OTHER FINANCIAL INFORMATION - Other Income, Net (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Apr. 03, 2020	Mar. 29, 2019	Apr. 03, 2020	Mar. 29, 2019
Other Financial Information [Abstract]
Gain (loss) on equity investments	$ 0.0	$ (0.2)	$ 1.4	$ 21.8
Net foreign currency exchange gain (loss)	(1.4)	(0.5)	1.0	0.8
Other, net	0.5	0.9	1.1	0.6
Total other income (expense), net	$ (0.9)	$ 0.2	$ 3.5	$ 23.2