COMMITMENTS AND GUARANTEES - Lease Cost (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 28, 2020	Mar. 30, 2019
Commitments and Guarantees [Abstract]
Operating lease cost	$ 37.6	$ 37.6
Short-term lease cost	6.8	6.8
Variable lease cost	2.0	2.1
Sublease income	(0.2)	(0.6)
Total lease cost	$ 46.2	$ 45.9