INFORMATION PROVIDED IN CONNECTION WITH OUTSTANDING DEBT (Details - Condensed Consolidating Statements of Comprehensive Income (Loss)) - 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
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ (560)	$ (1,259)	$ 931	$ 949	$ (6,672)	$ (1,713)	$ 1,118	$ 1,211	$ 61	$ (6,056)	$ (349)
Other comprehensive income (loss)									(6,293)	2,235	693
Comprehensive income (loss)									(6,232)	(3,821)	344
Comprehensive income attributable to noncontrolling interests									76	28	500
Comprehensive income (loss) attributable to AIG									(6,308)	(3,849)	(156)
AIG (As Guarantor)
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									(6)	(6,084)	(849)
Other comprehensive income (loss)									(6,302)	2,235	693
Comprehensive income (loss)									(6,308)	(3,849)	(156)
Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive income (loss) attributable to AIG									(6,308)	(3,849)	(156)
Validus Holdings, Ltd
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									(262)
Other comprehensive income (loss)									0
Comprehensive income (loss)									(262)
Comprehensive income attributable to noncontrolling interests									0
Comprehensive income (loss) attributable to AIG									(262)
AIGLH
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									2,756	1,929	(238)
Other comprehensive income (loss)									2,508	7,851	4,080
Comprehensive income (loss)									5,264	9,780	3,842
Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive income (loss) attributable to AIG									5,264	9,780	3,842
Other Subsidiaries
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									(401)	(85)	(728)
Other comprehensive income (loss)									12,298	17,857	52,153
Comprehensive income (loss)									11,897	17,772	51,425
Comprehensive income attributable to noncontrolling interests									76	28	500
Comprehensive income (loss) attributable to AIG									11,821	17,744	50,925
Reclassification and Eliminations
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									(2,026)	(1,816)	1,466
Other comprehensive income (loss)									(14,797)	(25,708)	(56,233)
Comprehensive income (loss)									(16,823)	(27,524)	(54,767)
Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive income (loss) attributable to AIG									$ (16,823)	$ (27,524)	$ (54,767)