SCHEDULE IV - CONSOLIDATED REINSURANCE (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Consolidated reinsurance, net [Abstract]
Premiums Earned, Net, Total		$ 3,246	$ 2,988	$ 2,687
Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount		9,529	9,064	8,023
Ceded to Other Companies		1,311	1,410	1,275
Assumed from Other Companies		73	7	8
Premiums Earned, Net, Total		8,291	7,661	6,756
Gross Amount, Life Insurance in Force	[1]	1,032,900	1,034,800	990,600
Ceded to Other Companies, Life Insurance in Force	[1]	287,400	292,800	313,200
Assumed from Other Companies, Life Insurance in Force	[1]	10,400	1,500	1,700
Premiums, Net, Life Insurance in Force, Total	[1]	$ 755,900	$ 743,500	$ 679,100
Percentage of Amount Assumed to Net, Life Insurance in Force	[1]	1.40%	0.20%	0.30%
Life insurance and annuities [Member] | Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount	[2]	$ 8,112	$ 7,579	$ 6,644
Ceded to Other Companies	[2]	1,289	1,381	1,247
Assumed from Other Companies	[2]	58	7	8
Premiums Earned, Net, Total	[2]	$ 6,881	$ 6,205	$ 5,405
Percentage of Amount Assumed to Net	[2]	0.80%	0.10%	0.10%
Accident and health insurance [Member] | Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount		$ 1,417	$ 1,485	$ 1,379
Ceded to Other Companies		22	29	28
Assumed from Other Companies		15
Premiums Earned, Net, Total		$ 1,410	$ 1,456	$ 1,351
Percentage of Amount Assumed to Net		1.10%	0.00%	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.