RETIREMENT PLANS - Schedule of Net Periodic Benefit Costs (Detail) - Defined Benefit Plans - USD ($) $ in Millions	3 Months Ended
	Dec. 28, 2018	Dec. 29, 2017
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 1.8	$ 1.6
Interest cost	0.9	0.8
Expected return on plan assets	(1.6)	(2.0)
Amortization of prior service cost	(0.2)	(0.1)
Recognized actuarial loss	0.6	0.7
Net periodic benefit cost	$ 1.5	$ 1.0