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SUPPLEMENTAL CASH FLOW INFORMATION (Tables)
 12 Months Ended
Dec. 31, 2020
Cash Flow Statement [Abstract]  
Disclosure of interest and income taxes paid
 For the year ended
December 31,
US$ MILLIONS202020192018
Interest paid$985 $829 $507 
Income taxes paid$172 $179 $427 
Disclosure of changes in non-cash working capital
Details of “Changes in non-cash working capital, net” on the Consolidated Statements of Cash Flows are as follows:
 For the year ended
December 31,
US$ MILLIONS202020192018
Accounts receivable$284 $42 $176 
Prepayments(415)(120)5 
Accounts payable and other(89)146 (305)
Changes in non-cash working capital, net$(220)$68 $(124)