Segment Information (Financial Information By Geographic Segment) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended				9 Months Ended
	Oct. 31, 2013		Oct. 31, 2012		Oct. 31, 2013		Oct. 31, 2012		Jan. 31, 2013
Segment Reporting Information [Line Items]
Net sales	$ 6,373,564		$ 6,037,475	[1]	$ 18,848,797		$ 17,915,957	[1]
Operating Income (Loss)	63,880		63,595	[1]	129,770		206,364
Stock-based compensation expense	(1,631)		(3,545)		(6,949)		(10,152)	[1]
Depreciation and amortization	18,363		13,524		54,438		40,114	[1]
PropertyPlantandEquipmentandSoftware	6,003		8,605		20,937		31,871
Identifiable assets	6,704,585				6,704,585				6,830,960
Long-lived assets:	78,358				78,358				84,395
Goodwill and acquisition-related intangible assets, net:	392,992				392,992				412,500
Americas
Segment Reporting Information [Line Items]
Net sales	2,571,750	[2]	2,368,243	[2]	7,489,078	[2]	7,232,899	[2]
Operating Income (Loss)	53,297		32,624		112,516		112,270
Depreciation and amortization	4,067		4,079		12,564		11,900
PropertyPlantandEquipmentandSoftware	1,730		2,420		5,348		16,385
Identifiable assets	2,065,892				2,065,892				2,004,295
Long-lived assets:	26,572	[2]			26,572	[2]			30,492	[2]
Goodwill and acquisition-related intangible assets, net:	2,966				2,966				2,966
Sales to unaffiliated customers, as percentage of total sales	87.00%		85.00%		86.00%		84.00%
Long-lived assets, as percentage of total assets	90.00%				90.00%				90.00%
Europe
Segment Reporting Information [Line Items]
Net sales	3,801,814		3,669,232		11,359,719		10,683,058
Operating Income (Loss)	12,214		34,516		24,203		104,246
Depreciation and amortization	14,296		9,445		41,874		28,214
PropertyPlantandEquipmentandSoftware	4,273		6,185		15,589		15,486
Identifiable assets	4,638,693				4,638,693				4,826,665
Long-lived assets:	51,786				51,786				53,903
Goodwill and acquisition-related intangible assets, net:	$ 390,026				$ 390,026				$ 409,534

[1] See Note 2 - Restatement of Consolidated Financial Statements.

[2] Net sales to unaffiliated customers in the United States represented 87% and 85%, respectively, of the total Americas' net sales to unaffiliated customers for the fiscal quarters ended October 31, 2013 and October 31, 2012. Net sales to unaffiliated customers in the United States represented 86% and 84%, respectively, of the total Americas' net sales to unaffiliated customers for the nine months ended October 31, 2013 and October 31, 2012. Total long-lived assets in the United States represented 90% of the Americas' total long-lived assets at both October 31, 2013 and January 31, 2013.