Segment Information (Financial Information By Geographic Segment) (Details) (USD $)	3 Months Ended														12 Months Ended
	Jan. 31, 2014		Oct. 31, 2013		Jul. 31, 2013		Apr. 30, 2013		Jan. 31, 2013		Oct. 31, 2012	Jul. 31, 2012	Apr. 30, 2012	Jan. 31, 2012	Jan. 31, 2014		Jan. 31, 2013		Jan. 31, 2012
Segment Reporting Information [Line Items]
Net sales	$ 7,973,107,000	[1],[2],[3]	$ 6,373,564,000	[1],[2]	$ 6,327,476,000	[1]	$ 6,147,757,000	[1]	$ 7,442,372,000	[4],[5]	$ 6,037,475,000	$ 5,968,419,000	$ 5,910,063,000		$ 26,821,904,000		$ 25,358,329,000		$ 25,647,313,000
Stock-based compensation expense															(8,858,000)		(13,616,000)		(11,994,000)
Operating income	97,743,000	[1],[2],[3]	63,880,000	[1],[2]	29,859,000	[1]	36,031,000	[1]	57,356,000	[4],[5]	63,595,000	60,311,000	82,458,000		227,513,000		263,720,000		304,546,000
Depreciation and amortization															72,979,000		58,353,000		57,332,000
Capital expenditures															28,869,000		38,365,000		44,559,000
Identifiable assets	7,169,666,000								6,830,960,000						7,169,666,000		6,830,960,000
Long-lived assets	77,631,000								84,395,000						77,631,000		84,395,000
Goodwill and acquisition-related intangible assets, net	395,855,000								412,500,000						395,855,000		412,500,000
Gain associated with legal settlement	12,600,000		22,900,000
Restatement-related expenses	24,800,000		15,000,000		11,000,000		3,000,000								53,800,000
Loss on disposal of subsidiaries														28,300,000	0		0		(28,294,000)
Value added tax assessment															0		29,462,000		0
Americas
Segment Reporting Information [Line Items]
Net sales															10,188,618,000	[6]	9,823,515,000	[6]	10,405,428,000	[6]
Operating income															156,143,000	[7],[8]	150,055,000	[7],[8]	173,978,000	[7],[8]
Depreciation and amortization															16,763,000		16,210,000		16,338,000
Capital expenditures															9,530,000		19,842,000		29,240,000
Identifiable assets	1,984,895,000								2,004,295,000						1,984,895,000		2,004,295,000
Long-lived assets	28,091,000	[6]							30,492,000	[6]					28,091,000	[6]	30,492,000	[6]
Goodwill and acquisition-related intangible assets, net	8,936,000								2,966,000						8,936,000		2,966,000
Gain associated with legal settlement															35,500,000
Restatement-related expenses															13,200,000
Loss on disposal of subsidiaries														28,300,000
Americas | Geographic Concentration Risk | UNITED STATES | Sales Revenue, Segment
Segment Reporting Information [Line Items]
Concentration risk, percentage															86.00%		85.00%		83.00%
Americas | Geographic Concentration Risk | UNITED STATES | Assets, Total
Segment Reporting Information [Line Items]
Concentration risk, percentage															90.00%		90.00%
Europe
Segment Reporting Information [Line Items]
Net sales															16,633,286,000		15,534,814,000		15,241,885,000
Operating income															80,228,000	[10],[9]	127,281,000	[10],[9]	142,562,000	[10],[9]
Depreciation and amortization															56,216,000		42,143,000		40,994,000
Capital expenditures															19,339,000		18,523,000		15,319,000
Identifiable assets	5,184,771,000								4,826,665,000						5,184,771,000		4,826,665,000
Long-lived assets	49,540,000								53,903,000						49,540,000		53,903,000
Goodwill and acquisition-related intangible assets, net	386,919,000								409,534,000						386,919,000		409,534,000
Restatement-related expenses															40,600,000
Value added tax assessment																	$ 29,500,000

[1] During the first, second, third and fourth quarters of fiscal 2014, the Company recorded $3.0 million, $11.0 million, $15.0 million and $24.8 million of restatement-related expenses, respectively (see further discussion in Note 1 - Business and Summary of Significant Accounting Policies).

[2] During the third and fourth quarters of fiscal 2014, the Company recorded gains of $22.9 million and $12.6 million, respectively, associated with legal settlements (see further discussion in Note 1 - Business and Summary of Significant Accounting Policies).

[3] During the fourth quarter of fiscal 2014, the Company recorded a $45.3 million reversal of deferred tax valuation allowances primarily related to certain jurisdictions in Europe (see further discussion in Note 8 - Income Taxes).

[4] During the fourth quarter of fiscal 2013, the Company recorded a $41.0 million increase in an accrual for various VAT matters in one of the Company’s subsidiaries in Spain (see further discussion in Note 13 - Commitments and Contingencies).

[5] During the fourth quarter of fiscal 2013, the Company recorded an income tax benefit of $25.1 million for the reversal of deferred tax valuation allowances related to a specific jurisdiction in Europe (see further discussion in Note 8 - Income Taxes).

[6] Net sales to unaffiliated customers in the United States represented 86%, 85% and 83%, respectively, of the total Americas' net sales to unaffiliated customers for the fiscal years ended January 31, 2014, 2013 and 2012, respectively. Total long-lived assets excluding goodwill, intangible assets and investments in subsidiaries in the United States represented 90% of the Americas' total long-lived assets at both January 31, 2014 and 2013.

[7] During fiscal 2012, the Company incurred a $28.3 million loss on disposal of subsidiaries related to the closure of the operations in Brazil and Colombia (see further discussion in Note 6 - Loss on Disposal of Subsidiaries).

[8] Operating income in the Americas for the fiscal year ended January 31, 2014 includes a gain associated with legal settlements of $35.5 million and restatement-related expenses of $13.2 million. See Note 1 - Business and Summary of Significant Accounting Policies.

[9] Operating income in Europe for the fiscal year ended January 31, 2014 includes $40.6 million of restatement-related expenses.

[10] Operating income in Europe for the fiscal year ended January 31, 2013 includes a VAT assessment of $29.5 million in relation to an assessment and penalties for various VAT matters in one of the Company’s subsidiaries in Spain (see further discussion in Note 13 - Commitments and Contingencies).