Income Taxes (Narrative) (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jul. 03, 2020	Jun. 28, 2019	Jul. 03, 2020	Jun. 28, 2019	Jan. 03, 2020
Income Tax Contingency [Line Items]
Effective income tax rate	30.50%	18.00%	26.50%	17.60%
Other noncurrent liabilities
Income Tax Contingency [Line Items]
Unrecognized tax benefits that would impact effective tax rate	$ 61.1		$ 61.1		$ 59.5
Unrecognized tax benefit liabilities include interest and penalties	$ 12.8		$ 12.8		$ 11.5