SCHEDULE IV - CONSOLIDATED REINSURANCE (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Consolidated reinsurance, net [Abstract]
Premiums Earned, Net, Total		$ 5,277	$ 4,362	$ 3,018
Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount		13,347	11,882	10,103
Ceded to Other Companies		1,920	1,883	1,817
Assumed from Other Companies		97	96	101
Premiums Earned, Net, Total		11,524	10,095	8,387
Gross Amount, Life Insurance in Force	[1]	1,477,684	1,366,563	1,014,841
Ceded to Other Companies, Life Insurance in Force	[1]	591,829	627,868	240,034
Assumed from Other Companies, Life Insurance in Force	[1]	11,009	12,295	13,476
Premiums, Net, Life Insurance in Force, Total	[1]	$ 896,864	$ 750,990	$ 788,283
Percentage of Amount Assumed to Net, Life Insurance in Force	[1]	1.20%	1.60%	1.70%
Life Insurance And Annuity [Member] | Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount	[2]	$ 10,572	$ 9,583	$ 8,783
Ceded to Other Companies	[2]	1,877	1,841	1,786
Assumed from Other Companies	[2]	88	88	90
Premiums Earned, Net, Total	[2]	$ 8,783	$ 7,830	$ 7,087
Percentage of Amount Assumed to Net	[2]	1.00%	1.10%	1.30%
Accident And Health Insurance [Member] | Embedded derivatives - Reinsurance related [Member]
Consolidated reinsurance, net [Abstract]
Gross Amount		$ 2,774	$ 2,299	$ 1,320
Ceded to Other Companies		43	42	31
Assumed from Other Companies		9	8	11
Premiums Earned, Net, Total		$ 2,740	$ 2,265	$ 1,300
Percentage of Amount Assumed to Net		0.30%	0.40%	0.80%

[1] Includes Group Protection segment and Other Operations in-force amounts.

[2] Includes insurance fees on universal life and other interest-sensitive products.