SCHEDULE IV - CONSOLIDATED REINSURANCE (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Consolidated reinsurance, net [Abstract]
Premiums Earned, Net, Total		$ 2,987	$ 3,246	$ 2,988
Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount		9,551	9,529	9,064
Ceded to Other Companies		1,413	1,311	1,410
Assumed from Other Companies		93	73	7
Premiums Earned, Net, Total		8,231	8,291	7,661
Gross Amount, Life Insurance in Force	[1]	1,035,600	1,032,900	1,034,800
Ceded to Other Companies, Life Insurance in Force	[1]	288,000	287,400	292,800
Assumed from Other Companies, Life Insurance in Force	[1]	10,200	10,400	1,500
Premiums, Net, Life Insurance in Force, Total	[1]	$ 757,800	$ 755,900	$ 743,500
Percentage of Amount Assumed to Net, Life Insurance in Force	[1]	1.30%	1.40%	0.20%
Life insurance and annuities [Member] | Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount	[2]	$ 8,277	$ 8,112	$ 7,579
Ceded to Other Companies	[2]	1,392	1,289	1,381
Assumed from Other Companies	[2]	80	58	7
Premiums Earned, Net, Total	[2]	$ 6,965	$ 6,881	$ 6,205
Percentage of Amount Assumed to Net	[2]	1.10%	0.80%	0.10%
Accident and health insurance [Member] | Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount		$ 1,274	$ 1,417	$ 1,485
Ceded to Other Companies		21	22	29
Assumed from Other Companies		13	15
Premiums Earned, Net, Total		$ 1,266	$ 1,410	$ 1,456
Percentage of Amount Assumed to Net		1.00%	1.10%	0.00%

[1] Includes Group Protection segment and Other Operations in-force amounts.

[2] Includes insurance fees on universal life and other interest-sensitive products.