Employee Benefit Plans (Schedule Of Valuation And Expense Information) (Details)	3 Months Ended
Apr. 01, 2012	Apr. 03, 2011
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected life (in years)	4.3	4.4
Risk-free interest rate (in percentage)		1.87%
Expected volatility (in percentage)	52.50%	49.90%
Dividend yield (in percentage)	0.00%	0.00%
Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (in percentage)	0.58%
Maximum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Risk-free interest rate (in percentage)	0.91%

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

+ References+ Details

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.

+ References+ Details