Income Taxes (Narrative) (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jul. 04, 2014	Jun. 28, 2013	Jul. 04, 2014	Jun. 28, 2013	Jan. 03, 2014
Income Tax Contingency [Line Items]
Effective income tax rate	21.00%	20.00%	22.00%	16.00%
Unrecognized tax benefit liabilities include interest and penalties	$ 4.5		$ 4.5		$ 3.6
Statutory federal income tax rate	35.00%			35.00%
Unrecognized tax benefits that would impact effective tax rate	$ 42.1		$ 42.1		$ 38.1