Employee Share-Based Compensation (Details) (Options [Member])	3 Months Ended
Mar. 30, 2013
Options [Member]
Volatility	32.64%
Expected dividends	0.00%
Expected term	6 years 1 month 6 days
Risk-free rate	1.13%

- 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.

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