Segment and Geographic Information - Reconciliation of Net Loss to Adjusted EBITDA (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 04, 2021	Jun. 28, 2020	Jul. 04, 2021	Jun. 28, 2020
Segment Reporting [Abstract]
Net loss	$ (20.0)	$ (41.3)	$ (59.1)	$ (142.5)
Interest expense, net	33.0	47.5	76.4	99.7
Provision for income taxes	15.1	3.8	18.4	7.9
Depreciation and amortization	83.1	79.9	165.8	159.7
Stock-based compensation	11.0	2.2	14.5	3.8
Restructuring and severance-related costs	1.7	2.2	3.0	4.6
Tax indemnification income, net	(0.2)	(2.4)	(0.4)	(4.9)
Loss on extinguishment of debt	0.0	2.6	50.3	12.6
Unrealized foreign currency exchanges losses, net	0.0	3.0	0.0	52.3
Other adjustments	4.5	3.4	11.6	9.7
Adjusted EBITDA	$ 128.1	$ 100.9	$ 280.6	$ 202.9