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Significant Accounting Policies (Schedule Of Estimated Useful Life Of Assets) (Details) | 12 Months Ended
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Dec. 31, 2011
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 15.00% |
Buildings And Leasehold Improvements [Member] | Minimum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 2.00% | [1]
Buildings And Leasehold Improvements [Member] | Maximum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 20.00% | [1]
Instruments, Machinery And Equipment [Member] | Minimum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 3.00% |
Instruments, Machinery And Equipment [Member] | Maximum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 33.00% |
Office Furniture And Other [Member] | Minimum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 4.00% |
Office Furniture And Other [Member] | Maximum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 33.00% |
Motor Vehicles [Member] | Minimum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 12.00% |
Motor Vehicles [Member] | Maximum [Member] |  |
Property, Plant and Equipment, Net [Line Items] |  |
Percentage of depreciation | 33.00% |
[1] | Prepayments for operating lease and leasehold improvements are amortized generally over the term of the lease or the useful life of the assets, whichever is shorter.

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- Definition Percentage of depreciation over the estimated useful life of assets + References No definition available. + Details
Name: | eslt_PercentageOfDepreciationOverEstimatedUsefulLifeOfAssets
Namespace Prefix: | eslt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration