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Share Repurchase Program (Detail) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended	2 Months Ended
	Dec. 25, 2011	Feb. 14, 2012 Common Stock Repurchase Program [Member]
Accelerated Share Repurchases [Line Items]
Stock repurchased during period, shares		60,000
Stock repurchase program, authorized amount	$ 925.0
Stock repurchased during period, value		2.2
Stock repurchase program, expiration date	Dec. 31, 2012
Stock repurchase program, remaining authorized amount	$ 71.5	$ 69.3

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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- Definition

Equity impact of the value of stock that has been repurchased during the period and has not been retired and is not held in treasury. Some state laws may mandate 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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