EARNINGS PER SHARE (EPS) (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
Numerator for EPS:
Income (Loss) from Continuing Operations	$ (1,220)	$ (1,712)	$ 661	$ 609
Less:
Net income (loss) from continuing operations attributable to noncontrolling interests	0	26	5	40
Net income (loss) attributable to AIG common shareholders from continuing operations	(1,220)	(1,738)	656	569
Income (loss) from discontinued operations, net of income tax expense	(39)	(1)	(40)	7
Net income (loss) attributable to AIG common shareholders	$ (1,259)	$ (1,739)	$ 616	$ 576
Denominator for EPS:
Weighted average shares outstanding - basic	895,237,359	908,667,044	902,081,555	938,130,832
Dilutive shares	0	0	14,736,714	23,165,114
Weighted average shares outstanding - diluted	895,237,359	908,667,044	916,818,269	961,295,946
Basic:
Income (loss) from continuing operations	$ (1.37)	$ (1.91)	$ 0.72	$ 0.6
Income (loss) from discontinued operations	(0.04)	0	(0.04)	0.01
Net income (loss) attributable to AIG	(1.41)	(1.91)	0.68	0.61
Diluted:
Income (loss) from continuing operations	(1.37)	(1.91)	0.71	0.59
Income (loss) from discontinued operations	(0.04)	0	(0.04)	0.01
Net Income (loss) attributable to AIG	$ (1.41)	$ (1.91)	$ 0.67	$ 0.6
Number of shares, warrants, and options excluded from diluted shares outstanding because the effect would have been anti-dilutive	5,800,000	2,400,000	4,700,000	2,000,000
Dilutive Shares Excluded From Computation Of Diluted Earnings Per Share	13,538,168	22,459,868