Leases - Schedule of Supplemental Cash Flow Information Related to Leases (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2021	Jun. 27, 2020	Jun. 30, 2021	Jun. 27, 2020
Leases [Abstract]
Change in operating lease right-of-use assets	$ 4.9	$ (1.3)	$ 15.7	$ (1.3)
Right-of-use assets obtained through acquisitions	$ 1.3		$ 1.3