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Stock-Based Compensation (Schedule Of Fair Values Of Company's Stock Option Awards) (Details) (Employee Stock Purchase Plan [Member])	3 Months Ended
	Mar. 29, 2014	Mar. 30, 2013
Employee Stock Purchase Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (years)	6 months	6 months
Expected volatility	33.00%	37.00%
Risk-free interest rate	0.10%	0.10%

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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