COMMITMENTS AND CONTINGENCIES - Leases (Details) - USD ($) $ in Millions	3 Months Ended
	Jan. 03, 2020	Sep. 27, 2019
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term- operating leases	7 years
Weighted average remaining lease term-finance leases	4 years 9 months 18 days
Operating lease expense	$ 7.8
Finance lease cost:
Amortization of right-of-use assets	0.1
Interest on lease liabilities	0.1
Variable lease cost	4.5
Total lease expense	12.5
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for leases	8.8
Operating leases:
Operating lease right-of-use assets	114.1
Long-term lease liabilities	93.7
Total lease liabilities	118.1
Finance leases:
Total lease liabilities	$ 13.9
Weighted average remaining discount rate-operating leases (percent)	4.80%
Weighted average remaining discount rate-finance leases (percent)	1.50%
Future Minimum Operating Lease Payments [Abstract]
Remainder of 2020	$ 21.5
2021	25.8
2022	20.3
2023	15.4
2024	11.8
Thereafter	51.4
Total minimum lease payments	146.2
Less imputed interest	28.1
Finance Lease, Liability, Payment, Due [Abstract]
Remainder of 2020	2.9
2021	3.5
2022	2.9
2023	2.9
2024	1.1
Thereafter	1.1
Total minimum lease payments	14.4
Less: imputed interest	0.5
Future Minimum Payments Due under Topic 840 [Abstract]
2020		$ 32.5
2021		26.3
2022		20.2
2023		14.5
2024		10.9
Thereafter		$ 49.9
Other Assets
Operating leases:
Operating lease right-of-use assets	114.1
Property, plant, and equipment, net
Finance leases:
Property, plant, and equipment, net	14.3
Accrued Expenses
Operating leases:
Accrued liabilities	24.4
Finance leases:
Accrued liabilities	3.4
Long-term Lease Liabilities
Operating leases:
Long-term lease liabilities	93.7
Other Long-term Liabilities
Finance leases:
Other long-term liabilities	$ 10.5
Minimum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term- operating leases	1 year
Weighted average remaining lease term-finance leases	1 year
Maximum
Lessee, Lease, Description [Line Items]
Weighted average remaining lease term- operating leases	19 years
Weighted average remaining lease term-finance leases	8 years