SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT - Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities
Net Cash Provided by (Used in) Operating Activities	$ (2,074)	$ 3,609	$ (217)
Cash Flows from Investing Activities
Net change in collateral on investments, certain derivatives and related settlements	(260)	(4,070)	3,261
Other	(310)	(48)	(303)
Net cash provided by (used in) investing activities	(3,334)	(11,646)	(3,584)
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities	(500)	(300)	0
Issuance of long-term debt, net of issuance costs	0	296	0
Payment related to modification or early extinguishment of debt	0	0	(8)
Issuance of preferred stock, net of issuance costs	0	986	0
Repurchase of common stock	0	(550)	(1,105)
Dividends paid to preferred stockholders	(82)	0	0
Dividends paid to common stockholders	(305)	(310)	(319)
Net cash provided by (used in) financing activities	5,430	8,768	4,705
Net increase (decrease) in cash, invested cash and restricted cash	22	731	904
Cash, invested cash and restricted cash as of beginning-of-year	3,343	2,612	1,708
Cash, invested cash and restricted cash as of end-of-year	3,365	3,343	2,612
Parent Company
Cash Flows from Operating Activities
Net Cash Provided by (Used in) Operating Activities	398	608	1,860
Cash Flows from Investing Activities
Capital contribution to subsidiaries	(7)	(925)	(65)
Net change in collateral on investments, certain derivatives and related settlements	69	583	168
Other	45	(5)	(40)
Net cash provided by (used in) investing activities	107	(347)	63
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities	(500)	(300)	0
Issuance of long-term debt, net of issuance costs	0	296	0
Payment related to modification or early extinguishment of debt	0	0	(8)
Increase (decrease) in loans from subsidiaries, net	(84)	(563)	(188)
Increase (decrease) in loans to subsidiaries, net	(113)	708	(234)
Common stock issued for benefit plans	(7)	(16)	20
Issuance of preferred stock, net of issuance costs	0	986	0
Repurchase of common stock	0	(550)	(1,105)
Dividends paid to preferred stockholders	(82)	0	0
Dividends paid to common stockholders	(305)	(310)	(319)
Net cash provided by (used in) financing activities	(1,091)	251	(1,834)
Net increase (decrease) in cash, invested cash and restricted cash	(586)	512	89
Cash, invested cash and restricted cash as of beginning-of-year	715	203	114
Cash, invested cash and restricted cash as of end-of-year	$ 129	$ 715	$ 203