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Financial Instruments - Schedule of Timing of Undiscounted Cash Outflows Relating to Financial Liabilities (Details) - CAD ($) $ in Millions | Dec. 31, 2023 | Dec. 31, 2022
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Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Bank indebtedness | $ 23.6 | $ 65.4
Trade and other payables | 818.5 | 755.7
Lease liabilities | 667.8 | 708.0
Long-term debt | 1,135.1 | 1,241.3
Other financial liabilities | 5.6 | 6.0
Total contractual obligations | 2,650.6 | 2,776.4
Less than 1 Year |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Bank indebtedness | 23.6 | 65.4
Trade and other payables | 818.5 | 755.7
Lease liabilities | 119.4 | 118.7
Long-term debt | 148.4 | 54.0
Other financial liabilities | 5.3 | 4.0
Total contractual obligations | 1,115.2 | 997.8
1 to 3 Years |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Bank indebtedness | 0.0 | 0.0
Trade and other payables | 0.0 | 0.0
Lease liabilities | 228.3 | 240.1
Long-term debt | 196.3 | 192.1
Other financial liabilities | 0.3 | 2.0
Total contractual obligations | 424.9 | 434.2
After 3 Years |  |
Disclosure of maturity analysis for non-derivative financial liabilities [line items] |  |
Bank indebtedness | 0.0 | 0.0
Trade and other payables | 0.0 | 0.0
Lease liabilities | 320.1 | 349.2
Long-term debt | 790.4 | 995.2
Other financial liabilities | 0.0 | 0.0
Total contractual obligations | $ 1,110.5 | $ 1,344.4

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