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Income Taxes - Income Tax Benefits Realized from the Exercise of Nonqualified Stock Options, and Disqualifying Dispositions of Stock Sold Under our Employee Stock Purchase Plans (Details) - USD ($)
$ in Millions
12 Months Ended
Sep. 30, 2022
Oct. 01, 2021
Oct. 02, 2020
Income Tax Disclosure [Abstract]      
Income tax benefits realized under stock plans $ 2.2 $ 9.9 $ 10.2