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DERIVATIVES AND HEDGE ACCOUNTING (Details - Additional Information) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Credit Derivatives [Line Items]    
Collateral posted $ 1,700 $ 2,900
Obligation to make payments on embedded credit derivatives 0  
Fair value of hybrid securities 3,900 4,400
Par value of hybrid securities 8,500 9,100
Credit Risk Related Contingent Features [Member]    
Credit Derivatives [Line Items]    
Collateral posted 453 676
Aggregate fair value of net liability position 423 $ 572
Credit Risk Related Contingent Features [Member] | Standard & Poor's, BBB Rating | Moody's, Baa2 Rating    
Credit Derivatives [Line Items]    
Additional Collateral Aggregate Fair Value $ 61