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ACCOUNTS PAYABLE AND OTHER (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Current:    
Accounts payable $ 463 $ 246
Accrued & other liabilities 585 400
Deferred revenue 154 159
Provisions 106 59
Total current 1,308 864
Non-current:    
Deferred revenue 323 300
Pension liabilities 81 100
Provisions 148 95
Other liabilities 225 298
Total non-current $ 777 $ 793
Average credit period on purchases of goods and services 30 days