Income Taxes (Narrative) (Details) (USD $)	3 Months Ended
	Dec. 29, 2012	Sep. 30, 2012	Dec. 31, 2011	Dec. 29, 2012 Servigistics, Inc [Member]	Oct. 02, 2012 Servigistics, Inc [Member]
Income Tax Disclosure [Line Items]
Effective income tax rate	(197.00%)		26.00%
Income before income taxes	$ 12,100,000		$ 29,900,000
Statutory Federal income tax rate	35.00%
Noncash charge related to Japanese legislative change and expiration of U.S. R&D tax credit		124,500,000
Deferred Tax Assets, Net		28,000,000
Identifiable intangible assets					118,300,000
Deferred tax assets and liabilities, net					35,566,000
Valuation Allowance, Deferred Tax Asset, Change in Amount				32,600,000
Unrecognized tax benefit	18,600,000		19,100,000
Income tax provision upon recognition of unrecognized tax benefit	17,900,000
Unrecognized Tax Benefits that Would Impact Effective Tax Rate, Resulting Valuation Allowance	5,800,000
Significant Change in Unrecognized Tax Benefits is Reasonably Possible, Amount of Unrecorded Benefit	$ 0