UNAUDITED INTERIM STATEMENTS OF EQUITY - USD ($) $ in Millions	Total	Common   Stock	Additional   Paid-in Capital	Retained Earnings/(Accumulated Deficit)	Accumulated Other Comprehensive   Income (Loss)
Beginning Balance at Dec. 31, 2020	$ 2,701	$ 3	$ 4,383	$ (3,217)	$ 1,533
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent	(192)			(192)
Comprehensive income (loss):
Net income (loss)	1,890			1,890
Other comprehensive income (loss), net of taxes	(1,413)				(1,413)
Total comprehensive loss	477
Ending Balance at Mar. 31, 2021	2,986	3	4,383	(1,520)	120
Beginning Balance at Dec. 31, 2020	2,701	3	4,383	(3,217)	1,533
Comprehensive income (loss):
Net income (loss)	1,815
Other comprehensive income (loss), net of taxes	(1,179)
Ending Balance at Jun. 30, 2021	2,958	3	4,383	(1,782)	354
Beginning Balance at Mar. 31, 2021	2,986	3	4,383	(1,520)	120
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Dividend to parent	(188)			(188)
Comprehensive income (loss):
Net income (loss)	(75)			(75)
Other comprehensive income (loss), net of taxes	234				234
Total comprehensive loss	160
Ending Balance at Jun. 30, 2021	2,958	3	4,383	(1,782)	354
Beginning Balance at Dec. 31, 2021	1,682	3	592	917	170
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Return of capital	(306)		(306)
Comprehensive income (loss):
Net income (loss)	356			356
Other comprehensive income (loss), net of taxes	(443)				(443)
Total comprehensive loss	(87)
Ending Balance at Mar. 31, 2022	1,289	3	286	1,273	(273)
Comprehensive income (loss):
Net income (loss)	(180)
Other comprehensive income (loss), net of taxes	194
Ending Balance at Jun. 30, 2022	1,780	3	1,763	(180)	194
Beginning Balance at Apr. 01, 2022	1,766	3	1,763	0	0
Comprehensive income (loss):
Net income (loss)	(180)			(180)
Other comprehensive income (loss), net of taxes	194				194
Total comprehensive loss	14
Ending Balance at Jun. 30, 2022	$ 1,780	$ 3	$ 1,763	$ (180)	$ 194