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Stock Compensation Plans (Weighted-Average Assumptions Used for Fair Value of Options Estimated Using Black-Scholes Option Pricing Model) (Detail) (USD $)
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12 Months Ended | ||
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Dec. 28, 2013
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Dec. 29, 2012
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Dec. 31, 2011
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| Weighted average grant date fair value of options granted | $ 12.82 | $ 9.98 | $ 10.53 |
| Expected volatility | 0.3746% | 0.3906% | 0.4078% |
| Dividend yield | 3.86% | 4.50% | 4.02% |
| Expected life of options in years | 6 years 9 months 18 days | 6 years 7 months 6 days | 6 years 6 months |
| Risk-free interest rate | 2.10% | 1.00% | 1.20% |
| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
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. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The risk-free interest rate assumption that is used in valuing an option on its own shares. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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- Definition
The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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