Canadian Customs Duty Examination - Textuals (Details) - CBSA $ in Millions, $ in Millions	1 Months Ended		3 Months Ended
	Mar. 31, 2018 CAD ($)	Mar. 31, 2018 USD ($)	Apr. 30, 2021 CAD ($)	Apr. 30, 2021 USD ($)
Canadian Customs Duty Examination [Line Items]
Value of bond issued for prepayments of additional duties	$ 26.9	$ 20.9
Taxes paid and deferred for higher dutiable values				$ 0.0
Deferred higher dutiable value			$ 14.4	$ 11.6