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Taxes on Earnings - Schedule of Earnings Before Taxes (Detail) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2016
Oct. 02, 2015
Sep. 26, 2014
Income Tax Disclosure [Abstract]      
United States $ 187.0 $ 223.9 $ 173.9
Foreign 369.4 330.8 400.6
Earnings before taxes $ 556.4 $ 554.7 $ 574.5