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	Jun. 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	$ 83,118	$ 31,657
Gross Unrealized Losses, Less than 12 Months	3,039	726
Fair Value, 12 Months or More	13,617	15,127
Gross Unrealized Losses, 12 Months or More	1,014	655
Fair Value, Total	96,735	46,784
Gross Unrealized Losses, Total	4,053	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	83,118	31,520
Gross Unrealized Losses, Less than 12 Months	3,039	705
Fair Value, 12 Months or More	13,617	15,127
Gross Unrealized Losses, 12 Months or More	1,014	655
Fair Value, Total	96,735	46,647
Gross Unrealized Losses, Total	$ 4,053	1,360
Number of securities in an unrealized loss position | item	14,992
Number of individual securities in continuous unrealized loss position for longer than twelve months | item	1,961
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	$ 1,090	770
Gross Unrealized Losses, Less than 12 Months	30	23
Fair Value, 12 Months or More	293	332
Gross Unrealized Losses, 12 Months or More	15	13
Fair Value, Total	1,383	1,102
Gross Unrealized Losses, Total	45	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	2,438	586
Gross Unrealized Losses, Less than 12 Months	54	6
Fair Value, 12 Months or More	548	646
Gross Unrealized Losses, 12 Months or More	37	24
Fair Value, Total	2,986	1,232
Gross Unrealized Losses, Total	91	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	5,982	3,511
Gross Unrealized Losses, Less than 12 Months	210	54
Fair Value, 12 Months or More	1,058	857
Gross Unrealized Losses, 12 Months or More	88	63
Fair Value, Total	7,040	4,368
Gross Unrealized Losses, Total	298	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	51,762	15,578
Gross Unrealized Losses, Less than 12 Months	2,256	453
Fair Value, 12 Months or More	6,610	7,291
Gross Unrealized Losses, 12 Months or More	561	347
Fair Value, Total	58,372	22,869
Gross Unrealized Losses, Total	2,817	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	8,848	6,212
Gross Unrealized Losses, Less than 12 Months	250	99
Fair Value, 12 Months or More	2,984	3,790
Gross Unrealized Losses, 12 Months or More	187	121
Fair Value, Total	11,832	10,002
Gross Unrealized Losses, Total	437	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	6,485	3,408
Gross Unrealized Losses, Less than 12 Months	179	46
Fair Value, 12 Months or More	1,334	1,389
Gross Unrealized Losses, 12 Months or More	98	59
Fair Value, Total	7,819	4,797
Gross Unrealized Losses, Total	277	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	6,513	1,455
Gross Unrealized Losses, Less than 12 Months	60	24
Fair Value, 12 Months or More	790	822
Gross Unrealized Losses, 12 Months or More	28	28
Fair Value, Total	7,303	2,277
Gross Unrealized Losses, Total	88	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