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Financial Instruments (Details) - CAD ($) $ in Millions | 1 Months Ended | 12 Months Ended |
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2021 | Dec. 31, 2020 | Oct. 31, 2017
Financial Instruments (Details) [Line Items] |  |  |  |  |
Maximum exposure to credit risk | $ 1,589.5 | $ 924.2 | $ 1,589.5 | $ 924.2 |
Allowance for doubtful accounts | 5.2 | 7.3 | 5.2 | 7.3 |
Borrowings before deferred financing costs | 3,794.7 | 3,184.8 | $ 3,794.7 | 3,184.8 |
Net increase impact of 5 percent increase (decrease) | 174.0 | 158.5 |  |  |
Other comprehensive income impact of 5 percent increase (decrease) | $ 57.0 | 35.6 |  |  |
Fixed interest rates | 2.04% |  | 2.04% |  |
Cash and cash equivalents | $ 81.0 |  | $ 81.0 |  |
Short-term investments |  | $ 130.4 |  | $ 130.4 |
Discount rate cash flow | 4.60% | 4.40% | 4.60% | 4.40% |
Bottom of range [member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
Discount rate used to discount Canadian dollar cash flows | 0.08% | 0.08% | 0.08% | 0.08% |
Top of range [member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
Discount rate used to discount Canadian dollar cash flows | 1.37% | 0.54% | 1.37% | 0.54% |
North American [Member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
North American | 54.00% | 50.00% | 54.00% | 50.00% |
International customers [Member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
North American | 46.00% | 50.00% | 46.00% | 50.00% |
Term Loan B - Canadian Facility [Member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
Variable interest rate | $ 450.0 |  | $ 450.0 |  | $ 1,800.0
Term Loan B - Canadian Facility [Member] | Bottom of range [member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
Fixed interest rates |  |  |  |  | 1.72%
Term Loan B - Canadian Facility [Member] | Top of range [member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
Fixed interest rates |  |  |  |  | 2.04%
Interest Rates Floor [Member] |  |  |  |  |
Financial Instruments (Details) [Line Items] |  |  |  |  |
Percentage of variable interest rate | 0.25% |  | 0.25% |  |
Net income loss impact of 0.25 percent change in interest rates |  |  | $ 4.9 | $ 4.1 |

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