Condensed Consolidated Statements of Changes in Shareholder's Equity - USD ($) $ in Millions	Total	Common Stock	Additional Paid-In Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings (Deficit)
Beginning Balance at Dec. 31, 2021	$ 5,080	$ 3	$ 3,191	$ 1,562	$ 324
Comprehensive income (loss):
Net income (loss)	158	0	0	0	158
Ending Balance at Sep. 30, 2022	565	3	2,778	(2,254)	38
Comprehensive income (loss):
Dividends	857	0	413	0	444
Other comprehensive income (loss), after tax	(3,816)	0	0	(3,816)	0
Comprehensive income (loss)	(3,658)
Beginning Balance at Jun. 30, 2022	1,447	3	2,778	(1,298)	(36)
Comprehensive income (loss):
Net income (loss)	74	0	0	0	74
Ending Balance at Sep. 30, 2022	565	3	2,778	(2,254)	38
Comprehensive income (loss):
Other comprehensive income (loss), after tax	(956)	0	0	(956)	0
Comprehensive income (loss)	(882)
Beginning Balance at Dec. 31, 2022	927	3	2,778	(2,067)	213
Comprehensive income (loss):
Net income (loss)	260	0	0	0	260
Ending Balance at Sep. 30, 2023	537	3	2,770	(2,407)	171
Comprehensive income (loss):
Dividends	310	0	8	0	302
Other comprehensive income (loss), after tax	(340)	0	0	(340)
Comprehensive income (loss)	(80)
Beginning Balance at Jun. 30, 2023	1,005	3	2,770	(1,869)	101
Comprehensive income (loss):
Net income (loss)	70	0	0	0	70
Ending Balance at Sep. 30, 2023	537	3	2,770	(2,407)	171
Comprehensive income (loss):
Other comprehensive income (loss), after tax	(538)	$ 0	$ 0	$ (538)	$ 0
Comprehensive income (loss)	$ (468)