Earnings Per Share - Components of Basic and Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended
	Apr. 01, 2022	Apr. 02, 2021
Numerator:
Income from continuing operations, net of tax	$ 70.4	$ 61.8
Income from discontinued operations, net of tax (refer to Note 2)	4.5	9.9
Net income	$ 74.9	$ 71.7
Denominator:
Weighted-average common shares outstanding used in basic earnings per share (in shares)	162.2	160.5
Assumed exercise of dilutive options and vesting of dilutive restricted stock units (in shares)	4.2	4.4
Assumed conversion of the Notes (in shares)	13.4	11.0
Weighted average common shares outstanding used in diluted earnings (loss) per share (in shares)	179.8	175.9
Earnings per share:
Earnings from continuing operations - basic (in USD per share)	$ 0.43	$ 0.39
Earnings from continuing operations - diluted (in USD per share)	0.39	0.35
Earnings from discontinued operations - basic (in USD per share)	0.03	0.06
Earnings from discontinued operations - diluted (in USD per share)	0.03	0.06
Earnings - basic (in USD per share)	0.46	0.45
Earnings - diluted (in USD per share)	$ 0.42	$ 0.41