v2.4.0.6

Other Expenses (Details) (USD $)	6 Months Ended	12 Months Ended
Other Expenses (Details) (USD $)	Jun. 30, 2012	Dec. 31, 2011 item	Dec. 31, 2011 Other expenses	Dec. 31, 2010 Other expenses
Other expenses details
Expense related to the cancellation of an aircraft engine order			$ 20,000,000
Number of payments for recovery of expense related to the cancellation of order		2
Number of payments for recovery of expense related to agreement with a manufacturer		1
Number of manufacturers under agreement to extend evaluation period of aircraft under order that was cancelled		1
Payment related to recovery of expense receivable included in interest and other income		10,000,000
Second payment related to agreement to reimburse remaining costs of cancelled order		10,000,000
Reserves recorded on notes receivable	(2,686,000)	21,898,000	21,900,000
Number of notes receivable on which reserves is recorded		3
Reserves recorded on finance and sales-type leases		23,088,000	23,000,000
Number of finance and sales-type leases on which reserves recorded		2
Aggregated lease related income, net of lease charges			3,000,000
Aggregated lease related costs expensed as a result of agreements to sell leased aircraft to third parties				$ 91,200,000

Represents the aggregated lease related income, net of lease charges partially offset against the notes receivable.

+ References

No definition available.

+ Details

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Namespace Prefix:	ilfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The provision made during the period for estimate of contractual payments on direct financing and sales-type leases that are probable of not being collected as of the balance sheet date.

+ References

No definition available.

+ Details

Name:	ilfc_CapitalLeasesNetInvestmentInDirectFinancingAndSalesTypeLeasesAllowanceForUncollectibleMinimumLeasePaymentsProvisionForLossGross
Namespace Prefix:	ilfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the amount of expense related to the cancellation of order.

+ References

No definition available.

+ Details

Name:	ilfc_ExpensesRelatedToCancellationOfOrder
Namespace Prefix:	ilfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Represents the number of finance and sales-type leases written down.

+ References

No definition available.

+ Details

Name:	ilfc_NumberOfFinanceAndSalesTypeLeasesWrittenDown
Namespace Prefix:	ilfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of notes receivable written down.

+ References

No definition available.

+ Details

Name:	ilfc_NumberOfNotesReceivableWrittenDown
Namespace Prefix:	ilfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of payments for recovery of expense of cancellation of order, related to agreement with a manufacturer.

+ References

No definition available.

+ Details

Name:	ilfc_RecoveryOfExpenseNumberOfPaymentRelatedToAgreementWithManufacturer
Namespace Prefix:	ilfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the number of payments for recovery of expenses.

+ References

No definition available.

+ Details

Name:	ilfc_RecoveryOfExpenseNumberOfPayments
Namespace Prefix:	ilfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the amount of payment receivable related to recovery of expenses, which is included in interest and other in the condensed, consolidated statement of income.

+ References

No definition available.

+ Details

Name:	ilfc_RecoveryOfExpensePaymentReceivableIncludedInInterestAndOtherIncome
Namespace Prefix:	ilfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Represents the number of manufacturers under an agreement to extend the evaluation period of aircraft under the order that was cancelled.

+ References

No definition available.

+ Details

Name:	ilfc_RecoveryOfExpenseRelatedToAgreementToExtendEvaluationPeriodOfAircraftUnderOrderNumberOfManufacturers
Namespace Prefix:	ilfc_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Represents the second payment related to recovery of expenses under an agreement with another manufacturer, which among other contractual terms, includes a provision to reimburse us for the remaining costs associated with the order cancellation.

+ References

No definition available.

+ Details

Name:	ilfc_RecoveryOfExpensesSecondPaymentAmountRelatedToAgreementToReimburseRemainingCostsAssociatedWithCancelledOrder
Namespace Prefix:	ilfc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Reflects the gross amount charged against earnings during the period as credit losses (bad debt expense) based on review of the loan and lease portfolio and application of the methodology for estimating credit losses.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 114

-Paragraph 20

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.7(d))

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 310

-SubTopic 10

-Section 50

-Paragraph 15

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=7512638&loc=d3e5212-111524

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 7

-Subparagraph d

-Article 9

+ Details

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

- Definition

This element represents the amortization of deferred leasing fees incurred by the lessor and amortized over the term of the lease. Such fees represent (a) costs to originate a lease incurred in transactions with independent third parties that (i) result directly from and are essential to acquire that lease and (ii) would not have been incurred had that leasing transaction not occurred and (b) certain costs directly related to specified activities performed by the lessor for that lease. Those activities are: evaluating the prospective lessee's financial condition; evaluating and recording guarantees, collateral, and other security arrangements; negotiating lease terms; preparing and processing lease documents; and closing the transaction.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6943989&loc=d3e3602-108585

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.3)

-URI http://asc.fasb.org/extlink&oid=6880815&loc=d3e20235-122688

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 840

-SubTopic 20

-Section 25

-Paragraph 17

-URI http://asc.fasb.org/extlink&oid=6748888&loc=d3e40246-112709

+ Details

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

- Details

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Data Type:	xbrli:stringItemType
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Period Type:	duration

ILFC Holdings, Inc. S-1/A