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Basic and Diluted Earnings per Common Share (Detail) (USD $) In Thousands, except Per Share data, unless otherwise specified	4 Months Ended
	Apr. 25, 2015	Apr. 19, 2014
Earnings Per Share [Abstract]
Net income	$ 61,389us-gaap_NetIncomeLoss	$ 61,066us-gaap_NetIncomeLoss
Basic weighted average shares outstanding for common stock	209,913us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	209,131us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Basic earnings per common share	$ 0.29us-gaap_EarningsPerShareBasic	$ 0.29us-gaap_EarningsPerShareBasic
Basic weighted average shares outstanding for common stock	209,913us-gaap_WeightedAverageNumberOfSharesOutstandingBasic	209,131us-gaap_WeightedAverageNumberOfSharesOutstandingBasic
Add: Shares of common stock assumed issued upon exercise of stock options, vesting of performance-contingent restricted stock, and deferred stock	2,805us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	3,675us-gaap_IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
Diluted weighted average shares outstanding for common stock	212,718us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding	212,806us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding
Diluted earnings per common share	$ 0.29us-gaap_EarningsPerShareDiluted	$ 0.29us-gaap_EarningsPerShareDiluted

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The amount of net income (loss) for the period per each share of common stock or unit outstanding during the reporting period.

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The amount of net income (loss) for the period available to each share of common stock or common unit outstanding during the reporting period and to each share or unit that would have been outstanding assuming the issuance of common shares or units for all dilutive potential common shares or units outstanding during the reporting period.

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Additional shares included in the calculation of diluted EPS as a result of the potentially dilutive effect of share based payment arrangements using the treasury stock method.

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