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FINANCIAL INSTRUMENTS (Summary of Fair Value of Derivatives) (Details) - Derivatives Designated as Hedging Instruments - Fixed-to-variable interest rate swaps - USD ($)
$ in Millions
Mar. 31, 2020
Dec. 31, 2019
Other assets    
Derivative [Line Items]    
Derivative Assets $ 41  
Other liabilities    
Derivative [Line Items]    
Derivative Liabilities   $ 28