Derivatives and Hedging Activities (Details 3) (Derivatives not designated as hedging instruments, USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	$ (99)	$ (52)	$ (144)	$ (225)
GMWB and GMAB
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	(103)	(52)	(155)	(226)
Gross notional amount of derivative contracts	153,500		153,500		142,100
GMWB and GMAB | Interest rate contracts
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	(380)	328	(512)	103
GMWB and GMAB | Equity derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	12	188	(480)	(507)
GMWB and GMAB | Credit contracts
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	8	1	8	(2)
GMWB and GMAB | Foreign currency contracts
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	2	(3)	7	1
GMWB and GMAB | Embedded derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	255	(566)	822	179
EIA
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Gross notional amount of derivative contracts	13		13		10
EIA | Equity derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income			1	1
EIA embedded derivatives | Equity derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income			(1)
IUL
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Gross notional amount of derivative contracts	327		327		200
IUL | Equity derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	2		6
IUL embedded derivatives | Equity derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	2		5
Other derivatives
Impact of derivatives not designated as hedging instruments on the Consolidated Statements of Income
Amount of Gain (Loss) on Derivatives Recognized in Income	$ 4		$ 11	$ 1