INVESTMENTS (Details - Summary of fair value and gross unrealized losses on available for sale securities aggregated by major investment category and length of time in a continuous unrealized loss position) $ in Millions	Sep. 30, 2018 USD ($) item	Dec. 31, 2017 USD ($)
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	$ 83,025	$ 31,657
Gross Unrealized Losses, Less than 12 Months	2,748	726
Fair Value, 12 Months or More	21,250	15,127
Gross Unrealized Losses, 12 Months or More	1,424	655
Fair Value, Total	104,275	46,784
Gross Unrealized Losses, Total	4,172	1,381
Bonds available for sale
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	83,025	31,520
Gross Unrealized Losses, Less than 12 Months	2,748	705
Fair Value, 12 Months or More	21,250	15,127
Gross Unrealized Losses, 12 Months or More	1,424	655
Fair Value, Total	104,275	46,647
Gross Unrealized Losses, Total	$ 4,172	1,360
Number of securities in an unrealized loss position | item	16,950
Number of individual securities in continuous unrealized loss position for longer than twelve months | item	3,008
Bonds available for sale | U.S. government and government sponsored entities
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	$ 1,406	770
Gross Unrealized Losses, Less than 12 Months	61	23
Fair Value, 12 Months or More	364	332
Gross Unrealized Losses, 12 Months or More	16	13
Fair Value, Total	1,770	1,102
Gross Unrealized Losses, Total	77	36
Bonds available for sale | Obligations of states, municipalities and political subdivisions
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	3,475	586
Gross Unrealized Losses, Less than 12 Months	98	6
Fair Value, 12 Months or More	743	646
Gross Unrealized Losses, 12 Months or More	52	24
Fair Value, Total	4,218	1,232
Gross Unrealized Losses, Total	150	30
Bonds available for sale | Non-U.S. governments
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	5,079	3,511
Gross Unrealized Losses, Less than 12 Months	172	54
Fair Value, 12 Months or More	1,821	857
Gross Unrealized Losses, 12 Months or More	108	63
Fair Value, Total	6,900	4,368
Gross Unrealized Losses, Total	280	117
Bonds available for sale | Corporate debt
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	52,590	15,578
Gross Unrealized Losses, Less than 12 Months	1,947	453
Fair Value, 12 Months or More	9,929	7,291
Gross Unrealized Losses, 12 Months or More	734	347
Fair Value, Total	62,519	22,869
Gross Unrealized Losses, Total	2,681	800
Bonds available for sale | Residential mortgage-backed securities (RMBS)
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	7,930	6,212
Gross Unrealized Losses, Less than 12 Months	245	99
Fair Value, 12 Months or More	4,706	3,790
Gross Unrealized Losses, 12 Months or More	315	121
Fair Value, Total	12,636	10,002
Gross Unrealized Losses, Total	560	220
Bonds available for sale | Commercial mortgage-backed securities (CMBS)
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	5,062	3,408
Gross Unrealized Losses, Less than 12 Months	146	46
Fair Value, 12 Months or More	2,626	1,389
Gross Unrealized Losses, 12 Months or More	166	59
Fair Value, Total	7,688	4,797
Gross Unrealized Losses, Total	312	105
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS)
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	7,483	1,455
Gross Unrealized Losses, Less than 12 Months	79	24
Fair Value, 12 Months or More	1,061	822
Gross Unrealized Losses, 12 Months or More	33	28
Fair Value, Total	8,544	2,277
Gross Unrealized Losses, Total	112	52
Equity securities available for sale
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	0	137
Gross Unrealized Losses, Less than 12 Months	0	21
Fair Value, 12 Months or More	0
Gross Unrealized Losses, 12 Months or More	0
Fair Value, Total	0	137
Gross Unrealized Losses, Total	0	21
Equity securities available for sale | Common Stock
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	0	136
Gross Unrealized Losses, Less than 12 Months	0	21
Fair Value, 12 Months or More	0
Gross Unrealized Losses, 12 Months or More	0
Fair Value, Total	0	136
Gross Unrealized Losses, Total	0	21
Equity securities available for sale | Mutual Funds
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	0	1
Gross Unrealized Losses, Less than 12 Months	0	0
Fair Value, 12 Months or More	0
Gross Unrealized Losses, 12 Months or More	0
Fair Value, Total	0	1
Gross Unrealized Losses, Total	$ 0	$ 0