Shares Held for Deferred Compensation Plans (Detail) - USD ($) $ in Millions	Jul. 04, 2015	Jan. 03, 2015	Jun. 28, 2014
Schedule of Deferred Compensation Plans [Line Items]
Shares held for deferred compensation plans	565,549	637,504	695,204
Cost of shares held for deferred compensation plans	$ 6.7	$ 7.7	$ 8.2

Number of common stock held in a trust that has been set up specifically to accumulate stock for the sole purpose of distribution to participating employees but not yet earned.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 40

-Section 25

-Paragraph 12

-URI http://asc.fasb.org/extlink&oid=6418455&loc=d3e16701-113920

Name:	us-gaap_CommonStockSharesHeldInEmployeeTrustShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant