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LEASES (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2020
Jun. 30, 2019
Jun. 30, 2020
Jun. 30, 2019
Dec. 31, 2019
Lessee Disclosure [Abstract]          
Operating Lease, Right-of-Use Asset $ 180   $ 180   $ 197
Operating Lease, Right-of-Use Asset, Reclassified 8   8   $ 8
Lessee, Operating Lease, Liability, Payments, Remainder of Fiscal Year 33   33    
Lessee, Operating Lease, Liability, Payments, Due Year Two 55   55    
Lessee, Operating Lease, Liability, Payments, Due Year Three 41   41    
Lessee, Operating Lease, Liability, Payments, Due Year Four 27   27    
Lessee, Operating Lease, Liability, Payments, Due Year Five 15   15    
Lessee, Operating Lease, Liability, Payments, Due after Year Five 32   32    
Lessee, Operating Lease, Liability, Payments, Due 203   203    
Lessee, Operating Lease, Liability, Undiscounted Excess Amount 20   20    
Operating Lease, Liability 183   183    
Operating Lease, Liability, Current 29   29    
Operating Lease, Liability, Noncurrent 154   154    
Lease, Cost [Abstract]          
Operating Lease, Cost 18 $ 17 37 $ 32  
Short-term Lease, Cost 10 9 19 20  
Sublease Income (1) (1) (2) (1)  
Lease, Cost 27 25 54 51  
Operating Lease, Payments 18 18 36 35  
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability $ 14 $ 10 $ 30 $ 21  
Operating Lease, Weighted Average Remaining Lease Term 5 years 6 years 5 years 6 years  
Operating Lease, Weighted Average Discount Rate, Percent 3.90% 4.20% 3.90% 4.20%