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Segments Concerning the Operations Of Reportable Segments (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
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Apr. 30, 2015 segment | Apr. 30, 2014
Segment Reporting Information [Line Items] |  |  |  |
Number of reportable segments | 4 us-gaap_NumberOfReportableSegments |  |  |
Net revenue | $ 646.5 us-gaap_SalesRevenueNet |  | $ 592.5 us-gaap_SalesRevenueNet |
Gross profit | 554.7 us-gaap_GrossProfit |  | 513.8 us-gaap_GrossProfit |
Unallocated |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Gross profit | (16.4)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | [1] | (14.5)us-gaap_GrossProfit / us-gaap_ConsolidationItemsAxis = us-gaap_MaterialReconcilingItemsMember | [1]
Architecture, Engineering and Construction |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenue | 236.7 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_ArchitectureEngineeringAndConstructionMember |  | 195.5 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_ArchitectureEngineeringAndConstructionMember |
Gross profit | 217.0 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_ArchitectureEngineeringAndConstructionMember |  | 175.6 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_ArchitectureEngineeringAndConstructionMember |
Platform Solutions and Emerging Business |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenue | 185.3 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_PlatformSolutionsAndEmergingBusinessMember |  | 211.9 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_PlatformSolutionsAndEmergingBusinessMember |
Gross profit | 163.3 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_PlatformSolutionsAndEmergingBusinessMember |  | 191.0 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_PlatformSolutionsAndEmergingBusinessMember |
Manufacturing |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenue | 184.6 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_ManufacturingMember |  | 147.3 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_ManufacturingMember |
Gross profit | 158.1 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_ManufacturingMember |  | 132.7 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_ManufacturingMember |
Media and Entertainment |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Number of product groups | 2 adsk_NumberofProductGroups / us-gaap_StatementBusinessSegmentsAxis = adsk_MediaAndEntertainmentMember |  |  |
Net revenue | 39.9 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_MediaAndEntertainmentMember |  | 37.8 us-gaap_SalesRevenueNet / us-gaap_StatementBusinessSegmentsAxis = adsk_MediaAndEntertainmentMember |
Gross profit | $ 32.7 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_MediaAndEntertainmentMember |  | $ 29.0 us-gaap_GrossProfit / us-gaap_StatementBusinessSegmentsAxis = adsk_MediaAndEntertainmentMember |
[1] | Unallocated amounts primarily relate to corporate expenses and other costs and expenses that are managed outside the reportable segments, including stock-based compensation expense.

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- Definition Number of Product Groups + References No definition available. + Details
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Namespace Prefix: | adsk_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Aggregate revenue less cost of goods and services sold or operating expenses directly attributable to the revenue generation activity. + 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 210.5-03.1,2) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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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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Namespace Prefix: | us-gaap_
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Balance Type: | credit
Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=adsk_ArchitectureEngineeringAndConstructionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=adsk_MediaAndEntertainmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=adsk_PlatformSolutionsAndEmergingBusinessMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |