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INVESTMENTS (Details - Amortized cost or cost and fair value of Available for sale securities) - USD ($)
$ in Millions
Mar. 31, 2018
Dec. 31, 2017
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total $ 225,352 $ 226,766
Available for sale securities, Gross Unrealized Gains 11,359 15,315
Available for sale securities, Gross Unrealized Losses (2,797) (1,381)
Available-for-sale Securities 233,914 240,700
AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,411 1,656
Bonds available for sale    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 225,352 225,461
Available for sale securities, Gross Unrealized Gains 11,359 14,891
Available for sale securities, Gross Unrealized Losses (2,797) (1,360)
Available-for-sale Securities 233,914 238,992
Other details of available for sale securities    
Available for sale securities not rated or rated below investment grade 30,400 31,500
Bonds available for sale | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,411 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 2,764 2,532
Available for sale securities, Gross Unrealized Gains 121 160
Available for sale securities, Gross Unrealized Losses (52) (36)
Available-for-sale Securities 2,833 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 16,943 17,377
Available for sale securities, Gross Unrealized Gains 941 1,297
Available for sale securities, Gross Unrealized Losses (73) (30)
Available-for-sale Securities 17,811 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 15,350 15,059
Available for sale securities, Gross Unrealized Gains 570 717
Available for sale securities, Gross Unrealized Losses (197) (117)
Available-for-sale Securities 15,723 15,659
Bonds available for sale | Corporate debt    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 127,106 126,310
Available for sale securities, Gross Unrealized Gains 6,020 8,666
Available for sale securities, Gross Unrealized Losses (1,787) (800)
Available-for-sale Securities 131,339 134,176
Bonds available for sale | Corporate debt | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 13 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 63,189 64,183
Available for sale securities, Gross Unrealized Gains 3,707 4,051
Available for sale securities, Gross Unrealized Losses (688) (377)
Available-for-sale Securities 66,208 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 1,398 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 33,131 34,181
Available for sale securities, Gross Unrealized Gains 3,150 3,273
Available for sale securities, Gross Unrealized Losses (392) (220)
Available-for-sale Securities 35,889 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 1,343 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 13,558 13,538
Available for sale securities, Gross Unrealized Gains 273 408
Available for sale securities, Gross Unrealized Losses (222) (105)
Available-for-sale Securities 13,609 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 29 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 16,500 16,464
Available for sale securities, Gross Unrealized Gains 284 370
Available for sale securities, Gross Unrealized Losses (74) (52)
Available-for-sale Securities 16,710 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 26 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