Stock Compensation Plans And Capital Stock Transactions (Weighted Average Assumptions Relating To The Valuation Of Stock Options) (Details) (USD $)	12 Months Ended
Jan. 28, 2012 years	Jan. 29, 2011 years	Jan. 30, 2010 years
Stock Compensation Plans And Capital Stock Transactions [Abstract]
Weighted average fair value of grants	$ 6.49	$ 6.65	$ 3.23
Expected volatility	66.00%	66.00%	63.00%
Expected term (years)	4.5	4.5	4.5
Risk-free interest rate	1.80%	2.00%	1.90%
Expected dividend yield	1.50%	1.10%

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.

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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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