Condensed Consolidated Statements of Operations (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended			9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020		Oct. 01, 2021		Oct. 02, 2020
Income Statement [Abstract]
Sales	$ 607.3	$ 547.2		$ 1,857.1		$ 1,312.8
Cost of sales	251.0	238.8		773.8		598.0
Gross profit	356.3	308.4		1,083.3		714.8
Operating expenses:
Selling, general and administrative	250.6	226.8		747.5		681.3
Research and development	24.0	20.0		75.7		63.5
Operating profit (loss)	81.7	61.6		260.1		(30.0)
Nonoperating income (expense):
Other income	0.2	0.2		0.8		0.4
Interest expense, net	(12.0)	(23.4)		(43.6)		(41.2)
Income (loss) before income taxes	69.9	38.4		217.3		(70.8)
Income tax (benefit) expense	(10.3)	14.8		(3.7)		(22.2)
Income (loss) from continuing operations	80.2	23.6		221.0		(48.6)
Income (loss) from discontinued operations, net of tax (refer to Note 3)	12.7	12.0		33.7		(26.5)
Net income (loss)	$ 92.9	$ 35.6		$ 254.7		$ (75.1)
Earnings (loss) per share:
Earnings (loss) from continuing operations - basic (in USD per share)	$ 0.50	$ 0.15		$ 1.37		$ (0.30)
Earnings (loss) from continuing operations - diluted (in USD per share)	0.45	0.14		1.25		(0.30)
Earnings (loss) from discontinued operations - basic (in USD per share)	0.08	0.08		0.21		(0.17)
Earnings (loss) from discontinued operations - diluted (in USD per share)	0.07	0.07		0.19		(0.17)
Earnings (loss) - basic (in USD per share)	0.58	0.22	[1]	1.58		(0.47)
Earnings (loss) - diluted (in USD per share)	$ 0.52	$ 0.22	[1]	$ 1.43	[1]	$ (0.47)
Average common stock and common equivalent shares outstanding:
Basic (in shares)	161.5	159.7		161.1		159.4
Diluted (in shares)	178.1	163.9		177.5		159.4

[1] * Earnings (loss) per share is computed independently for earnings (loss) per share from continuing operations and earnings (loss) per share from discontinued operations. The sum of earnings (loss) per share from continuing operations and earnings (loss) per share from discontinued operations does not equal earnings (loss) per share due to rounding.