STOCKHOLDERS' EQUITY - Schedule of Accumulated Other Comprehensive Earnings (Loss) and Related Tax Effects (Detail) - USD ($) $ in Millions	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	$ 1,777.6	$ 1,588.7
Balance at end of period	1,857.3	1,682.0
Net Unrealized Gains (Losses) Defined Benefit Pension and Post-Retirement Benefit Plans
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(61.7)	(35.2)
Other comprehensive earnings (loss) before reclassifications	0.0	0.0
Amounts reclassified out of other comprehensive earnings (loss)	0.9	0.4
Tax (expense) benefit	(0.2)	(0.1)
Balance at end of period	(61.0)	(34.9)
Net Unrealized Gains Cash Flow Hedging Instruments
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	2.1
Other comprehensive earnings (loss) before reclassifications	(0.1)
Amounts reclassified out of other comprehensive earnings (loss)	(0.8)
Tax (expense) benefit	0.2
Balance at end of period	1.4
Cumulative Translation Adjustment
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(42.5)	(30.1)
Other comprehensive earnings (loss) before reclassifications	5.1	(4.0)
Amounts reclassified out of other comprehensive earnings (loss)	0.0	0.0
Tax (expense) benefit	0.0	0.0
Balance at end of period	(37.4)	(34.1)
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward]
Balance at beginning of period	(102.1)	(65.3)
Other comprehensive earnings (loss) before reclassifications	5.0	(4.0)
Amounts reclassified out of other comprehensive earnings (loss)	0.1	0.4
Tax (expense) benefit	0.0	(0.1)
Balance at end of period	$ (97.0)	$ (69.0)