SCHEDULE III - CONDENSED SUPPLEMENTARY INSURANCE INFORMATION (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Supplementary Insurance Information, by Segment [Line Items]
DAC and VOBA		$ 9,134	$ 9,510	$ 8,207
Future Contract Benefits		21,576	20,708	20,057
Unearned Premiums	[1]
Other Contract Holder Funds		78,903	77,362	75,512
Insurance Premiums		2,987	3,246	2,988
Net Investment Income		4,874	4,827	4,859
Benefits and Interest Credited		7,256	7,552	7,211
Amortization of DAC and VOBA		1,276	1,271	1,114
Other Operating Expenses		3,403	3,319	3,232
Premiums Written
Annuities Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
DAC and VOBA		3,597	3,558	3,062
Future Contract Benefits		2,485	2,095	1,569
Unearned Premiums	[1]
Other Contract Holder Funds		21,202	21,162	21,070
Insurance Premiums		331	418	173
Net Investment Income		1,033	1,004	1,034
Benefits and Interest Credited		1,130	1,259	959
Amortization of DAC and VOBA		388	330	365
Other Operating Expenses		1,296	1,317	1,252
Premiums Written
Retirement Plan Services Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
DAC and VOBA		201	216	148
Future Contract Benefits		4	4	2
Unearned Premiums	[1]
Other Contract Holder Funds		17,878	16,583	16,223
Net Investment Income		859	846	830
Benefits and Interest Credited		515	497	474
Amortization of DAC and VOBA		28	30	37
Other Operating Expenses		386	385	368
Premiums Written
Life Insurance Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
DAC and VOBA		5,145	5,496	4,749
Future Contract Benefits		11,400	10,595	10,347
Unearned Premiums	[1]
Other Contract Holder Funds		39,332	38,706	37,280
Insurance Premiums		703	649	558
Net Investment Income		2,562	2,541	2,530
Benefits and Interest Credited		4,071	3,938	3,783
Amortization of DAC and VOBA		734	831	655
Other Operating Expenses		688	650	658
Premiums Written
Group Protection Segment [Member]
Supplementary Insurance Information, by Segment [Line Items]
DAC and VOBA		191	240	248
Future Contract Benefits		2,280	2,347	2,249
Unearned Premiums	[1]
Other Contract Holder Funds		168	170	183
Insurance Premiums		1,939	2,163	2,252
Net Investment Income		176	184	180
Benefits and Interest Credited		1,324	1,638	1,778
Amortization of DAC and VOBA		126	80	57
Other Operating Expenses		580	573	574
Premiums Written
Other Operations [Member]
Supplementary Insurance Information, by Segment [Line Items]
Future Contract Benefits		5,407	5,667	5,890
Unearned Premiums	[1]
Other Contract Holder Funds		323	741	756
Insurance Premiums		14	16	5
Net Investment Income		244	252	285
Benefits and Interest Credited		216	220	217
Other Operating Expenses		453	394	380
Premiums Written

[1] Unearned premiums are included in Column C, future contract benefits.