Inventories (Tables)

6 Months Ended

Jul. 31, 2011

Inventories [Abstract]

Inventories

(in thousands)	July 31, 2011		January 31, 2011		July 31, 2010
Finished goods	$	1,035,615	$	988,085	$	978,021
Raw materials		656,772		534,879		469,804
Work-in-process		144,487		102,338		105,292
Inventories, net	$	1,836,874	$	1,625,302	$	1,553,117