Income Taxes (Components of the Income Taxes Provision) (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Current Income Tax Expense
Federal, Current	$ 176.1	$ 17.2	$ 97.6
State, Current	16.8	12.8	6.5
Foreign, Current	220.1	210.5	191.0
Current Tax Provision	413.0	240.5	295.1
Deferred Income Tax Expense
Federal, Deferred	(3.5)	98.2	27.7
State, Deferred	19.1	(2.7)	(7.8)
Foreign, Deferred	(12.7)	30.0	(7.1)
Deferred Tax Provision	2.9	125.5	12.8
Income tax provision	$ 415.9	$ 366.0	$ 307.9