balance at Jun. 30, 2022	$ 3,847	$ 0	3,301	547	(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	135			135
Dividends declared to parent	(168)			(168)
Contributions of capital by parent	$ 8		8
Ending balance (in shares) at Jun. 30, 2023	100	100
Ending balance at Jun. 30, 2023	$ 3,825	$ 0	3,319	507	(1)
Beginning balance (in shares) at Mar. 31, 2023		100
Beginning balance at Mar. 31, 2023	3,838	$ 0	3,311	528	(1)
Increase (Decrease) in Stockholders' Equity
Net income	81			81
Dividends declared to parent	(102)			(102)
Contributions of capital by parent	$ 8		8
Ending balance (in shares) at Jun. 30, 2023	100	100
Ending balance at Jun. 30, 2023	$ 3,825	$ 0	$ 3,319	$ 507	$ (1)