XML 125 R109.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Income taxes (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Income Tax Disclosure [Line Items] |  |  |  |
Net deferred income tax liabilities |  | $ 522,714 | $ 363,534 |
Deferred income tax assets |  | 151,234 | 215,445 |
Deferred income tax liabilities |  | 673,948 | 578,979 |
Valuation allowance on tax assets |  | 104,858 | 127,361 | $ 72,000
Unrecognized tax benefits |  | $ 31,000 | $ 29,800 |
Statutory income tax rate |  | 12.50% | 12.50% | 12.50%
Ireland |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Net deferred income tax liabilities |  | $ 572,165 | $ 427,914 |
Valuation allowance on tax assets |  | $ 2,928 | $ 1,562 |
Statutory income tax rate | [1] | 12.50% | 12.50% | 12.50%
United States |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Valuation allowance on tax assets |  | $ 59,983 | $ 89,130 |
Statutory income tax rate | [1] | 35.70% | 36.30% | 36.30%
Federal and state statutory rate |  | 35.70% |  |
Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit) |  | $ 22,000 |  |
The Netherlands |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Valuation allowance on tax assets |  | $ 18,240 | $ 26,758 |
Statutory income tax rate | [1] | 25.00% | 25.00% | 25.00%
Carried back period |  | 1 year |  |
Carry forward period |  | 9 years |  |
Australia |  |  |  |
Income Tax Disclosure [Line Items] |  |  |  |
Valuation allowance on tax assets |  | $ 23,700 | $ 9,900 |
[1] | The local statutory income tax expense for our significant tax jurisdictions (Ireland, the United States, the Netherlands and Isle of Man) does not differ from the actual income tax expense.

X
- Definition Effective Income Tax Rate Reconciliation, at Federal and State Statutory Income Tax Rate, Percent + References No definition available. + Details
Name: | aer_EffectiveIncomeTaxRateReconciliationatFederalandStateStatutoryIncomeTaxRatePercent
Namespace Prefix: | aer_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Income tax disclosure [Line Items] + References No definition available. + Details
Name: | aer_IncomeTaxDisclosureLineItems
Namespace Prefix: | aer_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax Credit Carryforward, Carry Back Period + References No definition available. + Details
Name: | aer_TaxCreditCarryforwardCarryBackPeriod
Namespace Prefix: | aer_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax Credit Carryforward, Carry Forward Period + References No definition available. + Details
Name: | aer_TaxCreditCarryforwardCarryForwardPeriod
Namespace Prefix: | aer_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Provisional Income Tax Expense (Benefit) + References No definition available. + Details
Name: | aer_TaxCutsAndJobsActOf2017IncompleteAccountingChangeInTaxRateProvisionalIncomeTaxExpenseBenefit
Namespace Prefix: | aer_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (b),(c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxAssetsValuationAllowance
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences without jurisdictional netting. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31931-109318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32537-109319 + Details
Name: | us-gaap_DeferredTaxLiabilities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences, with jurisdictional netting and classified as noncurrent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31931-109318 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 9 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31958-109318 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 45 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=75116654&loc=d3e31917-109318 + Details
Name: | us-gaap_DeferredTaxLiabilitiesNoncurrent
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Percentage of domestic federal statutory tax rate applicable to pretax income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32687-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SAB TOPIC 6.I) -URI http://asc.fasb.org/extlink&oid=34349781&loc=d3e330036-122817 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 13 -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32698-109319 + Details
Name: | us-gaap_EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of unrecognized tax benefits. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15A -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=65882285&loc=SL6600010-109319 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Unrecognized Tax Benefit -URI http://asc.fasb.org/extlink&oid=6527854 + Details
Name: | us-gaap_UnrecognizedTaxBenefits
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=country_IE
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=country_NL
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_IncomeTaxAuthorityAxis=country_AU
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |