EARNINGS PER COMMON SHARE (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Numerator for EPS:
Income from continuing operations	$ 1,654	$ 937
Less: Net income (loss) from continuing operations attributable to noncontrolling interests	(95)	283
Less: Preferred stock dividends	7	0
Income attributable to AIG common shareholders from continuing operations	1,742	654
Income from discontinued operations, net of income tax expense	0	0
Net income attributable to AIG common shareholders	$ 1,742	$ 654
Denominator for EPS:
Weighted average common shares outstanding - basic	874,213,630	875,383,084
Dilutive common shares	4,652,583	2,129,160
Weighted average common shares outstanding - diluted	878,866,213	877,512,244
Basic:
Income from continuing operations	$ 1.99	$ 0.75
Income from discontinued operations	0	0
Income attributable to AIG common shareholders	1.99	0.75
Diluted:
Income from continuing operations	1.98	0.75
Income from discontinued operations	0	0
Income attributable to AIG common shareholders	$ 1.98	$ 0.75
Number of shares excluded from diluted shares outstanding because the effect would have been anti-dilutive	67,200,000	64,300,000