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Employee Benefit Plans (Schedule Of Valuation And Expense Information) (Details)	3 Months Ended		6 Months Ended
	Jul. 01, 2012	Jul. 03, 2011	Jul. 01, 2012	Jul. 03, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in days)	1606 days	1606 days	1606 days	1606 days
Risk-free interest rate (in percentage)		1.73%		1.80%
Expected volatility (in percentage)	52.10%	50.00%	52.10%	50.00%
Dividend yield (in percentage)	0.00%	0.00%	0.00%	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (in percentage)	0.62%		0.58%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (in percentage)	0.71%		0.91%

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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