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Basis Of Presentation And Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Mar. 31, 2012 M	Oct. 01, 2011
Basis Of Presentation And Accounting Policies [Abstract]
Liquid investments, maximum maturity period, months	3
Fair value of long-term debt	$ 267.6	$ 274.3
Carrying value of long-term debt	$ 265.0	$ 272.5

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date. May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer, and after deducting unamortized discount or premiums, if any.

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