Name:	azpn_InstallmentsReceivableAbstract
Namespace Prefix:	azpn_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

The percentage of total installments receivable allowance for doubtful accounts reserved for when there is a specific risk of collectability.

+ References

No definition available.

+ Details

Name:	azpn_PercentageOfTotalInstallmentsReceivableAllowanceForDoubtfulAccountsRepresentedBySpecificReserve
Namespace Prefix:	azpn_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Disclosure of the unamortized amount of the discount on the current portion of the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount.

+ References

No definition available.

+ Details

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

- Definition

Disclosure of the unamortized amount of the discount on the non-current portion of the note or receivable which is deducted from the face amount of the receivable or loan. The discount or premium is the difference between the present value and the face amount.

+ References

No definition available.

+ Details

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

- Definition

The threshold period (in days) for classification of current installments receivable. Invoices with a due date of greater than this threshold from the period-end date are classified as current installments receivable, as long as the due date is less than one year. Once an installment receivable is due within this threshold period, it is reclassified as a trade accounts receivable on the consolidated balance sheet.

+ References

No definition available.

+ Details

Name:	azpn_ThresholdPeriodForClassificationOfCurrentInstallmentsReceivable
Namespace Prefix:	azpn_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) within one year of the balance sheet date or the normal operating cycle, whichever is longer. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph a

-Article 5

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 3

-Subparagraph b

-Article 5

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 45

-Paragraph 9

-URI http://asc.fasb.org/extlink&oid=28367877&loc=d3e4531-111522

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.3(a),(b))

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section 45

-Paragraph 1

-Subparagraph (c),(e)

-URI http://asc.fasb.org/extlink&oid=28358313&loc=d3e6676-107765

+ Details

Name:	us-gaap_NotesAndLoansReceivableGrossCurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

An amount representing an agreement for an unconditional promise by the maker to pay the Entity (holder) a definite sum of money at a future date(s) more than one year from the balance sheet date. Such amount may include accrued interest receivable in accordance with the terms of the debt. The debt also may contain provisions and related items including a discount or premium, payable on demand, secured, or unsecured, interest bearing or noninterest bearing, among a myriad of other features and characteristics. This amount does not include amounts related to receivables held-for-sale.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

+ Details

Name:	us-gaap_NotesAndLoansReceivableGrossNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

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

- Details

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

- Definition

Total of allowances and reserves, the valuation and qualifying accounts that are either netted against the cost of an asset (in order to value it at its carrying value) or that reflect a liability established to represent expected future costs.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 235

-SubTopic 10

-Section S99

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e24092-122690

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 09

-Article 12

+ Details

Name:	us-gaap_ValuationAllowancesAndReservesBalance
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Significant Accounting Policies (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended
	Sep. 30, 2013	Jun. 30, 2013	Sep. 30, 2013 Allowance For Doubtful Accounts Installments Receivables Current	Jun. 30, 2012 Allowance For Doubtful Accounts Installments Receivables Current	Jun. 30, 2013 Allowance For Doubtful Accounts Installments Receivables Current Maximum	Sep. 30, 2013 Allowance For Doubtful Accounts Installments Receivables Non Current Maximum	Jun. 30, 2013 Allowance For Doubtful Accounts Installments Receivables Non Current Maximum	Jun. 30, 2012 Allowance For Doubtful Accounts Installments Receivables Non Current Maximum
Installments Receivable
Percentage of total installments receivable allowance for doubtful accounts represented by specific reserve	94.00%	96.00%
Threshold period for classification of installments receivable to trade accounts receivable (as a percent)	45 days
Installments receivable, Current
Installments receivable, gross	$ 11.5	$ 14.4
Less: Unamortized discount	0.3	0.6
Installments receivable, Non-current
Installments receivable, gross	1.0	1.1
Less: Unamortized discount	0.1	0.1
Allowance for doubtful accounts			$ 0.1	$ 0.2	$ 0.1	$ 0.1	$ 0.1	$ 0.1