Represents the amount payable in each calendar year.

No definition available.

Name:	air_FiniteLivedIntangibleAssetsAmountPayableInEachCalendarYear
Namespace Prefix:	air_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of current portion of the deferred payments which are recorded in accrued liabilities.

+ References

No definition available.

+ Details

Name:	air_FiniteLivedIntangibleAssetsCurrentPortionOfDeferredPayments
Namespace Prefix:	air_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the amount of long-term portion which is included in other liabilities and deferred income.

+ References

No definition available.

+ Details

Name:	air_FiniteLivedIntangibleAssetsNonCurrentPortion
Namespace Prefix:	air_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Represents the term of agreement.

+ References

No definition available.

+ Details

Name:	air_FiniteLivedIntangibleAssetsTermOfAgreement
Namespace Prefix:	air_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Net carrying amount as of the balance sheet date of certain rights acquired to exercise a certain privilege or pursue a particular business or occupation and which is deemed to have a finite economic life.

+ References

No definition available.

+ Details

Name:	air_FiniteLivedLicenseAgreementsNet
Namespace Prefix:	air_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of increase in assets, excluding financial assets, lacking physical substance with a definite life, resulting from a business combination.

+ References

No definition available.

+ Details

Name:	us-gaap_FinitelivedIntangibleAssetsAcquired1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

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

- Definition

Useful life of finite-lived intangible assets, 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_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to acquire asset without physical form usually arising from contractual or other legal rights, excluding goodwill.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquireIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Other Noncurrent Assets (Details 2) (USD $) In Millions, unless otherwise specified			1 Months Ended		12 Months Ended
	May 31, 2014	May 31, 2013	Jun. 30, 2011 Exclusive distribution rights Unison Industries	May 31, 2014 Exclusive distribution rights Unison Industries	May 31, 2014 License Unison Industries	May 31, 2013 License Unison Industries
Intangible assets
Term of agreement			10 years
Amount agreed to be paid			$ 20.0
Amount paid			7.0
Amount payable in each calendar year				1.3
License fees	13.0	14.7			11.9	13.5
Amortization period					10 years
Current portion of the deferred payments					1.3
Long-term portion					$ 5.9