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Other Assets (Tables)
 12 Months Ended
Dec. 31, 2019
Disclosure of financial assets [abstract]  
Disclosure of components in other assets
The components of other assets are as follows:
As at Dec. 3120192018
South Hedland prepaid transmission access and distribution costs67  72  
Deferred licence fees9  11  
Project development costs19  47  
Deferred service costs—  12  
Long-term prepaids and other assets56  55  
Loan receivable47  37  
Total other assets198  234