Income Taxes (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011	Dec. 31, 2012
Current Income Tax Expense (Benefit), Continuing Operations [Abstract]
Unrecognized Tax Benefits	$ 45.80
Unrecognized Tax Benefits That Would Impact Effective Tax Rate	31.00
Unrecognized Tax Benefits Income Tax Penalties And Interest Accrued	10.50
Unrecognized Tax Benefits Period Increase Decrease	0.10
Significant Change In Unrecognized Tax Benefits Is Reasonably Possible Amount Of Unrecorded Benefit		$ 5.00