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INTEREST EXPENSE (Tables)
 12 Months Ended
Dec. 31, 2020
Analysis of income and expense [abstract]  
Disclosure of interest expense
US$ MILLIONS202020192018
Interest on corporate facility$19 $20 $4 
Interest on corporate debt76 63 56 
Interest on non-recourse borrowings944 738 483 
Other financing fees(1)
140 83 12 
$1,179 $904 $555