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Financial and capital risk management - Wheaton Precious Metals Corp. warrants (Details) | 1 Months Ended | 12 Months Ended
--- | --- | ---
Feb. 29, 2020 USD ($) $ / shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) EquityInstruments | Dec. 31, 2018 USD ($)
Derivative financial instruments. |  |  |  |
Financial settlement inflows (outflows) |  | $ (34,000,000) | $ (324,000,000) | $ (67,000,000)
Call options- WPM - Bought |  |  |  |
Derivative financial instruments. |  |  |  |
Notional | EquityInstruments |  |  | 10,000,000 |
Financial settlement inflows (outflows) |  | $ 25,000,000 |  |
WPM Warrants |  |  |  |
Derivative financial instruments. |  |  |  |
Notional | 10,000,000 |  |  |
Financial settlement inflows (outflows) | $ 25,000,000 |  |  |
Sale price per warrant | $ / shares | $ 2.50 |  |  |

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