Retirement plans Weighted-average assumptions used to determine net cost and benefit obligations (Tables)

12 Months Ended

Jan. 31, 2013

Weighted-average assumptions [Abstract]

Weighted-average assumptions used to determine net cost and benefit obligations [Table Text Block]

Weighted-average assumptions used to determine net cost and benefit obligations	2012		2011
End of year benefit obligation	4.00	%	4.25	%
Service cost discount rate	4.25	%	5.78	%
Expected return on plan assets	8.00	%	8.00	%
Rate of compensation increase	N/A		N/A