Financial Instruments and Risk Management, Schedule of Fair Value, Assets and Liabilities Measured on Recurring Basis (Details) - Level 2 - Fair Value, Measurements, Recurring - USD ($) $ in Millions	Jun. 30, 2016	Sep. 30, 2015
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Deferred Compensation	$ (48.0)	$ (58.5)
Derivatives - Foreign Currency Contracts	(0.2)	4.5
Net Liabilities at estimated fair value	(58.3)	(59.2)
Interest Rate Contract
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Derivatives - Foreign Currency Contracts	$ (10.1)	$ (5.2)