Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Operating Loss Carryforwards [Line Items]
Valuation allowance on NOL and capital loss carryforwards	$ 0.4
Income tax adjustment, expense reduction	5.3
Undistributed foreign earnings	142.2
Unrecognized tax benefits including accrued interest and penalties	26.9	17.2
Accrued interest and penalties	5.9	4.7
Unrecognized tax benefits	3.7
Domestic Country [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	16.1
Research and development tax credit carryforwards	1.7	6.5
State and Local Jurisdiction [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	48.2	51.4
Foreign Country [Member]
Operating Loss Carryforwards [Line Items]
Operating loss carryforwards	1.0	0.7
Research and development tax credit carryforwards		$ 4.3