Annual report pursuant to Section 13 and 15(d)

DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Assets (Details)

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DERIVATIVE FINANCIAL INSTRUMENTS - Offsetting Assets (Details) - USD ($)
$ in Millions
Dec. 31, 2018
Dec. 31, 2017
Derivative Asset [Abstract]    
Gross amounts of recognized assets $ 500 $ 322
Gross amounts offset in the consolidated balance sheets (291) (190)
Net amounts of assets presented in the consolidated balance sheets 209 132
Derivative Asset, Fair Value, Amount Not Offset Against Collateral [Abstract]    
Gross amounts not offset in the statement of financial position - financial instruments (4) (11)
Gross amounts not offset in the statement of financial position - cash collateral received (53) (18)
Net amount $ 152 $ 103