RETIREMENT PLANS - Schedule of Net Periodic Benefit Costs (Detail) - Defined Benefit Plans - USD ($) $ in Millions	3 Months Ended
	Jan. 03, 2020	Dec. 28, 2018
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2.5	$ 1.8
Interest cost	0.5	0.9
Expected return on plan assets	(1.9)	(1.6)
Amortization of prior service cost	(0.2)	(0.2)
Recognized actuarial loss	1.1	0.6
Net periodic benefit cost	$ 2.0	$ 1.5