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INVESTMENTS (Details - Amortized cost or cost and fair value of Available for sale securities) - USD ($)
$ in Millions
Sep. 30, 2017
Dec. 31, 2016
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total $ 225,417 $ 233,938
Available for sale securities, Gross Unrealized Gains 15,407 12,817
Available for sale securities, Gross Unrealized Losses (1,346) (3,140)
Available-for-sale Securities 239,478 243,615
AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,828 1,265
Bonds available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 224,143 232,241
Available for sale securities, Gross Unrealized Gains 14,965 12,421
Available for sale securities, Gross Unrealized Losses (1,337) (3,125)
Available-for-sale Securities 237,771 241,537
Other details of available for sale securities    
Available for sale securities not rated or rated below investment grade 31,200 33,600
Bonds available for sale | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,828 1,265
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 2,252 1,870
Available for sale securities, Gross Unrealized Gains 152 148
Available for sale securities, Gross Unrealized Losses (20) (26)
Available-for-sale Securities 2,384 1,992
Bonds available for sale | U.S. government and government sponsored entities | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 0 0
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 17,637 24,025
Available for sale securities, Gross Unrealized Gains 1,235 1,001
Available for sale securities, Gross Unrealized Losses (41) (254)
Available-for-sale Securities 18,831 24,772
Bonds available for sale | Obligations of states, municipalities and political subdivisions | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 0 0
Bonds available for sale | Non-U.S. government    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 14,885 14,018
Available for sale securities, Gross Unrealized Gains 808 773
Available for sale securities, Gross Unrealized Losses (100) (256)
Available-for-sale Securities 15,593 14,535
Bonds available for sale | Non-U.S. government | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 0 0
Bonds available for sale | Corporate debt    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 126,014 126,648
Available for sale securities, Gross Unrealized Gains 8,519 7,271
Available for sale securities, Gross Unrealized Losses (848) (1,739)
Available-for-sale Securities 133,685 132,180
Bonds available for sale | Corporate debt | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 10 (31)
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 63,355 65,680
Available for sale securities, Gross Unrealized Gains 4,251 3,228
Available for sale securities, Gross Unrealized Losses (328) (850)
Available-for-sale Securities 67,278 68,058
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 1,818 1,296
Bonds available for sale | Residential mortgage-backed securities (RMBS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 34,270 35,311
Available for sale securities, Gross Unrealized Gains 3,421 2,541
Available for sale securities, Gross Unrealized Losses (182) (478)
Available-for-sale Securities 37,509 37,374
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 1,737 1,212
Bonds available for sale | Commercial mortgage-backed securities (CMBS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 13,154 14,054
Available for sale securities, Gross Unrealized Gains 456 409
Available for sale securities, Gross Unrealized Losses (92) (192)
Available-for-sale Securities 13,518 14,271
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 52 45
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 15,931 16,315
Available for sale securities, Gross Unrealized Gains 374 278
Available for sale securities, Gross Unrealized Losses (54) (180)
Available-for-sale Securities 16,251 16,413
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 29 39
Equity securities available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 1,274 1,697
Available for sale securities, Gross Unrealized Gains 442 396
Available for sale securities, Gross Unrealized Losses (9) (15)
Available-for-sale Securities 1,707 2,078
Equity securities available for sale | Common Stock    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 708 708
Available for sale securities, Gross Unrealized Gains 357 369
Available for sale securities, Gross Unrealized Losses (9) (12)
Available-for-sale Securities 1,056 1,065
Equity securities available for sale | Preferred Stock    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 504 748
Available for sale securities, Gross Unrealized Gains 73 4
Available for sale securities, Gross Unrealized Losses 0 0
Available-for-sale Securities 577 752
Equity securities available for sale | Mutual Funds    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 62 241
Available for sale securities, Gross Unrealized Gains 12 23
Available for sale securities, Gross Unrealized Losses 0 (3)
Available-for-sale Securities $ 74 $ 261