Variable Annuity and Insurance Guarantees (VA GuaranteesDetail Text) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		12 Months Ended
	Mar. 31, 2015		Dec. 31, 2014
GMDB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	$ 76,822	[1]	$ 75,862	[1]
Contract value in separate accounts	72,021	[1]	71,050	[1]
Net amount at risk	114	[1]	131	[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	56,429	[1]	55,378	[1]
Contract value in separate accounts	54,623	[1]	53,565	[1]
Net amount at risk	20	[1]	24	[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	10,269	[1]	10,360	[1]
Contract value in separate accounts	7,728	[1]	7,821	[1]
Net amount at risk	25	[1]	28	[1]
Weighted average attained age	65 years	[1]	64 years	[1]
GMDB [Member] | One-year ratchet [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	7,395	[1]	7,392	[1]
Contract value in separate accounts	7,016	[1]	7,006	[1]
Net amount at risk	30	[1]	39	[1]
Weighted average attained age	66 years	[1]	66 years	[1]
GMDB [Member] | Five-year ratchet [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	1,774	[1]	1,773	[1]
Contract value in separate accounts	1,717	[1]	1,717	[1]
Net amount at risk	1	[1]	2	[1]
Weighted average attained age	63 years	[1]	63 years	[1]
GMDB [Member] | Other [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	955	[1]	959	[1]
Contract value in separate accounts	937	[1]	941	[1]
Net amount at risk	38	[1]	38	[1]
Weighted average attained age	70 years	[1]	70 years	[1]
GGU death benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	1,104	[1]	1,072	[1]
Contract value in separate accounts	1,052	[1]	1,019	[1]
Net amount at risk	126	[1]	123	[1]
Weighted average attained age	67 years	[1]	67 years	[1]
GMIB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	331	[1]	343	[1]
Contract value in separate accounts	310	[1]	321	[1]
Net amount at risk	9	[1]	9	[1]
Weighted average attained age	67 years	[1]	67 years	[1]
GMWB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	41,352	[1]	40,514	[1]
Contract value in separate accounts	41,236	[1]	40,394	[1]
Net amount at risk	94	[1]	96	[1]
Weighted average attained age	65 years	[1]	65 years	[1]
GMWB [Member] | GMWB standard benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	3,641	[1]	3,671	[1]
Contract value in separate accounts	3,629	[1]	3,659	[1]
Net amount at risk	1	[1]	1	[1]
Weighted average attained age	68 years	[1]	68 years	[1]
GMWB [Member] | Guaranteed Lifetime Withdrawal Benefit [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	37,711	[1]	36,843	[1]
Contract value in separate accounts	37,607	[1]	36,735	[1]
Net amount at risk	93	[1]	95	[1]
Weighted average attained age	65 years	[1]	65 years	[1]
GMAB [Member]
Variable Annuity Guarantees by Benefit Type
Total contract value	4,307	[1]	4,247	[1]
Contract value in separate accounts	4,293	[1]	4,234	[1]
Net amount at risk	$ 1	[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.