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FINANCING ARRANGEMENTS - Senior Secured Credit Facilities (Details) - USD ($)
Dec. 31, 2019
Dec. 31, 2018
Mar. 28, 2017
Jan. 01, 2017
Debt Instrument [Line Items]        
Long-term debt $ 25,895,000,000 $ 24,305,000,000    
Revolving credit facility        
Debt Instrument [Line Items]        
Maximum borrowing capacity     $ 1,190,000,000 $ 1,500,000,000
Long-term debt       9,939,000,000
Amount outstanding       $ 875,000,000