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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2020
Disclosure of financial assets [abstract]  
Disclosure of components in other assets
The components of other assets are as follows:
As at Dec. 3120202019
South Hedland prepaid transmission access and distribution costs70 67 
Deferred licence fees— 9 
Project development costs25 19 
Long-term prepaids and other assets59 56 
Loan receivable52 47 
Total other assets206 198