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INVESTMENTS (Details - Amortized cost or cost and fair value of Available for sale securities) - Bonds available for sale - USD ($)
$ in Millions
Jun. 30, 2019
Dec. 31, 2018
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total $ 230,062 $ 225,780
Available for sale securities, Gross Unrealized Gains 16,639 8,419
Available for sale securities, Gross Unrealized Losses (1,140) (4,808)
Available-for-sale Securities 245,561 229,391
Other details of available for sale securities    
Available for sale securities not rated or rated below investment grade 28,800 28,800
AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,291 1,211
U.S. government and government sponsored entities    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 3,978 3,170
Available for sale securities, Gross Unrealized Gains 253 132
Available for sale securities, Gross Unrealized Losses (3) (42)
Available-for-sale Securities 4,228 3,260
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
Obligations of states, municipalities and political subdivisions    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 14,600 15,421
Available for sale securities, Gross Unrealized Gains 1,365 701
Available for sale securities, Gross Unrealized Losses (19) (121)
Available-for-sale Securities 15,946 16,001
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 4
Non-U.S. governments    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 14,690 14,376
Available for sale securities, Gross Unrealized Gains 800 451
Available for sale securities, Gross Unrealized Losses (90) (302)
Available-for-sale Securities 15,400 14,525
Non-U.S. governments | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 0 0
Corporate debt    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 135,357 130,436
Available for sale securities, Gross Unrealized Gains 10,030 3,911
Available for sale securities, Gross Unrealized Losses (827) (3,647)
Available-for-sale Securities 144,560 130,700
Corporate debt | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 4 4
Mortgage-backed, asset-backed and collateralized    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 61,437 62,377
Available for sale securities, Gross Unrealized Gains 4,191 3,224
Available for sale securities, Gross Unrealized Losses (201) (696)
Available-for-sale Securities 65,427 64,905
Mortgage-backed, asset-backed and collateralized | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,287 1,203
Residential mortgage-backed securities (RMBS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 30,064 31,940
Available for sale securities, Gross Unrealized Gains 3,199 2,754
Available for sale securities, Gross Unrealized Losses (87) (317)
Available-for-sale Securities 33,176 34,377
Residential mortgage-backed securities (RMBS) | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 1,238 1,155
Commercial mortgage-backed securities (CMBS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 13,074 12,673
Available for sale securities, Gross Unrealized Gains 579 242
Available for sale securities, Gross Unrealized Losses (29) (214)
Available-for-sale Securities 13,624 12,701
Commercial mortgage-backed securities (CMBS) | AOCI- OTTI    
Schedule of Available-for-sale Securities [Line Items]    
Total, Other-Than-Temporary Impairments in AOCI 31 31
Collateralized Debt Obligations/Asset-Backed Securities (CDO/ABS)    
Schedule of Available-for-sale Securities [Line Items]    
Available for sale securities, Amortized Cost, Total 18,299 17,764
Available for sale securities, Gross Unrealized Gains 413 228
Available for sale securities, Gross Unrealized Losses (85) (165)
Available-for-sale Securities 18,627 17,827
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 $ 18 $ 17