Note 7. Derivative Instruments - Textuals (Details) - Foreign Exchange Contract € in Millions, $ in Millions	3 Months Ended	12 Months Ended
	Sep. 30, 2015 USD ($)	Jun. 30, 2015	Sep. 30, 2015 EUR (€)	Sep. 30, 2015 USD ($)
Derivatives, Fair Value
Cash Flow Hedge Gain (Loss) to be Reclassified within Twelve Months	$ (4.3)
Derivative, Notional Amount			€ 53.8	$ 33.7
Derivative Instruments, Gain (Loss) Reclassification from Accumulated OCI to Income, Estimate of Time to Transfer	12 months	12 months