Income Taxes (Tax Credit Carryforwards) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Dec. 31, 2011
Tax Credit Carryforward [Line Items]
Repatriated foreign earnings	$ 16.2
Net tax benefit from tax liabilities and credits related to foreign earnings remittances	(1.3)
Federal [Member] | Research and Development Credit [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward	1.7
State and Local Jurisdiction [Member]
Tax Credit Carryforward [Line Items]
Tax credit carryforward	$ 3.4