Schedule IV - Schedule of Reinsurance Level 4 (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Life Insurance in Force, Net [Abstract]
Direct Premiums, Life Insurance in Force	$ 284,779	$ 306,472	$ 327,772
Ceded Premiums Earned	213,221	234,306	255,185
Assumed Premiums, Life Insurance in Force	558	713	797
Premiums, Net, Life Insurance in Force	$ 72,116	$ 72,879	$ 73,384
Life Insurance in Force Premiums, Percentage Assumed to Net	1.00%	1.00%	1.00%
Insurance Services Revenue [Abstract]
Direct Premiums Earned	$ 2,659	$ 2,877	$ 3,228
Ceded Premiums Earned	1,616	1,801	2,060
Assumed Premiums Earned	129	113	74
Premiums Earned, Net, Life	1,172	1,189	1,242
Premiums Earned, Net	$ 203	$ 92	$ 32
Premiums, Percentage Assumed to Net	11.00%	10.00%	6.00%
Accident and Health Insurance Product Line [Member]
Insurance Services Revenue [Abstract]
Direct Premiums Earned	$ 135	$ 190	$ 249
Ceded Premiums Earned	89	128	369
Assumed Premiums Earned	0	0	0
Premiums Earned, Net	$ 46	$ 62	$ 120
Premiums, Percentage Assumed to Net	0.00%	0.00%	0.00%
Life and Annuity Insurance Product Line [Member]
Insurance Services Revenue [Abstract]
Direct Premiums Earned	$ 2,524	$ 2,687	$ 2,979
Ceded Premiums Earned	1,527	1,673	1,691
Assumed Premiums Earned	129	113	74
Premiums Earned, Net	$ 1,126	$ 1,127	$ 1,362
Premiums, Percentage Assumed to Net	11.00%	10.00%	5.00%

Amount of earned premiums assumed from other entities.

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