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Segments Information Regarding Operations by Geographic Area (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Apr. 30, 2015 | Apr. 30, 2014
Segment Reporting Information [Line Items] |  |
Net revenue | $ 646.5 us-gaap_SalesRevenueNet | $ 592.5 us-gaap_SalesRevenueNet
Other Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 92.0 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = adsk_OtherAsiaPacificMember | 74.7 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = adsk_OtherAsiaPacificMember
Americas |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 244.0 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 205.7 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Americas | U.S. |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 199.6 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = country_US / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 169.5 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = country_US / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Americas | Other Americas |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 44.4 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = adsk_OtherAmericasMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember | 36.2 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = adsk_OtherAmericasMember / us-gaap_StatementGeographicalAxis = us-gaap_AmericasMember
Europe, Middle East and Africa |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 245.4 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember | 225.5 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_EMEAMember
Asia Pacific |  |
Segment Reporting Information [Line Items] |  |
Net revenue | 157.1 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | 161.3 us-gaap_SalesRevenueNet / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember
Asia Pacific | Japan |  |
Segment Reporting Information [Line Items] |  |
Net revenue | $ 65.1 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = country_JP / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember | $ 86.6 us-gaap_SalesRevenueNet / adsk_RegionReportingInformationBySecondaryRegionAxis = country_JP / us-gaap_StatementGeographicalAxis = us-gaap_AsiaPacificMember

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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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