LEASES - Summary of Leases Related to Consolidated Statement of Financial Position (Details) - USD ($) $ in Millions	Jul. 04, 2021	Sep. 30, 2020
Assets
Operating	$ 118.3	$ 103.8
Finance	127.5	136.3
Total leased assets	245.8	240.1
Current
Operating	25.8	22.4
Finance	11.7	12.1
Long-term
Operating	99.7	88.8
Finance	142.2	148.4
Total lease liabilities	$ 279.4	$ 271.7
Finance Lease, Right-of-Use Asset, Statement of Financial Position	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Operating Lease, Liability, Current, Statement of Financial Position	Other current liabilities	Other current liabilities
Finance Lease, Liability, Current, Statement of Financial Position	us-gaap:DebtCurrent	us-gaap:DebtCurrent
Finance Lease, Liability, Noncurrent, Statement of Financial Position	Long-term debt, net of current portion	Long-term debt, net of current portion