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Derivative instruments - Narrative (Details) gallon in Millions, $ in Millions, $ in Millions | Jun. 30, 2024 gallon | Mar. 31, 2024 CAD ($) gallon | Dec. 31, 2023 CAD ($) gallon | Dec. 31, 2023 USD ($) gallon | Sep. 30, 2023 CAD ($) | Jun. 30, 2023 CAD ($) | Mar. 31, 2023 CAD ($) | Dec. 31, 2022 USD ($)
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Foreign exchange forward contracts |  |  |  |  |  |  |  |
Disclosure of derivative instruments [Line Items] |  |  |  |  |  |  |  |
Amount hedged per month |  |  | $ 43.0 |  | $ 44.0 | $ 44.0 | $ 40.0 |
Fair value of hedged instrument |  |  |  | $ 3.2 |  |  |  | $ 0.4
Foreign exchange forward contracts | Announcing Hedging Activity | Forecast |  |  |  |  |  |  |  |
Disclosure of derivative instruments [Line Items] |  |  |  |  |  |  |  |
Amount hedged per month |  | $ 43.0 |  |  |  |  |  |
Diesel Fuel Hedge Swap Contracts |  |  |  |  |  |  |  |
Disclosure of derivative instruments [Line Items] |  |  |  |  |  |  |  |
Fair value of hedged instrument |  |  |  | $ 1.1 |  |  |  | $ 0.3
Number of gallons hedged per month | gallon |  |  | 0.7 | 0.7 |  |  |  |
Diesel Fuel Hedge Swap Contracts | Announcing Hedging Activity | Forecast |  |  |  |  |  |  |  |
Disclosure of derivative instruments [Line Items] |  |  |  |  |  |  |  |
Number of gallons hedged per month | gallon | 0.2 | 0.7 |  |  |  |  |  |

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- Definition The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2023-01-01 -Paragraph 24A -Subparagraph a -URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_a&doctype=Standard -URIDate 2023-03-23 + Details
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- Definition The amount hedged per month by the derivative instrument. + References No definition available. + Details
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- Definition Amount Of Gallons Hedged Per Month + References No definition available. + Details
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- Definition Disclosure of derivative instruments. + References No definition available. + Details
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- Details
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- Details
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- Details
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