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Schedule IV Reinsurance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Life insurance in-force
Gross Amount	$ 722,048	$ 700,860	$ 657,197
Ceded Amount	16,674	9,493	7,919
Assumed From Other Companies	442,817	301,573	22,239
Net Amount	$ 1,148,191	$ 992,940	$ 671,517
Percentage of Amount Assumed to Net	39.00%	30.00%	3.00%
Insurance revenues
Gross Amount	$ 14,439	$ 14,204	$ 14,031
Ceded Amount	660	650	627
Assumed From Other Companies	2,265	678	368
Net Amount	$ 16,044	$ 14,232	$ 13,772
Percentage of Amount Assumed to Net	14.00%	5.00%	3.00%
Property and Casualty Insurance Products
Insurance revenues
Gross Amount	$ 10,824	$ 10,923	$ 10,871
Ceded Amount	599	600	583
Assumed From Other Companies	221	232	261
Net Amount	$ 10,446	$ 10,555	$ 10,549
Percentage of Amount Assumed to Net	2.00%	2.00%	2.00%
Life insurance and annuities
Insurance revenues
Gross Amount	$ 1,551	$ 1,526	$ 1,471
Ceded Amount	22	14	11
Assumed From Other Companies	1,082	232	52
Net Amount	$ 2,611	$ 1,744	$ 1,512
Percentage of Amount Assumed to Net	41.00%	13.00%	3.00%
Accident and health insurance
Insurance revenues
Gross Amount	$ 2,064	$ 1,755	$ 1,689
Ceded Amount	39	36	33
Assumed From Other Companies	962	214	55
Net Amount	$ 2,987	$ 1,933	$ 1,711
Percentage of Amount Assumed to Net	32.00%	11.00%	3.00%

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Amount of life insurance issued and outstanding assumed from other entity, as disclosed in supplementary reinsurance information. Includes, but is not limited to, dividend and adjustment to face value.

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