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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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- Definition

The interest rate on borrowings. [Refer: Borrowings]

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The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

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The amount of contractual undiscounted cash flows in relation to net amounts for pay-floating (receive-fixed) interest rate swaps for which net cash flows are exchanged. [Refer: Swap contract [member]]

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Percentage of outstanding trade receivables

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