REINSURANCE (Details - Summary of the impact of modco and funds withheld) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Effects of Reinsurance [Line Items]
Net investment income		$ 3,800	$ 3,408	$ 9,674	$ 11,032
Net realized capital gains (losses)		(1,122)	929	65	887
Loss from continuing operations before income tax benefit		368	1,260	(6,735)	4,251
Income tax benefit		74	287	(918)	950
Net loss		$ 299	$ 973	$ (5,813)	$ 3,300
U.S. federal income tax at statutory rate (as a percent)		21.00%	21.00%	21.00%	21.00%
Fortitude Re funds withheld assets
Effects of Reinsurance [Line Items]
Net investment income	[1]	$ 458	$ 0	$ 574	$ 0
Net realized capital gains (losses)	[1]	32	$ 0	128	$ 0
Fortitude Holdings
Effects of Reinsurance [Line Items]
Net underwriting income		0		0
Net investment income		458		574
Net realized capital gains (losses)		(624)		(1,365)
Loss from continuing operations before income tax benefit		(166)		(791)
Income tax benefit		(35)		(166)
Net loss		(131)		(625)
Change in net unrealized gains (losses) on real estate investments		132		570
Total economic impact to AIG		1		(55)
Fortitude Holdings | Fortitude Re funds withheld assets
Effects of Reinsurance [Line Items]
Net realized capital gains (losses)		32		128
Fortitude Holdings | Fortitude Re funds withheld assets | Embedded derivatives
Effects of Reinsurance [Line Items]
Net realized capital gains (losses)		$ (656)		$ (1,493)

[1] Represents activity subsequent to the deconsolidation of Fortitude Re on June 2, 2020.