Other Financial Information - Components of Prepaid Expenses and Other Current Assets (Details) - USD ($) $ in Millions	Oct. 02, 2020	Sep. 27, 2019
Prepaid and Other Current Assets [Line Items]
Prepaid income taxes	$ 50.0	$ 51.1
Prepaid sales taxes	16.9	21.0
Prepaid compensation	16.1	13.7
Advance payments to suppliers	13.8	15.3
Equity investments	34.4	0.0
CPTC Term loan	11.8	5.3
Other current receivables	49.2	41.9
Other prepaid expenses	62.6	57.9
Total prepaid expenses and other current assets	$ 254.8	$ 206.2