Derivatives and Hedging Activities (Income Statement) (Details 2) (Derivatives not designated as hedging instruments [Member], USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015		Mar. 31, 2014
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	$ (104)		$ (42)
GMWB and GMAB [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(99)		(55)
Total other [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(5)		13
Benefits, claims, losses and settlement expenses [Member] | GMWB and GMAB [Member] | Interest rate contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	386		264
Benefits, claims, losses and settlement expenses [Member] | GMWB and GMAB [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(122)		(204)
Benefits, claims, losses and settlement expenses [Member] | GMWB and GMAB [Member] | Credit contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(9)		(10)
Benefits, claims, losses and settlement expenses [Member] | GMWB and GMAB [Member] | Foreign currency [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(6)		(1)
Benefits, claims, losses and settlement expenses [Member] | GMWB and GMAB [Member] | GMWB and GMAB embedded derivatives [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(348)	[1]	(104)	[1]
Benefits, claims, losses and settlement expenses [Member] | Macro hedge program [Member] | Other contract [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(1)		13
Net investment income [Member] | Tax hedge [Member] | Interest rate contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income			3
Net investment income [Member] | Seed money [Member] | Interest rate contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income			(1)
Net investment income [Member] | Seed money [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(2)		(1)
Net investment income [Member] | Seed money [Member] | Commodity
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income			(1)
Interest credited to fixed accounts [Member] | IUL [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	1		5
Interest credited to fixed accounts [Member] | IUL embedded derivatives [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(9)		(6)
Banking and deposit interest expense [Member] | Stock market certificates [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	1		1
Banking and deposit interest expense [Member] | Stock market certificates embedded derivatives [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income			(1)
Distribution expenses [Member] | Deferred compensation [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	7		1
Distribution expenses [Member] | Deferred compensation [Member] | Foreign currency [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	(3)
General and administrative expense [Member] | Deferred compensation [Member] | Equity contracts [Member]
Impact of derivatives not designated as hedging instruments on Consolidated Statements of Income
Amount of gain (loss) on derivatives recognized in income	$ 1

[1] The fair values of GMWB and GMAB embedded derivatives fluctuate based on changes in equity, interest rate and credit markets.