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	Mar. 31, 2019 USD ($) item	Dec. 31, 2018 USD ($)
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	$ 32,851	$ 70,800
Gross Unrealized Losses, Less than 12 Months	782	2,679
Fair Value, 12 Months or More	32,950	36,110
Gross Unrealized Losses, 12 Months or More	1,216	2,129
Fair Value, Total	65,801	106,910
Gross Unrealized Losses, Total	1,998	4,808
Bonds available for sale
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	32,851	70,800
Gross Unrealized Losses, Less than 12 Months	782	2,679
Fair Value, 12 Months or More	32,950	36,110
Gross Unrealized Losses, 12 Months or More	1,216	2,129
Fair Value, Total	65,801	106,910
Gross Unrealized Losses, Total	$ 1,998	4,808
Number of securities in an unrealized loss position | item	10,388
Number of individual securities in continuous unrealized loss position for longer than twelve months | item	4,656
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	$ 508	574
Gross Unrealized Losses, Less than 12 Months	10	13
Fair Value, 12 Months or More	356	873
Gross Unrealized Losses, 12 Months or More	7	29
Fair Value, Total	864	1,447
Gross Unrealized Losses, Total	17	42
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	331	1,965
Gross Unrealized Losses, Less than 12 Months	8	51
Fair Value, 12 Months or More	935	1,530
Gross Unrealized Losses, 12 Months or More	35	70
Fair Value, Total	1,266	3,495
Gross Unrealized Losses, Total	43	121
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	2,642	3,851
Gross Unrealized Losses, Less than 12 Months	52	149
Fair Value, 12 Months or More	1,635	2,422
Gross Unrealized Losses, 12 Months or More	73	153
Fair Value, Total	4,277	6,273
Gross Unrealized Losses, Total	125	302
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	16,010	47,364
Gross Unrealized Losses, Less than 12 Months	520	2,181
Fair Value, 12 Months or More	21,874	20,056
Gross Unrealized Losses, 12 Months or More	889	1,466
Fair Value, Total	37,884	67,420
Gross Unrealized Losses, Total	1,409	3,647
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	4,715	5,231
Gross Unrealized Losses, Less than 12 Months	73	94
Fair Value, 12 Months or More	3,800	5,641
Gross Unrealized Losses, 12 Months or More	118	223
Fair Value, Total	8,515	10,872
Gross Unrealized Losses, Total	191	317
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	1,524	2,646
Gross Unrealized Losses, Less than 12 Months	20	47
Fair Value, 12 Months or More	2,796	4,264
Gross Unrealized Losses, 12 Months or More	69	167
Fair Value, Total	4,320	6,910
Gross Unrealized Losses, Total	89	214
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	7,121	9,169
Gross Unrealized Losses, Less than 12 Months	99	144
Fair Value, 12 Months or More	1,554	1,324
Gross Unrealized Losses, 12 Months or More	25	21
Fair Value, Total	8,675	10,493
Gross Unrealized Losses, Total	124	165
Equity securities
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	0	0
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	0
Gross Unrealized Losses, Total	0	0
Equity securities | Common Stock
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	0	0
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	0
Gross Unrealized Losses, Total	0	0
Equity securities | Mutual Funds
Fair value and gross unrealized losses on AIG's available for sale securities
Fair Value, Less than 12 Months	0	0
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	0
Gross Unrealized Losses, Total	$ 0	$ 0