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Variable interest entities (Maximum exposure to loss in VIEs) (Details) - USD ($) $ in Thousands | Dec. 31, 2017 | Dec. 31, 2016
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Variable Interest Entities [Abstract] |  |
Carrying value of investments (Note 11) | $ 122,946 | $ 118,783
Debt guarantees | 104,867 | 125,429
Maximum exposure to loss | $ 227,813 | $ 244,212

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- Definition Variable Interest Entities [Abstract] + References No definition available. + Details
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- Definition Variable interest entity, entity maximum loss exposure, debt guaranteed, amount + References No definition available. + Details
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- Definition Variable Interest Entity, Entity Maximum Loss Exposure, Equity Investment and Cost Method Investment Amount + References No definition available. + Details
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Namespace Prefix: | aer_
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- Definition The reporting entity's maximum amount of exposure to loss as a result of its involvement with the Variable Interest Entity (VIE). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph b -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5728-111685 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5747-111685 + Details
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