Balance Sheet Information and Other - Lease Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Oct. 01, 2021	Oct. 02, 2020	Dec. 31, 2020
Balance Sheet Related Disclosures [Abstract]
Operating lease	$ 9.8	$ 9.9	$ 29.6	$ 28.1
Variable lease	0.9	1.3	2.9	3.1
Short-term lease	0.4	1.0	1.6	3.4
Total lease expense	11.1	$ 12.2	34.1	$ 34.6
Accrued expenses and other current liabilities	32.4		32.4		$ 32.2
Other long-term liabilities	98.3		98.3		115.7
Total lease liabilities	$ 130.7		$ 130.7		$ 147.9
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued Liabilities, Current		Accrued Liabilities, Current		Accrued Liabilities, Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Other long-term liabilities		Other long-term liabilities		Other long-term liabilities