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Note 8. Derivative Instruments - Textuals (Details) - Foreign Exchange Contract
€ in Millions, $ in Millions
3 Months Ended 12 Months Ended
Sep. 30, 2021
USD ($)
Jun. 30, 2021
Sep. 30, 2021
EUR (€)
Derivatives, Fair Value      
Derivative, Notional Amount $ 46.0   € 49.2
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months $ (2.4)    
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer 12 months 12 months