Schedule IV Reinsurance Level 4 (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Life Insurance in Force, Net [Abstract]
Life Insurance in Force, Gross	$ 619,722	$ 875,229	$ 883,387
Ceded Premiums, Life Insurance in Force	4,880	240,285	278,059
Assumed Premiums, Life Insurance in Force	21,406	21,987	49,789
Premiums, Net, Life Insurance in Force	$ 636,248	$ 656,931	$ 655,117
Life Insurance in Force Premiums, Percentage Assumed to Net	3.00%	3.00%	8.00%
Insurance Services Revenue [Abstract]
Direct Premiums Earned	$ 16,471	$ 16,560	$ 16,929
Ceded Premiums Earned	2,293	2,419	2,651
Assumed From Other Companies	507	457	379
Premiums Earned, Net, Life	$ 14,685	$ 14,598	$ 14,657
Percentage of Amount Assumed to Net	3.00%	3.00%	3.00%
Property, Liability and Casualty Insurance Product Line [Member]
Insurance Services Revenue [Abstract]
Direct Premiums Earned	$ 10,704	$ 10,531	$ 10,494
Ceded Premiums Earned	586	699	871
Assumed From Other Companies	298	264	241
Premiums Earned, Net, Property and Casualty	$ 10,416	$ 10,096	$ 9,864
Percentage of Amount Assumed to Net	3.00%	3.00%	2.00%
Life and Annuity Insurance Product Line [Member]
Insurance Services Revenue [Abstract]
Gross Fee Income Earned Premium and Other Life	$ 4,099	$ 4,414	$ 4,819
Ceded Premiums Earned	1,650	1,666	1,718
Assumed From Other Companies	161	137	80
Premiums Earned, Net, Life	$ 2,610	$ 2,885	$ 3,181
Percentage of Amount Assumed to Net	6.00%	5.00%	3.00%
Accident and Health Insurance Product Line [Member]
Insurance Services Revenue [Abstract]
Gross Fee Income Earned Premium and Other Life	$ 1,668	$ 1,615	$ 1,616
Ceded Premiums Earned	57	54	62
Assumed From Other Companies	48	56	58
Premiums Earned, Net, Life	$ 1,659	$ 1,617	$ 1,612
Percentage of Amount Assumed to Net	3.00%	3.00%	4.00%