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Other Intangible Assets and Related Accumulated Amortization (Details) - USD ($) $ in Millions | Apr. 30, 2017 | Jan. 31, 2017
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Finite-Lived Intangible Assets [Line Items] |  |  |
Other intangible assets, at cost | [1] | $ 961.9 | $ 959.5
Less: Accumulated amortization |  | (874.3) | (862.0)
Other intangible assets, net |  | 87.6 | 97.5
Developed technologies, at cost |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Other intangible assets, at cost |  | 584.3 | 583.6
Customer relationships, trade names, patents, and user lists, at cost |  |  |
Finite-Lived Intangible Assets [Line Items] |  |  |
Other intangible assets, at cost | [2] | $ 377.6 | $ 375.9
[1] | Includes the effects of foreign currency translation.
[2] | Included in “Other assets” in the accompanying Condensed Consolidated Balance Sheets.

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- Definition Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References 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=66006027&loc=d3e16323-109275 + Details
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- Definition Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life. + References 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=66006027&loc=d3e16323-109275 + Details
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