Inventories (Tables)

6 Months Ended

Jul. 31, 2012

Inventories [Abstract]

Inventories

(in thousands)	July 31, 2012		January 31, 2012		July 31, 2011
Finished goods	$	1,267,705	$	1,145,680	$	1,035,615
Raw materials		771,834		784,040		656,772
Work-in-process		190,935		143,492		144,487
Inventories, net	$	2,230,474	$	2,073,212	$	1,836,874