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BORROWINGS Part 3 (Details) Fair Value - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Jun. 30, 2020
Mar. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Line of Credit Facility, Maximum Month-end Outstanding Amount $ 0    
Borrowings due within one year 171   $ 895
364-Day Term Loan [Member] | Subsequent Event [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Borrowings due within one year   $ 250  
Fair Value, Inputs, Level 2 [Member] | Fair Value, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt Instrument, Fair Value Disclosure 6,275   6,606
Fair Value, Inputs, Level 3 [Member] | Fair Value, Recurring [Member]      
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]      
Debt Instrument, Fair Value Disclosure $ 0   $ 0