Schedule II Condensed Financial Information of Registrant - Parent Company Only (Details - Statements of Income) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Jun. 30, 2016	Mar. 31, 2016	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Net realized capital gains (losses)									$ (1,380)	$ (1,944)	$ 776
Other income									2,412	3,121	4,088
Expenses
Interest expense									1,168	1,260	1,281
(Gains) losses on extinguishment of debt	$ 1	$ (1)	$ 4	$ 1	$ 2	$ 14	$ (7)	$ (83)	(5)	74	756
Net (gain) loss on sale of divested businesses	241	(13)	(60)	(100)	194	128	225	(2)	(68)	(545)	11
Income from continuing operations before income tax expense (benefit)	875	(2,803)	1,667	1,727	(3,455)	737	2,858	(214)	1,466	(74)	3,281
Income tax expense (benefit)									7,526	185	1,059
Net income (loss) attributable to AIG common shareholders from continuing operations									(6,088)	(759)	2,196
Income (loss) from discontinued operations	(3)	(1)	8	0	(36)	3	(10)	(47)	4	(90)	0
Net income (loss) attributable to AIG	$ (6,660)	$ (1,739)	$ 1,130	$ 1,185	$ (3,041)	$ 462	$ 1,913	$ (183)	(6,084)	(849)	2,196
United Guaranty Asia
Expenses
Net (gain) loss on sale of divested businesses										(697)
Parent Company [Member]
Revenues:
Equity in undistributed net income (loss) of consolidated subsidiaries									(2,375)	(8,633)	(2,929)
Dividend income from consolidated subsidiaries									2,226	7,364	6,883
Interest income									656	411	342
Net realized capital gains (losses)									46	2	(587)
Other income									189	103	333
Expenses
Interest expense									949	988	1,049
(Gains) losses on extinguishment of debt									2	77	703
Net (gain) loss on sale of divested businesses									30	(690)	11
Other expenses									922	985	1,167
Income from continuing operations before income tax expense (benefit)									(1,161)	(2,113)	1,112
Income tax expense (benefit)									4,922	(1,301)	(1,086)
Net income (loss) attributable to AIG common shareholders from continuing operations									(6,083)	(812)	2,198
Income (loss) from discontinued operations									(1)	(37)	(2)
Net income (loss) attributable to AIG									$ (6,084)	$ (849)	$ 2,196