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Financial Instruments (Details) - Sep. 30, 2020
$ in Millions, $ in Millions, $ in Millions
CAD ($)
USD ($)
AUD ($)
Foreign Exchange Contracts, Canadian [Member]      
Foreign exchange contracts outstanding $ 3.0 $ 2.3  
Foreign Exchange Contracts Australian [Member]      
Foreign exchange contracts outstanding   $ 2.1 $ 2.9