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Earnings per share - Narrative (Details) - shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Earnings Per Share [Abstract]
Unvested restricted stock (in shares)	4,837,602	5,822,811	2,552,346
Number of shares excluded from diluted shares outstanding (in shares)	3,099,221	122,237	2,630,066

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- Definition

Share-based Compensation Arrangement by Share-based Payment Award, Restricted Stock, Unvested

+ References

No definition available.

+ Details

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Namespace Prefix:	aer_
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Period Type:	instant

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI https://asc.fasb.org/extlink&oid=124432515&loc=d3e3550-109257

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

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- References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
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