EARNINGS PER SHARE (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Numerator for EPS:
Income (Loss) from Continuing Operations	$ 950	$ 1,211
Less:
Net income (loss) from continuing operations attributable to noncontrolling interests	11	26
Net income (loss) attributable to AIG common shareholders from continuing operations	939	1,185
Income (loss) from discontinued operations, net of income tax expense	(1)	0
Net income (loss) attributable to AIG common shareholders	$ 938	$ 1,185
Denominator for EPS:
Weighted average shares outstanding - basic	907,951,597	980,777,243
Dilutive shares	17,314,980	24,537,787
Weighted average shares outstanding - diluted	925,266,577	1,005,315,030
Basic:
Income (loss) from continuing operations	$ 1.03	$ 1.21
Income (loss) from discontinued operations	0	0
Net income (loss) attributable to AIG	1.03	1.21
Diluted:
Income (loss) from continuing operations	1.01	1.18
Income (loss) from discontinued operations	0	0
Net Income (loss) attributable to AIG	$ 1.01	$ 1.18
Number of shares, warrants, and options excluded from diluted shares outstanding because the effect would have been anti-dilutive	700,000	1,800,000