v3.20.1
LEASES - COMPONENTS OF LEASE EXPENSE (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Leases [Abstract]    
Operating lease cost $ 64 $ 80
Short-term lease cost 149 152
Variable lease cost 4 3
Sublease income (14) (30)
Total lease cost $ 203 $ 205