Fair Value of Financial Instruments (Fair Value Measured On A Recurring Basis Reconciliation) (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2017	Mar. 31, 2016
Level 3 Unobservable Input Reconciliation
Beginning Fair Value		$ 1,545	$ 1,799
Items Included in Net Income		328	(1,221)
Gains (Losses) in OCI and Other	[1]	97	110
Issuances, Sales, Maturities, Settlements, Calls, Net		107	56
Transfers In or Out of Level 3, Net	[2]	147	139
Ending Fair Value		2,224	883
Corporate bonds [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	2,405	1,993
Items Included in Net Income	[3]	6	6
Gains (Losses) in OCI and Other	[1],[3]	65	18
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	(204)	28
Transfers In or Out of Level 3, Net	[2],[3]	131	140
Ending Fair Value	[3]	2,403	2,185
ABS [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	33	45
Items Included in Net Income	[3]
Gains (Losses) in OCI and Other	[1],[3]	1	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]
Transfers In or Out of Level 3, Net	[2],[3]	(5)
Ending Fair Value	[3]	29	44
U.S. government bonds [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Transfers In or Out of Level 3, Net	[2],[3]	5
Ending Fair Value	[3]	5
Foreign government bonds [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	111	111
Items Included in Net Income	[3]
Gains (Losses) in OCI and Other	[1],[3]	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]
Transfers In or Out of Level 3, Net	[2],[3]
Ending Fair Value	[3]	110	111
RMBS [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	3	1
Items Included in Net Income	[3]
Gains (Losses) in OCI and Other	[1],[3]
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	4
Transfers In or Out of Level 3, Net	[2],[3]
Ending Fair Value	[3]	7	1
CMBS [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	7	10
Items Included in Net Income	[3]
Gains (Losses) in OCI and Other	[1],[3]
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	41	(1)
Transfers In or Out of Level 3, Net	[2],[3]	(4)
Ending Fair Value	[3]	44	9
CLOs [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	68	551
Items Included in Net Income	[3]
Gains (Losses) in OCI and Other	[1],[3]		2
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	5	38
Transfers In or Out of Level 3, Net	[2],[3]	15
Ending Fair Value	[3]	88	591
State and municipal bonds [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	[3]	(1)
Transfers In or Out of Level 3, Net	[2],[3]	2
Ending Fair Value	[3]	1
Hybrid and redeemable preferred securities [Member] | Fixed maturity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	76	94
Items Included in Net Income	[3]
Gains (Losses) in OCI and Other	[1],[3]	3	(2)
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]
Transfers In or Out of Level 3, Net	[2],[3]
Ending Fair Value	[3]	79	92
Equity AFS securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	177	164
Items Included in Net Income	[3]	1
Gains (Losses) in OCI and Other	[1],[3]	(1)	(1)
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	5	4
Transfers In or Out of Level 3, Net	[2],[3]
Ending Fair Value	[3]	182	167
Trading securities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	65	73
Items Included in Net Income	[3]	1	1
Gains (Losses) in OCI and Other	[1],[3]	7	2
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	(16)	(1)
Transfers In or Out of Level 3, Net	[2],[3]	3	(1)
Ending Fair Value	[3]	60	74
Derivative investments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[3]	(93)	555
Items Included in Net Income	[3]	(69)	(440)
Gains (Losses) in OCI and Other	[1],[3]	23	92
Issuances, Sales, Maturities, Settlements, Calls, Net	[3]	251	(17)
Transfers In or Out of Level 3, Net	[2],[3]
Ending Fair Value	[3]	112	190
Other investments [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	[4]		2
Ending Fair Value	[4]		2
GLB ceded embedded derivatives [Member] | Other assets [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	203	268
Items Included in Net Income	[5]	(87)	165
Ending Fair Value	[5]	116	433
Indexed annuity and IUL contracts embedded derivatives [Member] | Future contract benefits [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	(1,139)	(1,100)
Items Included in Net Income	[5]	(120)	7
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]	21	5
Transfers In or Out of Level 3, Net	[2],[5]
Ending Fair Value	[5]	(1,238)	(1,088)
VIEs' liabilities - derivative instruments [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]		(4)
Items Included in Net Income	[4]		4
Credit default swaps [Member] | Other liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[4]		(9)
Items Included in Net Income	[4]		(3)
Gains (Losses) in OCI and Other	[1],[4]
Issuances, Sales, Maturities, Settlements, Calls, Net	[4]
Transfers In or Out of Level 3, Net	[2],[4]
Ending Fair Value	[4]		(12)
GLB direct embedded derivatives [Member] | Other assets [Member]
Level 3 Unobservable Input Reconciliation
Items Included in Net Income	[5]	226
Ending Fair Value	[5]	226
GLB direct embedded derivatives [Member] | Other liabilities [Member]
Level 3 Unobservable Input Reconciliation
Beginning Fair Value	[5]	(371)	(953)
Items Included in Net Income	[5]	371	(963)
Gains (Losses) in OCI and Other	[1],[5]
Issuances, Sales, Maturities, Settlements, Calls, Net	[5]
Transfers In or Out of Level 3, Net	[2],[5]
Ending Fair Value	[5]		$ (1,916)

[1] The changes in fair value of the interest rate swaps are offset by an adjustment to derivative investments (see Note 5).

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

[3] 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).

[4] The changes in fair value of the credit default swaps and contingency forwards are included in realized gain (loss) on our Consolidated Statements of Comprehensive Income (Loss).

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