DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES - Fair Values of Derivative Instruments (Details) - USD ($) $ in Millions	Mar. 31, 2018	Sep. 30, 2017	Apr. 01, 2017
Derivatives, Fair Value [Line Items]
Total derivatives	$ 3.3	$ 5.7	$ (4.9)
Derivatives designated as hedging instruments
Derivatives, Fair Value [Line Items]
Total derivatives	2.9	3.3	(1.3)
Derivatives designated as hedging instruments | Interest rate swap agreements | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	1.5	1.3	0.7
Derivatives designated as hedging instruments | Interest rate swap agreements | Other assets
Derivatives, Fair Value [Line Items]
Derivative asset	1.9	0.0	0.8
Derivatives designated as hedging instruments | Interest rate swap agreements | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	0.0	(0.8)	(1.9)
Derivatives designated as hedging instruments | Interest rate swap agreements | Other liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	0.0	(0.4)	(0.7)
Derivatives designated as hedging instruments | Commodity hedging instruments | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	0.0	3.2	0.0
Derivatives designated as hedging instruments | Commodity hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	(0.5)	0.0	(0.2)
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total derivatives	0.4	2.4	(3.6)
Not Designated as Hedging Instrument | Currency forward contracts | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	0.3	2.0	0.5
Not Designated as Hedging Instrument | Currency forward contracts | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	(1.0)	(0.2)	(4.0)
Not Designated as Hedging Instrument | Commodity hedging instruments | Prepaid and other current assets
Derivatives, Fair Value [Line Items]
Derivative asset	1.1	0.6	0.0
Not Designated as Hedging Instrument | Commodity hedging instruments | Other current liabilities
Derivatives, Fair Value [Line Items]
Derivative liability	$ 0.0	$ 0.0	$ (0.1)