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Financial Instruments (Details) - Jun. 30, 2021
$ in Millions, $ in Millions
CAD ($)
USD ($)
AUD ($)
Foreign Exchange Contracts, Canadian      
Foreign exchange contracts outstanding $ 5.0 $ 4,000,000.0  
Unrealized gains based on quarter-end exchange rates   0  
Foreign Exchange Contracts Australian      
Foreign exchange contracts outstanding   4,000,000.0 $ 5.1
Unrealized gains based on quarter-end exchange rates   $ 141,000