Stock-Based Compensation (Performance-Contingent Return on Invested Capital Shares) - Additional Information (Detail) - 6 months ended Jul. 18, 2015	Total
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%
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%
Performance Contingent Return On Invested Capital Shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of actual ROI attainment	125.00%
Performance Contingent Return On Invested Capital Shares \| Performance contingent Awards 2013, 2014 and 2015
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	2 years
Performance Contingent Return On Invested Capital Shares \| Performance contingent Awards 2012
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period	18 months
Performance Contingent Return On Invested Capital Shares \| 2012 awards
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of actual ROI attainment	125.00%

Actual Percentage earned on 2012 return on invested capital award

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Range of Percentage Of Target Incentive Required Payout

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Range of payout in percentage of target shares possible to earn.

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Return On Investment Share Based Compensation Arrangement By Share Based Payment Award Performance Condition target Percentage in excess of weighted average cost of capital.

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Vesting period for return on invested capital awards issued after 2012.

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