Consolidated Statements of Operations - USD ($) shares in Thousands, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 26, 2020	Sep. 28, 2019	Sep. 26, 2020	Sep. 28, 2019
Income Statement [Abstract]
Revenue, net	$ 517.5	$ 472.1	$ 1,448.5	$ 1,355.4
Cost of sales	213.4	185.8	616.4	554.4
Gross profit	304.1	286.3	832.1	801.0
Selling, general and administrative expenses	257.2	244.2	759.0	725.7
Loss on disposal of property, plant and equipment, net	2.3	1.1	6.2	4.7
Acquisition and integration expenses	3.3	2.6	28.4	10.0
Goodwill and intangible asset impairment charges	0.0	0.0	115.2	0.0
Operating income (loss)	41.3	38.4	(76.7)	60.6
Other (income) expense, net	(4.8)	3.8	0.6	7.1
Interest expense, net	20.4	20.2	60.8	58.3
Income (loss) from continuing operations before income taxes	25.7	14.4	(138.1)	(4.8)
Income tax expense (benefit)	3.4	7.1	(1.3)	7.9
Net income (loss) from continuing operations	22.3	7.3	(136.8)	(12.7)
Net (loss) income from discontinued operations, net of income taxes	(0.3)	2.8	26.3	7.5
Net income (loss)	$ 22.0	$ 10.1	$ (110.5)	$ (5.2)
Basic:
Continuing operations (in USD per share)	$ 0.14	$ 0.05	$ (0.89)	$ (0.09)
Discontinued operations (in USD per share)	0	0.02	0.17	0.05
Net income (loss) (in USD per share)	0.14	0.07	(0.72)	(0.04)
Diluted:
Continuing operations (in USD per share)	0.14	0.05	(0.89)	(0.09)
Discontinued operations (in USD per share)	0	0.02	0.17	0.05
Net income (loss) (in USD per share)	$ 0.14	$ 0.07	$ (0.72)	$ (0.04)
Weighted average common shares outstanding (in thousands)
Basic (in shares)	160,101	134,667	153,723	135,395
Diluted (in shares)	161,433	136,208	153,723	135,395