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BASIS OF PRESENTATION - Additional Information (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2020
Jan. 01, 2020
Dec. 31, 2019
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Retained earnings $ 16,055 $ 16,055   $ 15,718
Sales-type lease, net of investment in lease 130 130    
Service contracts, implementation costs 12 20    
Lease Term Originated in 2016        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Sales-type lease, net of investment in lease 16 16    
Lease Term Originated in 2017        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Sales-type lease, net of investment in lease 16 16    
Lease Term Originated in 2018        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Sales-type lease, net of investment in lease 46 46    
Lease Term Originated in 2019        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Sales-type lease, net of investment in lease 36 36    
Lease Term Originated in 2020        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Sales-type lease, net of investment in lease $ 16 $ 16    
Accounting Standards Update 2016-13        
New Accounting Pronouncements or Change in Accounting Principle [Line Items]        
Retained earnings     $ (4)