STOCKHOLDERS' EQUITY - Schedule of Amounts Reclassified Out of Other Comprehensive Earnings (Detail) - USD ($) $ in Millions	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Reclassification Adjustment Out Of Accumulated Comprehensive Income [Line Items]
Revenues	$ 828.9	$ 741.0
Operating earnings	110.0	111.7
Unrealized loss on defined benefit pension and post-retirement benefit plans
Reclassification Adjustment Out Of Accumulated Comprehensive Income [Line Items]
Other income, net	(0.9)	(0.4)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment Out Of Accumulated Comprehensive Income [Line Items]
Operating earnings	(0.1)	(0.4)
Reclassification out of Accumulated Other Comprehensive Income | Unrealized earnings on cash flow hedging instruments
Reclassification Adjustment Out Of Accumulated Comprehensive Income [Line Items]
Revenues	$ 0.8	$ 0.0