SCHEDULE II - CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Statements Of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Cash Flows from Operating Activities
Net cash provided by (used in) operating activities	$ 151	$ 534	$ (2,686)
Cash Flows from Investing Activities
Net change in collateral on investments, derivatives and related settlements	3,261	1,474	79
Other	(303)	(153)	(261)
Net cash provided by (used in) investing activities	(3,567)	(9,481)	(5,499)
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities		(1,096)	(308)
Issuance of long-term debt, net of issuance costs		1,289	744
Payment related to modification or early extinguishment of debt	(8)	(13)	(42)
Repurchase of common stock	(1,105)	(275)	(550)
Dividends paid to common stockholders	(319)	(311)	(303)
Other	(60)	(6)
Net cash provided by (used in) financing activities	4,320	8,092	8,403
Net increase (decrease) in cash, invested cash and restricted cash	904	(855)	218
Cash, invested cash and restricted cash as of beginning-of-year	1,708	2,563	2,345
Cash, invested cash and restricted cash as of end-of-year	2,612	1,708	2,563
Parent Company [Member]
Cash Flows from Operating Activities
Net cash provided by (used in) operating activities	1,860	726	771
Cash Flows from Investing Activities
Capital contribution to subsidiaries	(65)	(518)	(50)
Net change in collateral on investments, derivatives and related settlements	168	(303)	(279)
Other	(40)
Net cash provided by (used in) investing activities	63	(821)	(329)
Cash Flows from Financing Activities
Payment of long-term debt, including current maturities		(1,096)	(308)
Issuance of long-term debt, net of issuance costs		1,289	744
Payment related to modification or early extinguishment of debt	(8)	(13)	(42)
Increase (decrease) in loans from subsidiaries, net	(188)	565	264
Increase (decrease) in loans to subsidiaries, net	(234)	(514)	(70)
Common stock issued for benefit plans	20	(7)	(20)
Repurchase of common stock	(1,105)	(275)	(550)
Dividends paid to common stockholders	(319)	(311)	(303)
Other		(6)
Net cash provided by (used in) financing activities	(1,834)	(368)	(285)
Net increase (decrease) in cash, invested cash and restricted cash	89	(463)	157
Cash, invested cash and restricted cash as of beginning-of-year	114	577	420
Cash, invested cash and restricted cash as of end-of-year	$ 203	$ 114	$ 577