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LEASES - Narrative (Details) - USD ($)
$ in Millions
Dec. 31, 2019
Dec. 31, 2018
Lessee, Lease, Description [Line Items]    
Weighted average lease term 7 years  
Weighted average discount rate 3.15%  
Lessor operating lease assets $ 761 $ 791
Lessor operating lease assets   $ 92
Minimum    
Lessee, Lease, Description [Line Items]    
Lease term 1 year  
Maximum    
Lessee, Lease, Description [Line Items]    
Lease term 10 years  
Leased assets    
Lessee, Lease, Description [Line Items]    
Lessor operating lease assets $ 57