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Streaming transactions (Tables)
 12 Months Ended
Dec. 31, 2022
Streaming Transactions  
Separate transactions
           
    December 31, 2022   December 31, 2021
    Current liabilities   Non-current liabilities    
Cobalt streaming   28   428   505
Gold streaming   53   1,184   1,274
Contract liabilities   81   1,612   1,779
Effects on the income statement
           
    Year ended December 31,
    2022   2021   2020
Cobalt streaming   49   55   -
Gold streaming   37   43   60
Fixed revenue - Contract liabilities realized   86   98   60
             
Cobalt streaming   11   12   -
Gold streaming   74   82   114
Variable revenue - Additional payments received   85   94   114