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Revenue Recognition - Deferred Income (Details)
$ in Millions
6 Months Ended
Mar. 27, 2020
USD ($)
Movement in Deferred Income [Roll Forward]  
Balance, September 27, 2019 $ 319.0
Add: Net increase in current period deferred income 682.2
Less: Recognition of deferred income (748.0)
Balance, March 27, 2020 $ 253.2