Fair Value of Financial Instruments (Carrying and Estimated Fair Values of Financial Instruments) (Details) - USD ($) $ in Millions		Sep. 30, 2015	Dec. 31, 2014
AFS securities:
AFS Fixed Maturity Securities		$ 85,506	$ 86,240
AFS Equity securities		242	231
Trading securities		1,914	2,065
Mortgage loans on real estate		8,431	7,574
Derivative investments		2,020	1,860
Other investments		1,820	1,709
Carrying Value [Member]
AFS securities:
AFS Equity securities		242	231
Trading securities		1,914	2,065
Mortgage loans on real estate		8,431	7,574
Derivative investments	[1]	2,020	1,860
Other investments		1,820	1,709
Cash and invested cash		3,772	3,919
Other assets - reinsurance recoverable		294	154
Separate account assets		120,275	125,265
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives		(1,043)	(1,170)
Other contract holder funds:
Remaining guaranteed interest and similar contracts		(697)	(699)
Account values of certain investment contracts		(30,214)	(29,156)
Short-term debt			(250)
Long-term debt		(5,604)	(5,270)
Reinsurance related embedded derivatives		(116)	(150)
VIEs' liabilities - derivative instruments		(2)	(13)
Other liabilities - credit default swaps		(7)	(3)
Other liabilities - derivative liabilities	[1]	(74)	(77)
Other liabilities - GLB reserves embedded derivatives	[2]	(1,287)	(174)
Fair Value [Member]
AFS securities:
AFS Equity securities		242	231
Trading securities		1,914	2,065
Mortgage loans on real estate		8,857	8,038
Derivative investments	[1]	2,020	1,860
Other investments		1,820	1,709
Cash and invested cash		3,772	3,919
Other assets - reinsurance recoverable		294	154
Separate account assets		120,275	125,265
Future contract benefits:
Indexed annuity and IUL contracts embedded derivatives		(1,043)	(1,170)
Other contract holder funds:
Remaining guaranteed interest and similar contracts		(697)	(699)
Account values of certain investment contracts		(34,226)	(33,079)
Short-term debt			(253)
Long-term debt		(5,647)	(5,707)
Reinsurance related embedded derivatives		(116)	(150)
VIEs' liabilities - derivative instruments		(2)	(13)
Other liabilities - credit default swaps		(7)	(3)
Other liabilities - derivative liabilities	[1]	(74)	(77)
Other liabilities - GLB reserves embedded derivatives	[2]	(1,287)	(174)
VIEs' Fixed Maturity Securities [Member] | Carrying Value [Member]
AFS securities:
AFS Fixed Maturity Securities		598	598
VIEs' Fixed Maturity Securities [Member] | Fair Value [Member]
AFS securities:
AFS Fixed Maturity Securities		598	598
Fixed Maturity AFS Securities [Member] | Carrying Value [Member]
AFS securities:
AFS Fixed Maturity Securities		85,506	86,240
Fixed Maturity AFS Securities [Member] | Fair Value [Member]
AFS securities:
AFS Fixed Maturity Securities		$ 85,506	$ 86,240

[1] We have master netting agreements with each of our derivative counterparties, which allow for the netting of our derivative asset and liability positions by counterparty.

[2] Portions of our GLB reserves embedded derivatives are ceded to third-party reinsurance counterparties. Refer to Note 5 for additional detail.