Summary of Accounting Policies - Other Accrued Liabilities (Detail) - USD ($) $ in Millions	Jan. 02, 2021	Dec. 28, 2019
Accounting Policies [Abstract]
Income taxes	$ 32.8	$ 23.9
Accrued warranty	17.6	17.3
Operating lease liability	19.3	19.5
Deferred subscription revenue	53.6	55.1
Accrued new tool return	56.3	50.9
Accrued property, payroll and other taxes	62.8	38.6
Accrued selling and promotion expense	33.2	28.3
Accrued restructuring expense	10.0	0.0
Other	159.9	137.2
Total other accrued liabilities	$ 445.5	$ 370.8
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	us-gaap:OtherLiabilitiesCurrent	us-gaap:OtherLiabilitiesCurrent