Leases - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Jan. 01, 2017	Sep. 29, 2019	Sep. 30, 2018
Leases [Abstract]
Expense associated with operating leases	$ 71.3	$ 79.3	$ 77.8

Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line.

No definition available.

Name:	us-gaap_LeaseAndRentalExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration