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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$222 $161 $136 
Income taxes paid$135 $96 $107 
Disclosure of changes in non-cash working capital
Details of “Changes in non-cash working capital, net” on the Consolidated Statements of Cash Flows are as follows:
 For the year ended December 31,
US$ MILLIONS202020192018
Accounts receivable$(71)$(58)$(21)
Accounts payable and other27 131 36 
Changes in non-cash working capital, net$(44)$73 $15