Schedule II Condensed Financial Information of Registrant - Parent Company Only (Details - Statements of Comprehensive Income (Loss)) - 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
Condensed Financial Statements, Captions [Line Items]
Net income	$ (6,660)	$ (1,739)	$ 1,130	$ 1,185	$ (3,041)	$ 462	$ 1,913	$ (183)	$ (6,084)	$ (849)	$ 2,196
Other Comprehensive Income (Loss)									2,235	693	(8,086)
Comprehensive income (loss) attributable to AIG									(3,849)	(156)	(5,884)
Parent Company [Member]
Condensed Financial Statements, Captions [Line Items]
Net income									(6,084)	(849)	2,196
Other Comprehensive Income (Loss)									2,235	693	(8,080)
Comprehensive income (loss) attributable to AIG									$ (3,849)	$ (156)	$ (5,884)