OTHER FINANCIAL INFORMATION - Other Income (Expense), Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
Other Financial Information [Abstract]
Gain (loss) on sale of equity investments	$ (0.2)	$ 0.0	$ 21.8	$ 0.0
Loss on hedges related to acquisition-related activities	0.0	(16.4)	0.0	(16.4)
Net foreign currency exchange gain (loss)	(0.5)	(0.2)	0.8	0.2
Other	0.9	1.8	0.6	1.2
Total other income (expense), net	$ 0.2	$ (14.8)	$ 23.2	$ (15.0)