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Schedule IV Reinsurance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Life insurance in-force
Gross Amount	$ 1,134,390	$ 879,496	$ 722,048
Ceded Amount	19,055	18,483	16,674
Assumed From Other Companies	20,373	254,739	442,817
Net Amount	$ 1,135,708	$ 1,115,752	$ 1,148,191
Percentage of Amount Assumed to Net	2.00%	23.00%	39.00%
Insurance revenues
Gross Amount	$ 17,796	$ 16,132	$ 14,439
Ceded Amount	1,269	1,027	660
Assumed From Other Companies	927	1,988	2,265
Premiums Earned, Net	$ 17,288	$ 16,923	$ 15,869
Percentage of Amount Assumed to Net	5.00%	12.00%	14.00%
Earned premiums and fees [Member]
Insurance revenues
Premiums Earned, Net	$ 17,454	$ 17,093	$ 16,044
Property and Casualty Insurance Products
Insurance revenues
Gross Amount	12,551	12,010	10,824
Ceded Amount	1,173	936	599
Assumed From Other Companies	540	416	221
Premiums Earned, Net	$ 11,918	$ 11,490	$ 10,446
Percentage of Amount Assumed to Net	5.00%	4.00%	2.00%
Life insurance and annuities
Insurance revenues
Gross Amount	$ 2,251	$ 1,739	$ 1,551
Ceded Amount	24	25	22
Assumed From Other Companies	207	807	1,082
Premiums Earned, Net	$ 2,434	$ 2,521	$ 2,611
Percentage of Amount Assumed to Net	9.00%	32.00%	41.00%
Accident and health insurance
Insurance revenues
Gross Amount	$ 2,994	$ 2,383	$ 2,064
Ceded Amount	72	66	39
Assumed From Other Companies	180	765	962
Premiums Earned, Net	$ 3,102	$ 3,082	$ 2,987
Percentage of Amount Assumed to Net	6.00%	25.00%	32.00%

X

- Definition

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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