Stock Based Compensation - Additional Information (Detail) (USD $)	4 Months Ended
Apr. 20, 2013	Dec. 29, 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Aggregate number of shares that may be issued or transferred under EPIP	27,937,500
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	$ 7,700,000
Expected weighted-average period to recognize compensation cost (years)	1 year 7 months 6 days
Vesting period	1 year 6 months
Dividends paid on vested performance-contingent restricted stock awards	386,000
Other long-term liabilities	50,673,000	48,891,000
Return On Invested Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout	0.00%
Return On Invested Capital \| Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC	1.75%
Return On Invested Capital \| Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC	3.75%
Return On Invested Capital \| Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC	4.75%
TSR Rank Less Than 50th Percentile Of S&P TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of change in grant	20.00%
Percentage of change in grant	(1.30%)
TSR Rank Greater Than 50th Percentile Of S&P TSR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Maximum percentage of change in grant	20.00%
Percentage of change in grant	1.30%
Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return on investment target over the two fiscal years immediately preceding the vesting date	1.75%
Percentage of shares that can be earned	0.00%
Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Return on investment target over the two fiscal years immediately preceding the vesting date	4.75%
Percentage of shares that can be earned	125.00%
Weighted Average Cost of Capital
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout	1.75%
Weighted Average Cost of Capital \| Range One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC	50.00%
Weighted Average Cost of Capital \| Range Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC	100.00%
Weighted Average Cost of Capital \| Range Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout, ROIC above WACC	125.00%
2012 awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of ROI target	125.00%
2013 awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of ROI target	100.00%
Performance Contingent Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	15,000,000
Vesting period	2 years
Return on investment target over the two fiscal years immediately preceding the vesting date	3.75%
Dividends paid on vested performance-contingent restricted stock awards	400,000
Award vesting tax windfall	2,100,000
Total fair value of shares vested	10,600,000
Total share holder return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected weighted-average period to recognize compensation cost (years)	1 year 7 months 10 days
Additional common shares issued	63,233
Deferred Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Aggregate shares converted	24,100
Deferred Stock \| Non Employee Directors
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Aggregate shares converted	47,800
Deferred Stock \| Retainer Conversion
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred shares exercised	24,060
Deferred Stock \| Annual Grant Awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Deferred shares exercised	0
Deferred Stock \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Deferred Stock Activity
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	700,000
Deferred shares exercised	24,000
Stock Appreciation Rights
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	1 year
Exercisable period	9 years
Other long-term liabilities	2,900,000	1,700,000
Dividend yield	2.70%
Expected volatility	28.00%
Risk-free interest	0.24%
Stock Appreciation Rights \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of rights	$ 19.33
Expected life	4 months 6 days
Stock Appreciation Rights \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of rights	$ 24.60
Expected life	1 year 6 months 18 days
Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	1,300,000
Expected weighted-average period to recognize compensation cost (years)	9 months 18 days
Total Shareholders Return
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based payment award, fair value assumptions, method used	Inputs into the model included the following for the company and comparator companies (i) total stockholder return from the beginning of the performance cycle through the measurement date; (ii) volatility; (iii) risk-free interest rates; and (iv) the correlation of the comparator companies' total stockholder return. The inputs are based on historical capital market data.
Performance Contingent Total Shareholder Return Shares \| Performance contingent Awards 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	17 months
Performance Contingent Total Shareholder Return Shares \| Performance contingent Awards 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Performance Contingent Return On Invested Capital Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Unrecognized compensation cost related to nonvested restricted stock granted by the EPIP	$ 7,300,000
Expected weighted-average period to recognize compensation cost (years)	1 year 7 months 6 days
Vesting period	1 year 6 months

Percentage Of Average Return On Invested Capital On Share Based Compensation Arrangement

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Percentage Of Change In Grants For Each Percentile

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Percentage Of Target Incentive Required Payout

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Performance Share Payout

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Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vesting Period One

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Provides the fair value at the reporting date of the SAR awards.

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Share Based Compensation Arrangement by Share Based Payment Award Maximum Exercisable Period for Stock Options

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Tax benefit associated with any equity-based compensation plan other than an employee stock ownership plan (ESOP). The tax benefit results from the deduction by the entity on its tax return for an award of stock that exceeds the cumulative compensation cost for common stock or preferred stock recognized for financial reporting. Includes any resulting tax benefit that exceeds the previously recognized deferred tax asset (excess tax benefits).

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Equity impact of aggregate cash, stock, and paid-in-kind dividends declared by an entity during the period and applicable to holders of share-based compensation, such as non-vested shares, stock options, or restricted stock units. This element includes paid and unpaid dividends declared during the period.

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As of the balance sheet date, the aggregate unrecognized cost of equity-based awards made to employees under equity-based compensation awards that have yet to vest.

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Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Aggregate carrying amount, as of the balance sheet date, of noncurrent obligations not separately disclosed in the balance sheet. Noncurrent liabilities are expected to be paid after one year (or the normal operating cycle, if longer).

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Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The total fair value of equity-based awards for which the grantee gained the right during the reporting period, by satisfying service and performance requirements, to receive or retain shares or units, other instruments, or cash in accordance with the terms of the arrangement.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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Expected term of share-based compensation awards, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

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For each plan, identification of the award pricing model or other valuation method used in calculating the weighted average fair values disclosed. The model is also used to calculate the compensation expense that is shown within the balance sheet, income statement, and cash flow. Examples of valuation techniques are lattice models (binomial model), closed-form models (Black-Scholes-Merton formula), and a Monte Carlo simulation technique. Fair value is the amount at which an asset or liability could be bought or incurred or sold or settled in a current transaction between willing parties, that is, other than in a forced or liquidation sale. May include disclosures about the assumptions underlying application of the method selected.

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The risk-free interest rate assumption that is used in valuing an option on its own shares.

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Number of non-option equity instruments exercised by participants.

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The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

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Other than shares newly issued, the number of additional shares issued (for example, a stock split) or canceled (for example, to correct a share issuance), during the period under the plan.

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Number of share instruments newly issued under a share-based compensation plan.

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