COMMITMENTS AND CONTINGENCIES - Leases (Details) $ in Millions	3 Months Ended	6 Months Ended
	Apr. 03, 2020 USD ($)	Apr. 03, 2020 USD ($)
Commitments and Contingencies Disclosure [Abstract]
Operating lease cost	$ 7.6	$ 15.4
Finance lease cost:
Amortization of right-of-use assets	0.2	0.3
Interest on lease liabilities	0.2	0.3
Variable lease cost	4.2	8.7
Total lease cost	12.2	24.7
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows for leases		16.6
Operating leases:
Operating right-of-use assets	123.8	123.8
Accrued liabilities	24.4	24.4
Long-term lease liabilities	100.4	100.4
Total lease liabilities	124.8	124.8
Finance leases:
Property, plant, and equipment, net	12.8	12.8
Accrued liabilities	3.5	3.5
Other long-term liabilities	9.2	9.2
Total lease liabilities	$ 12.7	$ 12.7
Weighted average remaining lease term - operating leases	7 years 6 months	7 years 6 months
Weighted average remaining lease term - finance leases	4 years 7 months 6 days	4 years 7 months 6 days
Weighted average discount rate - operating leases (percent)	5.00%	5.00%
Weighted average discount rate - finance leases (percent)	4.00%	4.00%
Operating Leases
Remainder of 2020	$ 15.0	$ 15.0
2021	28.0	28.0
2022	22.4	22.4
2023	17.6	17.6
2024	13.3	13.3
Thereafter	63.6	63.6
Total minimum lease payments	159.9	159.9
Less: imputed interest	35.1	35.1
Finance leases
Remainder of 2020	1.8	1.8
2021	3.3	3.3
2022	2.8	2.8
2023	2.8	2.8
2024	1.1	1.1
Thereafter	2.0	2.0
Total minimum lease payments	13.8	13.8
Less: imputed interest	$ 1.1	$ 1.1