UNAUDITED INTERIM CONSOLIDATED STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Common   Stock	Additional   Paid-in Capital	Retained Deficit	Accumulated Other Comprehensive   Loss
Beginning Balance at Dec. 31, 2022	$ 1,587	$ 3	$ 1,759	$ (286)	$ 111
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Distribution to parent	(45)		(45)
Comprehensive income (loss):
Net income (loss)	7			7
Other comprehensive income (loss), net of taxes	17				17
Total comprehensive income (loss)	24
Ending Balance at Mar. 31, 2023	1,566	3	1,714	(279)	128
Beginning Balance at Dec. 31, 2022	1,587	3	1,759	(286)	111
Comprehensive income (loss):
Net income (loss)	137
Other comprehensive income (loss), net of taxes	(73)
Ending Balance at Jun. 30, 2023	1,606	3	1,714	(149)	38
Beginning Balance at Mar. 31, 2023	1,566	3	1,714	(279)	128
Comprehensive income (loss):
Net income (loss)	130			130
Other comprehensive income (loss), net of taxes	(90)				(90)
Total comprehensive income (loss)	40
Ending Balance at Jun. 30, 2023	1,606	3	1,714	(149)	38
Beginning Balance at Dec. 31, 2023	1,362	3	1,714	(290)	(65)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent	(75)			(75)
Comprehensive income (loss):
Net income (loss)	145			145
Other comprehensive income (loss), net of taxes	(10)				(10)
Total comprehensive income (loss)	135
Ending Balance at Mar. 31, 2024	1,422	3	1,714	(220)	(75)
Beginning Balance at Dec. 31, 2023	1,362	3	1,714	(290)	(65)
Comprehensive income (loss):
Net income (loss)	115
Other comprehensive income (loss), net of taxes	38
Ending Balance at Jun. 30, 2024	1,365	3	1,714	(325)	(27)
Beginning Balance at Mar. 31, 2024	1,422	3	1,714	(220)	(75)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent	(75)			(75)
Comprehensive income (loss):
Net income (loss)	(30)			(30)
Other comprehensive income (loss), net of taxes	48				48
Total comprehensive income (loss)	18
Ending Balance at Jun. 30, 2024	$ 1,365	$ 3	$ 1,714	$ (325)	$ (27)