Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions		3 Months Ended				9 Months Ended
		Sep. 30, 2019		Sep. 30, 2018		Sep. 30, 2019		Sep. 30, 2018
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 4,258		$ 3,476		$ 4,014		$ 3,139
Items Included in Net Income		(552)		58		(1,296)		541
Gains (Losses) in OCI and Other	[1]	73		(86)		290		(252)
Issuances, Sales, Maturities, Settlements, Calls, Net		393		567	[2]	1,603		889	[2]
Transfers Into or Out of Level 3, Net	[3]	(235)		(148)		(674)		(450)	[4]
Ending Fair Value		3,937		3,867		3,937		3,867
Corporate Bonds [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net								67
Corporate Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	3,648		3,181		3,269		3,091
Items Included in Net Income	[5]	3		1		3		7
Gains (Losses) in OCI and Other	[1],[5]	(49)		(30)		45		(137)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	256		88	[2]	627		319	[2]
Transfers Into or Out of Level 3, Net	[3],[5]	51		(31)		(35)		(71)	[4]
Ending Fair Value	[5]	3,909		3,209		3,909		3,209
ABS [Member] | Liberty Transaction [Member]
Level 3 Unobservable Input Reconciliation
Issuances, Sales, Maturities, Settlements, Calls, Net								17
ABS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	320		176		134		118
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]	1				2		(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	69		17	[2]	477		169	[2]
Transfers Into or Out of Level 3, Net	[3],[5]	(173)		(111)		(396)		(204)	[4]
Ending Fair Value	[5]	217		82		217		82
U.S. Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]							5
Issuances, Sales, Maturities, Settlements, Calls, Net	[2],[5]							(5)
Foreign Government Bonds [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	113		108		109		110
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]	2				6		(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]
Transfers Into or Out of Level 3, Net	[3],[5]
Ending Fair Value	[5]	115		108		115		108
RMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]					7		12
Items Included in Net Income
Gains (Losses) in OCI and Other	[1]
Issuances, Sales, Maturities, Settlements, Calls, Net		10		7	[2]	10	[5]	7	[2],[5]
Transfers Into or Out of Level 3, Net	[3]					(7)	[5]	(12)	[4],[5]
Ending Fair Value	[5]	10		7		10		7
CMBS [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	2		5		2		6
Items Included in Net Income	[5]							1
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	7		18	[2]	7		37	[2]
Transfers Into or Out of Level 3, Net	[3],[5]							(21)	[4]
Ending Fair Value	[5]	9		23		9		23
Hybrid And Redeemable Preferred Securities [Member] | Fixed Maturity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	78		78		75		76
Items Included in Net Income	[5]
Gains (Losses) in OCI and Other	[1],[5]			(1)		3		1
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]
Transfers Into or Out of Level 3, Net	[3],[5]
Ending Fair Value	[5]	78		77		78		77
Equity AFS Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]							162
Transfers Into or Out of Level 3, Net	[3],[4],[5]							(162)
Trading Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		523	[5]	22	[5]	67	[5]	49
Items Included in Net Income		10	[5]			12	[5]	(5)
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net		146	[5]	2	[2],[5]	723	[5]	(20)	[2]
Transfers Into or Out of Level 3, Net	[3]	(113)	[5]	(6)	[5]	(236)	[5]	(6)	[4]
Ending Fair Value	[5]	566		18		566		18
Equity Securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	68		26		25
Items Included in Net Income	[5]	(11)				(11)
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	(3)				40
Transfers Into or Out of Level 3, Net	[3]		[5]					26	[4]
Ending Fair Value	[5]	54		26		54		26
Derivative Investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		466	[5]	93	[5]	534	[5]	30
Items Included in Net Income		184	[5]	(115)	[5]	(128)	[5]	106
Gains (Losses) in OCI and Other	[1]	119	[5]	(55)	[5]	234	[5]	(113)
Issuances, Sales, Maturities, Settlements, Calls, Net		22	[5]	431	[2],[5]	151	[5]	331	[2]
Transfers Into or Out of Level 3, Net	[3],[5]
Ending Fair Value	[5]	791		354		791		354
GLB Direct Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]			1,248		123		903
Items Included in Net Income	[6]			400		(123)		745
Ending Fair Value	[6]			1,648				1,648
GLB Direct Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(1)
Items Included in Net Income	[6]	(845)				(846)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]
Transfers Into or Out of Level 3, Net	[3],[6]
Ending Fair Value	[6]	(846)				(846)
GLB Ceded Embedded Derivatives [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	111		41		72		51
Items Included in Net Income	[6]	130		(6)		169		(16)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]
Transfers Into or Out of Level 3, Net	[3],[6]
Ending Fair Value	[6]	241		35		241		35
GLB Ceded Embedded Derivatives [Member] | Other Liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]			(131)				(67)
Items Included in Net Income	[6]			(62)				(126)
Ending Fair Value	[6]			(193)				(193)
Indexed Annuity And IUL Contracts [Member] | Other Assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	903		29		902		11
Items Included in Net Income	[6]	7		4		128		4
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]	(19)		11	[2]	(139)		29	[2]
Transfers Into or Out of Level 3, Net	[3],[6]
Ending Fair Value	[6]	891		44		891		44
Indexed Annuity And IUL Contracts [Member] | Future Contract Benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[6]	(1,973)		(1,400)		(1,305)		(1,418)
Items Included in Net Income	[6]	(30)		(164)		(500)		(175)
Gains (Losses) in OCI and Other	[1],[6]
Issuances, Sales, Maturities, Settlements, Calls, Net	[6]	(95)		(7)	[2]	(293)		22	[2]
Transfers Into or Out of Level 3, Net	[3],[6]
Ending Fair Value	[6]	$ (2,098)		$ (1,571)		$ (2,098)		$ (1,571)

[1] The changes in fair value of the interest rate swaps are offset by an adjustment to derivative investments (see Note 6).⁽²⁾I

[2] Issuances, sales, maturities, settlements, calls, net, includes financial instruments acquired in the Liberty Life transaction as follows: corporate bonds of $67 million and asset-backed securities of $17 million.

[3] Transfers into or out of Level 3 for AFS and trading securities are reported at amortized cost as of the beginning-of-year. For AFS and trading securities, the difference between beginning-of-period amortized cost and beginning-of-period fair value was included in OCI and earnings, respectively, in the prior period.

[4] Transfers into or out of Level 3 for FHLB stock between equity securities and other investments are reported at cost on our Consolidated Balance Sheets.

[5] Amortization and accretion of premiums and discounts are included in net investment income on our Consolidated Statements of Comprehensive Income (Loss). Gains (losses) from sales, maturities, settlements and calls and OTTI are included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).

[6] Gains (losses) from sales, maturities, settlements and calls are included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).