Accounting Policies (Details)	6 Months Ended
	Jul. 30, 2011
Accounting Policies
Value of Canadian dollar equivalent to $1.00, low end of range	0.94
Value of Canadian dollar equivalent to $1.00, high end of range	1.00
Average value of Canadian dollar equivalent to $1.00	0.97
Value of Canadian dollar equivalent to $1.00	0.96