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INVESTMENTS (Details - Amortized cost or cost and fair value of Available for sale securities) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total $ 223,080 $ 226,766
Available for sale securities, Gross Unrealized Gains 9,646 15,315
Available for sale securities, Gross Unrealized Losses (4,053) (1,381)
Available-for-sale Securities 228,673 240,700
AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,479 1,656
Bonds available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 223,080 225,461
Available for sale securities, Gross Unrealized Gains 9,646 14,891
Available for sale securities, Gross Unrealized Losses (4,053) (1,360)
Available-for-sale Securities 228,673 238,992
Other details of available for sale securities    
Available for sale securities not rated or rated below investment grade 30,200 31,500
Bonds available for sale | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,479 1,656
Bonds available for sale | U.S. government and government sponsored entities    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 2,580 2,532
Available for sale securities, Gross Unrealized Gains 109 160
Available for sale securities, Gross Unrealized Losses (45) (36)
Available-for-sale Securities 2,644 2,656
Bonds available for sale | Obligations of states, municipalities and political subdivisions    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 16,339 17,377
Available for sale securities, Gross Unrealized Gains 812 1,297
Available for sale securities, Gross Unrealized Losses (91) (30)
Available-for-sale Securities 17,060 18,644
Bonds available for sale | Non-U.S. governments    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 15,106 15,059
Available for sale securities, Gross Unrealized Gains 489 717
Available for sale securities, Gross Unrealized Losses (298) (117)
Available-for-sale Securities 15,297 15,659
Bonds available for sale | Corporate debt    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 126,059 126,310
Available for sale securities, Gross Unrealized Gains 4,716 8,666
Available for sale securities, Gross Unrealized Losses (2,817) (800)
Available-for-sale Securities 127,958 134,176
Bonds available for sale | Corporate debt | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 4 17
Bonds available for sale | Mortgage-backed, asset-backed and collateralized    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 62,996 64,183
Available for sale securities, Gross Unrealized Gains 3,520 4,051
Available for sale securities, Gross Unrealized Losses (802) (377)
Available-for-sale Securities 65,714 67,857
Bonds available for sale | Mortgage-backed, asset-backed and collateralized | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,475 1,639
Bonds available for sale | Residential mortgage-backed securities (RMBS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 32,746 34,181
Available for sale securities, Gross Unrealized Gains 3,071 3,273
Available for sale securities, Gross Unrealized Losses (437) (220)
Available-for-sale Securities 35,380 37,234
Bonds available for sale | Residential mortgage-backed securities (RMBS) | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,416 1,568
Bonds available for sale | Commercial mortgage-backed securities (CMBS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 13,146 13,538
Available for sale securities, Gross Unrealized Gains 215 408
Available for sale securities, Gross Unrealized Losses (277) (105)
Available-for-sale Securities 13,084 13,841
Bonds available for sale | Commercial mortgage-backed securities (CMBS) | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 35 42
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 17,104 16,464
Available for sale securities, Gross Unrealized Gains 234 370
Available for sale securities, Gross Unrealized Losses (88) (52)
Available-for-sale Securities 17,250 16,782
Bonds available for sale | Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS) | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 24 29
Equity securities available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 0 1,305
Available for sale securities, Gross Unrealized Gains 0 424
Available for sale securities, Gross Unrealized Losses 0 (21)
Available-for-sale Securities 0 1,708
Equity securities available for sale | Common Stock    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 0 703
Available for sale securities, Gross Unrealized Gains 0 379
Available for sale securities, Gross Unrealized Losses 0 (21)
Available-for-sale Securities 0 1,061
Equity securities available for sale | Preferred Stock    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 0 504
Available for sale securities, Gross Unrealized Gains 0 29
Available for sale securities, Gross Unrealized Losses 0 0
Available-for-sale Securities 0 533
Equity securities available for sale | Mutual Funds    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 0 98
Available for sale securities, Gross Unrealized Gains 0 16
Available for sale securities, Gross Unrealized Losses 0 0
Available-for-sale Securities $ 0 $ 114