Variable Annuity and Insurance Guarantees (VA Guarantee Details Table) (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014		Dec. 31, 2013
GMDB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	$ 75,862	[1]	$ 74,308	[1]
Contract value in separate accounts	71,050	[1]	69,435	[1]
Net amount at risk	131	[1]	145	[1]
Weighted average attained age	64 years	[1]	64 years	[1]
GMDB [Member] | Return of premium [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	55,378	[1]	52,616	[1]
Contract value in separate accounts	53,565	[1]	50,790	[1]
Net amount at risk	24	[1]	28	[1]
Weighted average attained age	64 years	[1]	64 years	[1]
GMDB [Member] | Five/six-year reset [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	10,360	[1]	11,220	[1]
Contract value in separate accounts	7,821	[1]	8,663	[1]
Net amount at risk	28	[1]	42	[1]
Weighted average attained age	64 years	[1]	64 years	[1]
GMDB [Member] | One-year ratchet [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	7,392	[1]	7,676	[1]
Contract value in separate accounts	7,006	[1]	7,261	[1]
Net amount at risk	39	[1]	38	[1]
Weighted average attained age	66 years	[1]	65 years	[1]
GMDB [Member] | Five-year ratchet [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	1,773	[1]	1,781	[1]
Contract value in separate accounts	1,717	[1]	1,725	[1]
Net amount at risk	2	[1]	1	[1]
Weighted average attained age	63 years	[1]	62 years	[1]
GMDB [Member] | Other [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	959	[1]	1,015	[1]
Contract value in separate accounts	941	[1]	996	[1]
Net amount at risk	38	[1]	36	[1]
Weighted average attained age	70 years	[1]	69 years	[1]
GGU death benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	1,072	[1]	1,052	[1]
Contract value in separate accounts	1,019	[1]	998	[1]
Net amount at risk	123	[1]	121	[1]
Weighted average attained age	67 years	[1]	64 years	[1]
GMIB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	343	[1]	413	[1]
Contract value in separate accounts	321	[1]	389	[1]
Net amount at risk	9	[1]	8	[1]
Weighted average attained age	67 years	[1]	66 years	[1]
GMWB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	40,514	[1]	38,005	[1]
Contract value in separate accounts	40,394	[1]	37,851	[1]
Net amount at risk	96	[1]	78	[1]
Weighted average attained age	65 years	[1]	64 years	[1]
GMWB [Member] | GMWB standard benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	3,671	[1]	3,936	[1]
Contract value in separate accounts	3,659	[1]	3,921	[1]
Net amount at risk	1	[1]	1	[1]
Weighted average attained age	68 years	[1]	67 years	[1]
GMWB [Member] | GMWB for life [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	36,843	[1]	34,069	[1]
Contract value in separate accounts	36,735	[1]	33,930	[1]
Net amount at risk	95	[1]	77	[1]
Weighted average attained age	65 years	[1]	64 years	[1]
GMAB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	4,247	[1]	4,194	[1]
Contract value in separate accounts	4,234	[1]	4,181	[1]
Net amount at risk	$ 2	[1]	$ 2	[1]
Weighted average attained age	58 years	[1]	58 years	[1]

[1] Individual variable annuity contracts may have more than one guarantee and therefore may be included in more than one benefit type. Variable annuity contracts for which the death benefit equals the account value are not shown in this table