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Schedule of Earnings before Income Taxes and Discontinuing Operations (Detail) (USD $)
12 Months Ended
Sep. 28, 2012
Sep. 30, 2011
Oct. 01, 2010
Schedule of Income Before Income Tax [Line Items]      
United States $ 271,400,000 $ 299,300,000 $ 282,100,000
Foreign 324,500,000 289,400,000 250,800,000
Earnings from continuing operations before taxes $ 595,924,000 $ 588,710,000 $ 532,925,000