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Revenue from Contracts with Customers - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended
Jan. 04, 2020
Dec. 29, 2018
Sep. 28, 2019
Disaggregation of Revenue [Line Items]      
Deferred Revenue $ 74.8   $ 67.9
Transferred over Time [Member]      
Disaggregation of Revenue [Line Items]      
Percentage of Revenue 91.00% 89.00%