Business And Summary Of Significant Accounting Policies (Narrative) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended				12 Months Ended
	Jan. 31, 2014	Oct. 31, 2013	Jul. 31, 2013	Apr. 30, 2013	Jan. 31, 2014	Jan. 31, 2013	Jan. 31, 2012
Business And Summary Of Significant Accounting Policies [Line Items]
Restatement-related expenses	$ 24.8	$ 15.0	$ 11.0	$ 3.0	$ 53.8
Book overdrafts	1.0				1.0	6.0
Accounts receivable sold	263.7				263.7	284.7
Discount fees on sale of accounts receivable					3.4	2.6	1.1
Intangible assets, useful life, minimum, years					7 years	7 years	6 years
Product warranty period					2 years
Value added tax payable	233.9				233.9	236.0
Accumulated other comprehensive income, tax portion	23.0				23.0	23.0	23.0
Litigation Settlement, Amount					35.5
Capitalized software and development costs
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					6 years	8 years	6 years
Personal Computer Related Software
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					3 years
Mainframe Software Licenses
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					5 years
Maximum
Business And Summary Of Significant Accounting Policies [Line Items]
Revenue from configured product, percentage of net sales					10.00%	10.00%	10.00%
Product warranty charges, percentage of net sales							10.00%
Maximum | Capitalized software and development costs
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					10 years
Maximum | Strategic Applications
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					10 years
Minimum | Capitalized software and development costs
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					3 years
Minimum | Strategic Applications
Business And Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life, minimum, years					7 years
Hewlett-Packard | Supplier Concentration Risk | Sales Revenue, Goods, Net
Business And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage					21.00%	21.00%	25.00%
Apple | Supplier Concentration Risk | Sales Revenue, Goods, Net
Business And Summary Of Significant Accounting Policies [Line Items]
Concentration risk, percentage					13.00%	12.00%
SPAIN | Accrued Expenses and Other Liabilities
Business And Summary Of Significant Accounting Policies [Line Items]
Value added tax payable	56.4				56.4
Number of subsidiaries	1				1
Europe
Business And Summary Of Significant Accounting Policies [Line Items]
Restatement-related expenses					40.6
Europe | Accrued Expenses and Other Liabilities
Business And Summary Of Significant Accounting Policies [Line Items]
Value added tax payable	56.4				56.4	55.6
Europe | Prepaid Expenses and Other Assets
Business And Summary Of Significant Accounting Policies [Line Items]
Value added tax receivable	$ 100.0				$ 100.0	$ 90.9