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Business and Summary of Significant Accounting Policies - Reclassifications (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Jan. 31, 2014 | Jan. 31, 2013
Accounting Policies [Abstract] |  |
Decrease to License and other revenue |  | $ (26.5)adsk_DecreaseToCostOfLicenseAndOtherRevenueForReclass
Increase to Subscription revenue |  | 26.5 adsk_IncreaseToSubscriptionRevenueForReclass
Decrease to Cost of license and other revenue |  | (32.1)adsk_DecreaseToLicenseAndOtherRevenueForReclass
Increase to Cost of subscription revenue |  | 32.1 adsk_IncreaseToCostOfSubscriptionRevenueForReclass
(Decrease) to general and administrative | (36.5)adsk_IncreaseDecreasetoGeneralandAdministrativeExpenseforReclass | (42.1)adsk_IncreaseDecreasetoGeneralandAdministrativeExpenseforReclass
Increase to amortization of purchased intangibles | $ 36.5 adsk_IncreaseDecreasetoAmortizationofIntangibleAssetsforReclass | $ 42.1 adsk_IncreaseDecreasetoAmortizationofIntangibleAssetsforReclass

X
- Definition Decrease to Cost of License and Other Revenue (for Reclass) + References No definition available. + Details
Name: | adsk_DecreaseToCostOfLicenseAndOtherRevenueForReclass
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Decrease to License and Other Revenue (for Reclass) + References No definition available. + Details
Name: | adsk_DecreaseToLicenseAndOtherRevenueForReclass
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Increase (Decrease) to Amortization of Intangible Assets (for Reclass) + References No definition available. + Details
Name: | adsk_IncreaseDecreasetoAmortizationofIntangibleAssetsforReclass
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase (Decrease) to General and Administrative Expense (for Reclass) + References No definition available. + Details
Name: | adsk_IncreaseDecreasetoGeneralandAdministrativeExpenseforReclass
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase to Cost of Subscription Revenue (for Reclass) + References No definition available. + Details
Name: | adsk_IncreaseToCostOfSubscriptionRevenueForReclass
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Increase to Subscription Revenue (for Reclass) + References No definition available. + Details
Name: | adsk_IncreaseToSubscriptionRevenueForReclass
Namespace Prefix: | adsk_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | us-gaap_AccountingPoliciesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration