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RECEIVABLES PROVISION (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Dec. 31, 2016
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]      
Balance at beginning of year $ 252 $ 174 $ 122
Provision 2,739 2,090 1,613
Utilization (2,707) (2,015) (1,561)
Other (6) 3 0
Balance at end of year $ 278 $ 252 $ 174