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, 2022		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
Ending balance at Mar. 31, 2023	$ 3,838	$ 0	3,311	528	(1)
Beginning balance (in shares) at Dec. 31, 2023	100	100
Beginning balance at Dec. 31, 2023	$ 3,986	$ 0	3,370	617	(1)
Increase (Decrease) in Stockholders' Equity
Net income	57			57
Dividends declared to parent	$ (89)			(89)
Ending balance (in shares) at Mar. 31, 2024	100	100
Ending balance at Mar. 31, 2024	$ 3,954	$ 0	$ 3,370	$ 585	$ (1)