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	$ 389,576	$ 392,420	$ 390,374
Ceded to Other Companies	72,110	66,770	69,768
Assumed from Other Companies	32,289	31,699	30,322
Net Amount	$ 349,755	$ 357,349	$ 350,928
Percentage of Amount Assumed to Net	9.20%	8.90%	8.60%
Premiums:
Gross Amount	$ 764	$ 868	$ 836
Ceded to Other Companies	153	126	160
Assumed from Other Companies	195	194	186
Premiums	$ 806	$ 936	$ 862
Percentage of Amount Assumed to Net	24.10%	20.70%	21.60%
Life insurance and annuities
Premiums:
Gross Amount	$ 712	$ 825	$ 787
Ceded to Other Companies	127	99	128
Assumed from Other Companies	186	185	177
Premiums	$ 771	$ 911	$ 836
Percentage of Amount Assumed to Net	24.10%	20.30%	21.20%
Accident and health
Premiums:
Gross Amount	$ 52	$ 43	$ 49
Ceded to Other Companies	26	27	32
Assumed from Other Companies	9	9	9
Premiums	$ 35	$ 25	$ 26
Percentage of Amount Assumed to Net	24.80%	36.00%	34.60%