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Long-Term Debt - Additional Information (Details) £ in Millions, $ in Millions, $ in Millions |  | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | ---
Oct. 29, 2021 CAD ($) tranche | Dec. 31, 2023 CAD ($) | Dec. 31, 2022 CAD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2023 AUD ($) | Jun. 27, 2023 CAD ($) | Jun. 16, 2023 GBP (£) | Dec. 31, 2022 USD ($) | Dec. 23, 2022 GBP (£) | Oct. 08, 2020 CAD ($)
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 6.78% | 6.09% | 6.78% | 6.78% |  |  | 6.09% |  |
Number of tranches | tranche | 2 |  |  |  |  |  |  |  |  |
Additional revolving credit facilities amount | $ 600,000,000 |  |  |  |  |  |  |  |  |
Letter of credit outstanding |  | $ 2,400,000 | $ 2,600,000 |  |  |  |  |  |  |
Bank indebtedness |  | 23,600,000 | 65,400,000 |  |  |  |  |  |  |
Letter of credit issued and outstanding in addition |  | 57,000,000.0 | 66,900,000 |  |  |  |  |  |  |
Expire before 2022 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Letter of credit issued and outstanding in addition |  | 41,600,000 | 54,600,000 |  |  |  |  |  |  |
Open-ended terms |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Letter of credit issued and outstanding in addition |  | 15,400,000 | 12,300,000 |  |  |  |  |  |  |
Senior unsecured notes |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Notional amount |  |  |  |  |  | $ 250,000,000 |  |  |  | $ 300,000,000
Borrowings, interest rate |  |  |  |  |  | 5.393% |  |  |  | 2.048%
Revolving credit facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Revolving credit facilities amount | 800,000,000 | 800,000,000 |  |  |  |  |  |  |  |
Amount available under the facility |  | 718,100,000 | 223,600,000 |  |  |  |  |  |  |
Revolving credit facility | Canadian Dollars |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Payable amount |  |  | 376,000,000.0 |  |  |  |  |  |  |
Revolving credit facility | US dollars |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Payable amount |  | $ 79,500,000 | $ 157,000,000.0 | $ 60.0 |  |  |  | $ 116.0 |  |
Term loan facilities |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Revolving credit facilities amount | $ 310,000,000 |  |  |  |  |  |  |  |  |
Unsecured bilateral |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Revolving credit facilities amount | £ |  |  |  |  |  |  | £ 100 |  |  |
Unsecured multicurrency facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 6.59% | 5.18% | 6.59% | 6.59% |  |  | 5.18% |  |
Revolving credit facilities amount | £ |  |  |  |  |  |  |  |  | £ 20 |
Payable amount |  | $ 23,600,000 | $ 24,600,000 |  |  |  |  |  |  |
Overdraft facility |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Revolving credit facilities amount |  |  |  |  | $ 5 |  |  |  |  |
Syndicated senior credit facilities | Canadian Dollars |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Bank indebtedness |  | 0 | 40,800,000 |  |  |  |  |  |  |
Notes payable |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Aggregate maturity value of notes |  | $ 84,300,000 | $ 62,800,000 |  |  |  |  |  |  |
Notes payable | Weighted average |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 3.90% | 1.60% | 3.90% | 3.90% |  |  | 1.60% |  |
Software financing obligations |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Borrowings, interest rate |  | 5.94% | 5.94% | 5.94% | 5.94% |  |  | 5.94% |  |
Software additions acquired through software financing obligations |  | $ 600,000 | $ 19,300,000 |  |  |  |  |  |  |
Letter of credit |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Revolving credit facilities amount |  | 100,000,000 |  |  |  |  |  |  |  |
Surety facilities |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Bonds issued under surety facilities |  | 16,600,000 | 27,100,000 |  |  |  |  |  |  |
Surety facilities expiring before September 2026 |  |  |  |  |  |  |  |  |  |
Disclosure of detailed information about borrowings [line items] |  |  |  |  |  |  |  |  |  |
Bonds issued under surety facilities |  | $ 20,300,000 | $ 18,800,000 |  |  |  |  |  |  |

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