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BORROWINGS Part 3 (Details) Fair Value - Fair Value, Recurring [Member] - USD ($)
$ in Millions
Mar. 31, 2021
Dec. 31, 2020
Fair Value, Inputs, Level 2 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Instrument, Fair Value Disclosure $ 6,153 $ 6,449
Fair Value, Inputs, Level 3 [Member]    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Debt Instrument, Fair Value Disclosure $ 0 $ 0