Condensed Consolidated Statements of Equity - USD ($)	Total	Total AIG Shareholders' Equity	Preferred Stock and Additional Paid-In Capital	Common Stock	Treasury Stock	Additional Paid-in Capital	Retained Earnings	Accumulated Other Comprehensive Income (Loss)	Non redeemable Non-controlling Interests
Cumulative effect of change in accounting principle, net of tax	$ (8,000,000)	$ (8,000,000)	$ 0	$ 0	$ 0	$ 0	$ 568,000,000	$ (576,000,000)	$ 0
Balance at Dec. 31, 2017	65,708,000,000	65,171,000,000	0	4,766,000,000	(47,595,000,000)	81,078,000,000	21,457,000,000	5,465,000,000	537,000,000
Common stock issued under stock plans	(150,000,000)	(150,000,000)	0	0	187,000,000	(337,000,000)	0	0	0
Purchase of common stock	(994,000,000)	(994,000,000)	0	0	(994,000,000)	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	621,000,000	616,000,000	0	0	0	0	616,000,000	0	5,000,000
Dividends on common stock	(858,000,000)	(858,000,000)	0	0	0	0	(858,000,000)	0	0
Other comprehensive income (loss)	(5,425,000,000)	(5,425,000,000)	0	0	0	0	0	(5,425,000,000)	0
Net increase (decrease) due to acquisitions and consolidations	99,000,000	0	0	0	0	0	0	0	99,000,000
Contributions from noncontrolling interests	21,000,000	0	0	0	0	0	0	0	21,000,000
Distributions to noncontrolling interests	(65,000,000)	0	0	0	0	0	0	0	(65,000,000)
Other	228,000,000	234,000,000	0	0	1,000,000	267,000,000	(34,000,000)	0	(6,000,000)
Balance at Sep. 30, 2018	59,177,000,000	58,586,000,000	0	4,766,000,000	(48,401,000,000)	81,008,000,000	21,749,000,000	(536,000,000)	591,000,000
Cumulative effect of change in accounting principle, net of tax	0	0	0	0	0	0	0	0	0
Balance at Jun. 30, 2018	61,797,000,000	61,186,000,000	0	4,766,000,000	(48,052,000,000)	80,924,000,000	23,318,000,000	230,000,000	611,000,000
Common stock issued under stock plans	0	0	0	0	0	0	0	0	0
Purchase of common stock	(348,000,000)	(348,000,000)	0	0	(348,000,000)	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	(1,259,000,000)	(1,259,000,000)	0	0	0	0	(1,259,000,000)	0	0
Dividends on common stock	(283,000,000)	(283,000,000)	0	0	0	0	(283,000,000)	0	0
Other comprehensive income (loss)	(766,000,000)	(766,000,000)	0	0	0	0	0	(766,000,000)	0
Net increase (decrease) due to acquisitions and consolidations	1,000,000	0	0	0	0	0	0	0	1,000,000
Contributions from noncontrolling interests	18,000,000	0	0	0	0	0	0	0	18,000,000
Distributions to noncontrolling interests	(38,000,000)	0	0	0	0	0	0	0	(38,000,000)
Other	55,000,000	56,000,000	0	0	(1,000,000)	84,000,000	(27,000,000)	0	(1,000,000)
Balance at Sep. 30, 2018	59,177,000,000	58,586,000,000	0	4,766,000,000	(48,401,000,000)	81,008,000,000	21,749,000,000	(536,000,000)	591,000,000
Balance at Dec. 31, 2018	57,309,000,000	56,361,000,000	0	4,766,000,000	(49,144,000,000)	81,268,000,000	20,884,000,000	(1,413,000,000)	948,000,000
Preferred stock issued	485,000,000	485,000,000	485,000,000	0	0	0	0	0	0
Common stock issued under stock plans	(77,000,000)	(77,000,000)	0	0	154,000,000	(231,000,000)	0	0	0
Purchase of common stock	0	0	0	0	0	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	3,300,000,000	2,419,000,000	0	0	0	0	2,419,000,000	0	881,000,000
Dividends on preferred stock	(15,000,000)	(15,000,000)	0	0	0	0	(15,000,000)	0	0
Dividends on common stock	(835,000,000)	(835,000,000)	0	0	0	0	(835,000,000)	0	0
Other comprehensive income (loss)	7,048,000,000	7,028,000,000	0	0	0	0	0	7,028,000,000	20,000,000
Current and deferred income taxes	0	0	0	0	0	0	0	0	0
Net increase (decrease) due to acquisitions and consolidations	78,000,000	0	0	0	0	0	0	0	78,000,000
Contributions from noncontrolling interests	13,000,000	0	0	0	0	0	0	0	13,000,000
Distributions to noncontrolling interests	(106,000,000)	0	0	0	0	0	0	0	(106,000,000)
Other	245,000,000	237,000,000	0	0	1,000,000	250,000,000	(14,000,000)	0	8,000,000
Balance at Sep. 30, 2019	67,445,000,000	65,603,000,000	485,000,000	4,766,000,000	(48,989,000,000)	81,287,000,000	22,439,000,000	5,615,000,000	1,842,000,000
Balance at Jun. 30, 2019	66,105,000,000	64,539,000,000	485,000,000	4,766,000,000	(48,991,000,000)	81,211,000,000	22,077,000,000	4,991,000,000	1,566,000,000
Preferred stock issued	0	0	0	0	0	0	0	0	0
Common stock issued under stock plans	1,000,000	1,000,000	0	0	1,000,000	0	0	0	0
Purchase of common stock	0	0	0	0	0	0	0	0	0
Net income (loss) attributable to AIG or other noncontrolling interests	973,000,000	656,000,000	0	0	0	0	656,000,000	0	317,000,000
Dividends on preferred stock	(8,000,000)	(8,000,000)	0	0	0	0	(8,000,000)	0	0
Dividends on common stock	(278,000,000)	(278,000,000)	0	0	0	0	(278,000,000)	0	0
Other comprehensive income (loss)	628,000,000	624,000,000	0	0	0	0	0	624,000,000	4,000,000
Current and deferred income taxes	0	0	0	0	0	0	0	0	0
Net increase (decrease) due to acquisitions and consolidations	(18,000,000)	0	0	0	0	0	0	0	(18,000,000)
Contributions from noncontrolling interests	11,000,000	0	0	0	0	0	0	0	11,000,000
Distributions to noncontrolling interests	(37,000,000)	0	0	0	0	0	0	0	(37,000,000)
Other	68,000,000	69,000,000	0	0	1,000,000	76,000,000	(8,000,000)	0	(1,000,000)
Balance at Sep. 30, 2019	67,445,000,000	$ 65,603,000,000	$ 485,000,000	$ 4,766,000,000	$ (48,989,000,000)	$ 81,287,000,000	$ 22,439,000,000	$ 5,615,000,000	$ 1,842,000,000
Cumulative effect of change in accounting principle, net of tax	$ 625,000,000