Area of a real estate property occupied.

No definition available.

Name:	azpn_AreaOfRealEstatePropertyOccupied
Namespace Prefix:	azpn_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Represents the number of successive five-year terms during which the lease may be extended.

+ References

No definition available.

+ Details

Name:	azpn_OperatingLeaseNumberOfSuccessiveFiveYearTermsForWhichLeaseMayBeExtended
Namespace Prefix:	azpn_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of aggregate capital expenditure with respect to the leased premises for the reporting period incurred under operating leases net of leasehold improvement allowance.

+ References

No definition available.

+ Details

Name:	azpn_OperatingLeasesAggregateCapitalExpendituresRelatedToLeasedPremisesNet
Namespace Prefix:	azpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the base annual rent for an operating lease.

+ References

No definition available.

+ Details

Name:	azpn_OperatingLeasesBaseAnnualRent
Namespace Prefix:	azpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents capital expenditures during the period under an operating lease.

+ References

No definition available.

+ Details

Name:	azpn_OperatingLeasesCapitalExpenditures
Namespace Prefix:	azpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents contractual obligations under an operating lease at the reporting date.

+ References

No definition available.

+ Details

Name:	azpn_OperatingLeasesContractualObligations
Namespace Prefix:	azpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of contractual obligations related to the new facility capital expenditures are expected to be made in fiscal 2015.

+ References

No definition available.

+ Details

Name:	azpn_OperatingLeasesContractualObligationsExpectedToBeMade
Namespace Prefix:	azpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of cash flow for payment of future minimum non-cancelable lease.

+ References

No definition available.

+ Details

Name:	azpn_PaymentsForFutureMinimumNonCancelableLease
Namespace Prefix:	azpn_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Area of a real estate property.

+ References

No definition available.

+ Details

Name:	us-gaap_AreaOfRealEstateProperty
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Details

Name:	us-gaap_LeasesOperatingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of the lessee's leasing arrangement renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesRenewalTerm
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of the lessee's leasing arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_LesseeLeasingArrangementsOperatingLeasesTermOfContract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Rental expense for the reporting period incurred under operating leases, including minimum and any contingent rent expense, net of related sublease income.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6453985&loc=d3e41499-112717

+ Details

Name:	us-gaap_OperatingLeasesRentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_LeaseArrangementTypeAxis=azpn_OfficeSpaceInBedfordMassachusettsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Commitments and Contingencies (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Jun. 30, 2014
Operating Leases
Rent expense	$ 2.1us-gaap_OperatingLeasesRentExpenseNet	$ 1.8us-gaap_OperatingLeasesRentExpenseNet	$ 3.8us-gaap_OperatingLeasesRentExpenseNet	$ 3.6us-gaap_OperatingLeasesRentExpenseNet
Minimum
Operating Leases
Base annual rent expense					2.2
Maximum
Operating Leases
Base annual rent expense					3.9
Office space in Bedford, Massachusetts
Operating Leases
Number of successive five-year terms for which the lease may be extended					2
Extension period of lease term					5 years
Future minimum non-cancelable lease payments			35.7
Aggregate capital expenditures with respect to the leased premises			9.2
Contractual obligations	7.8		7.8
Capital expenditures			5.0
Contractual obligations related to the new facility capital expenditures are expected to be made in fiscal 2015			$ 2.8
Office space in Bedford, Massachusetts \| Lease term commencing on November 1, 2014
Operating Leases
Area of Real Estate Property					142,673
Area Of Real Estate Property Occupied					105,874
Initial term of lease					10 years 5 months
Office space in Bedford, Massachusetts \| Lease term commencing on February 1, 2015
Operating Leases
Area of Real Estate Property					36,799