Represents the gain (loss) generated from sale of assets of joint venture by joint venture partners.

No definition available.

Name:	air_GainLossFromJointVentureAssetsSoldByJointVenturePartners
Namespace Prefix:	air_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Fair value of guarantee obligation recorded as current liability.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage of guarantee on outstanding debt.

+ References

No definition available.

+ Details

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Namespace Prefix:	air_
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- Definition

The amount of loan outstanding to the joint venture.

+ References

No definition available.

+ Details

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

- Definition

Represents the number of aircraft sold by the joint venture partners during the period.

+ References

No definition available.

+ Details

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Namespace Prefix:	air_
Data Type:	xbrli:integerItemType
Balance Type:	na
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- Definition

The payment for evaluation and inspection services in relation to the divestiture of aircraft.

+ References

No definition available.

+ Details

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Namespace Prefix:	air_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)(1)
-URI http://asc.fasb.org/extlink&oid=114001798&loc=d3e33918-111571

+ Details

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Period Type:	instant

- Definition

This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment (OTTI) losses recognized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=109237563&loc=d3e33749-111570

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
-Paragraph 25
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=115929826&loc=d3e8813-108599

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Cash received from sales of long-lived depreciable flight assets, including owned aircraft or capital improvements.

+ References

No definition available.

+ Details

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

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Name:	srt_ConsolidatedEntitiesAxis=srt_PartnershipInterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_PropertyPlantAndEquipmentByTypeAxis=sic_Z3721
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Other Non-current Assets - Investments in Joint Ventures (Details) $ in Millions	12 Months Ended
	May 31, 2019 USD ($) aircraft	May 31, 2018 USD ($)	May 31, 2017 USD ($)
Investments in Joint Ventures
Investments in joint ventures	$ 12.3	$ 7.6
Owned Through Joint Ventures
Investments in Joint Ventures
Investments in joint ventures	$ 6.3
Membership interest in joint ventures (as a percent)	40.00%
Guarantee obligations, fair value	$ 4.8
Percentage on outstanding debt	40.00%
Loan to the joint venture	$ 2.8
Aircraft \| Owned Through Joint Ventures
Investments in Joint Ventures
Number of aircraft sold by joint ventures \| aircraft	2
Net cash proceeds from sale of aircraft by joint ventures	$ 7.3
Gain from sale of aircraft by joint venture partners	0.4
Payment of evaluation and inspection services	$ 0.4	$ 0.4	$ 1.2