EARNINGS PER SHARE (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Numerator for EPS:
Income (Loss) from Continuing Operations	$ 937	$ 950
Less:
Net income from continuing operations attributable to noncontrolling interests	283	11
Net income (loss) attributable to AIG common shareholders from continuing operations	654	939
Loss from discontinued operations, net of income tax expense	0	(1)
Net income (loss) attributable to AIG common shareholders	$ 654	$ 938
Denominator for EPS:
Weighted average shares outstanding - basic	875,383,084	907,951,597
Dilutive shares	2,129,160	17,314,980
Weighted average shares outstanding - diluted	877,512,244	925,266,577
Basic:
Income from continuing operations	$ 0.75	$ 1.03
Income from discontinued operations	0	0
Net income (loss) attributable to AIG	0.75	1.03
Diluted:
Income from continuing operations	0.75	1.01
Income from discontinued operations	0	0
Net Income (loss) attributable to AIG	$ 0.75	$ 1.01
Number of shares, warrants, and options excluded from diluted shares outstanding because the effect would have been anti-dilutive	64,300,000	700,000