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, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Revenues:
Net realized capital gains (losses)									$ (130)	$ (1,380)	$ (1,944)
Other income									1,638	2,412	3,121
Expenses
Interest expense									1,309	1,168	1,260
(Gains) losses on extinguishment of debt	$ 3	$ (1)	$ (5)	$ (4)	$ 1	$ (1)	$ 4	$ 1	7	(5)	74
Net gain on sale of divested businesses	3	2	25	8	241	(13)	(60)	(100)	(38)	(68)	(545)
Income from continuing operations before income tax expense (benefit)	(695)	(1,527)	1,252	1,227	875	(2,803)	1,667	1,727	257	1,466	(74)
Income tax expense (benefit)									154	7,526	185
Net income (loss) attributable to AIG common shareholders from continuing operations									36	(6,088)	(759)
Income (loss) from discontinued operations	(2)	(39)	0	(1)	(3)	(1)	8	0	(42)	4	(90)
Net loss attributable to AIG	$ (622)	$ (1,259)	$ 937	$ 938	$ (6,660)	$ (1,739)	$ 1,130	$ 1,185	(6)	(6,084)	(849)
Parent Company [Member]
Revenues:
Equity in undistributed net income (loss) of consolidated subsidiaries									(5,160)	(2,375)	(8,633)
Dividend income from consolidated subsidiaries									4,580	2,226	7,364
Interest income									961	656	411
Net realized capital gains (losses)									(49)	46	2
Other income									26	189	103
Expenses
Interest expense									954	949	988
(Gains) losses on extinguishment of debt									0	2	77
Net gain on sale of divested businesses									3	30	(690)
Other expenses									800	922	985
Income from continuing operations before income tax expense (benefit)									(1,399)	(1,161)	(2,113)
Income tax expense (benefit)									(1,433)	4,922	(1,301)
Net income (loss) attributable to AIG common shareholders from continuing operations									34	(6,083)	(812)
Income (loss) from discontinued operations									(40)	(1)	(37)
Net loss attributable to AIG									(6)	(6,084)	(849)
Related party interest income									$ 840	$ 512	294
United Guaranty Asia
Expenses
Net gain on sale of divested businesses											$ (697)