Schedule IV Reinsurance (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Life insurance in-force
Gross Amount	$ 1,112,333	$ 1,134,390	$ 879,496
Ceded Amount	22,814	19,055	18,483
Assumed From Other Companies	21,230	20,373	254,739
Net Amount	$ 1,110,749	$ 1,135,708	$ 1,115,752
Percentage of Amount Assumed to Net	2.00%	2.00%	23.00%
Insurance revenues
Gross Amount	$ 18,867	$ 17,796	$ 16,132
Ceded Amount	1,381	1,269	1,027
Assumed From Other Companies	696	927	1,988
Premiums Earned, Net	$ 17,999	$ 17,288	$ 16,923
Percentage of Amount Assumed to Net	4.00%	5.00%	12.00%
Earned premiums and fees [Member]
Insurance revenues
Premiums Earned, Net	$ 18,182	$ 17,454	$ 17,093
Property and Casualty Insurance Products
Insurance revenues
Gross Amount	13,204	12,551	12,010
Ceded Amount	1,277	1,173	936
Assumed From Other Companies	568	540	416
Premiums Earned, Net	$ 12,495	$ 11,918	$ 11,490
Percentage of Amount Assumed to Net	5.00%	5.00%	4.00%
Life insurance and annuities
Insurance revenues
Gross Amount	$ 2,367	$ 2,251	$ 1,739
Ceded Amount	25	24	25
Assumed From Other Companies	46	207	807
Premiums Earned, Net	$ 2,388	$ 2,434	$ 2,521
Percentage of Amount Assumed to Net	2.00%	9.00%	32.00%
Accident and health insurance
Insurance revenues
Gross Amount	$ 3,296	$ 2,994	$ 2,383
Ceded Amount	79	72	66
Assumed From Other Companies	82	180	765
Premiums Earned, Net	$ 3,299	$ 3,102	$ 3,082
Percentage of Amount Assumed to Net	2.00%	6.00%	25.00%