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ACCOUNTS PAYABLE AND OTHER (Details) - USD ($)
$ in Millions
Dec. 31, 2020
Dec. 31, 2019
Current:    
Accounts payable $ 1,461 $ 973
Accrued liabilities 751 653
Deferred revenue 256 307
Lease liabilities 206 197
Provisions 176 214
Loans and notes payable 134 0
Other liabilities 293 66
Total current 3,277 2,410
Non-current:    
Lease liabilities 3,597 1,606
Deferred revenue 467 246
Provisions 423 327
Pension liabilities 315 148
Loans and notes payable 84 99
Other liabilities 311 144
Total non-current $ 5,197 $ 2,570