Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2021	Jun. 27, 2020	Jul. 03, 2021	Jun. 27, 2020
Income Statement [Abstract]
Revenue, net	$ 526.1	$ 456.8	$ 1,004.5	$ 931.0
Cost of sales	228.9	202.1	442.8	403.0
Gross profit	297.2	254.7	561.7	528.0
Selling, general and administrative expenses	259.9	246.7	507.9	501.8
Loss on disposal of property, plant and equipment, net	3.3	2.5	5.4	3.9
Acquisition and integration expenses	2.4	4.3	3.7	25.1
Goodwill and intangible asset impairment charges	0.0	115.2	0.0	115.2
Operating income (loss)	31.6	(114.0)	44.7	(118.0)
Other expense (income), net	25.6	(1.6)	25.2	5.4
Interest expense, net	17.7	20.7	36.7	40.4
Loss from continuing operations before income taxes	(11.7)	(133.1)	(17.2)	(163.8)
Income tax (benefit) expense	(3.4)	(1.4)	1.3	(4.7)
Net loss from continuing operations	(8.3)	(131.7)	(18.5)	(159.1)
Net (loss) income from discontinued operations, net of income taxes	0.0	(4.3)	0.0	26.6
Net loss	$ (8.3)	$ (136.0)	$ (18.5)	$ (132.5)
Basic:
Continuing operations (in USD per share)	$ (0.05)	$ (0.82)	$ (0.11)	$ (1.06)
Discontinued operations (in USD per share)	0	(0.03)	0	0.18
Net loss (in USD per share)	(0.05)	(0.85)	(0.11)	(0.88)
Diluted:
Continuing operations (in USD per share)	(0.05)	(0.82)	(0.11)	(1.06)
Discontinued operations (in USD per share)	0	(0.03)	0	0.18
Net loss (in USD per share)	$ (0.05)	$ (0.85)	$ (0.11)	$ (0.88)
Weighted average common shares outstanding (in thousands)
Basic (in shares)	161,561	159,931	161,097	150,535
Diluted (in shares)	161,561	159,931	161,097	150,535