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Shareholders' Equity (Narrative) (Detail) (USD $) In Millions, except Share data, unless otherwise specified	1 Months Ended	6 Months Ended
	Oct. 31, 2011	Jun. 28, 2013	Jun. 29, 2012
Stockholders Equity [Line Items]
Stock repurchase program approved amount	$ 100.0
Stock repurchased during period, shares		0	0
Restricted Stock Units (RSUs) [Member]
Stockholders Equity [Line Items]
Restricted Stock Unit Award Vesting Period		3 years

Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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