Goodwill And Intangible Assets (Schedule Of Intangible Assets) (Details) (USD $) In Thousands, unless otherwise specified	Jan. 31, 2015	Jan. 31, 2014
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	$ 529,247	$ 583,746
Accumulated amortization	352,493	345,843
Net book value	176,754us-gaap_FiniteLivedIntangibleAssetsNet	237,903us-gaap_FiniteLivedIntangibleAssetsNet
Capitalized software and development costs
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	307,759	328,456
Accumulated amortization	250,987	255,946
Net book value	56,772	72,510
Customer and Vendor Relationship
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	180,659	209,685
Accumulated amortization	82,512	74,461
Net book value	98,147	135,224
Preferred Supplier Agreement
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	28,276	32,120
Accumulated amortization	11,032	7,622
Net book value	17,244	24,498
Other intangible assets
Finite-Lived Intangible Assets [Line Items]
Gross carrying amount	12,553	13,485
Accumulated amortization	7,962	7,814
Net book value	$ 4,591	$ 5,671

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

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