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BUSINESS AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Details 2) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Not primary beneficiary    
Variable interest entity    
VIEs maximum exposures to loss $ 3,916 $ 4,523
Primary beneficiary    
Variable interest entity    
VIEs maximum exposures to loss $ 49 $ 1