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Stock Purchase And Stock Option Plans (Total Intrinsic Value Of Options Exercised) (Details) (USD $)
12 Months Ended
Sep. 30, 2011
Oct. 01, 2010
Oct. 02, 2009
Stock Purchase And Stock Option Plans   
Intrinsic value of stock options exercised$ 34,665,000$ 11,764,000$ 15,033,000
Intrinsic value of options exercisable$ 18,000,000