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Significant Accounting Policies (Schedule Of Estimated Useful Life Of Assets) (Details) | 12 Months Ended
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Dec. 31, 2012 Motor Vehicles [Member] | Dec. 31, 2012 Maximum [Member] Buildings And Leasehold Improvements [Member] | Dec. 31, 2012 Maximum [Member] Instruments, Machinery And Equipment [Member] | Dec. 31, 2012 Maximum [Member] Office Furniture And Other [Member] | Dec. 31, 2012 Maximum [Member] Motor Vehicles [Member] | Dec. 31, 2012 Minimum [Member] Buildings And Leasehold Improvements [Member] | Dec. 31, 2012 Minimum [Member] Instruments, Machinery And Equipment [Member] | Dec. 31, 2012 Minimum [Member] Office Furniture And Other [Member] | Dec. 31, 2011 Minimum [Member] Motor Vehicles [Member]
Property, Plant and Equipment, Net [Line Items] |  |  |  |  |  |  |  |  |  |  |
Percentage Of Depreciation Over Estimated Useful Life Of Assets | 15.00% | 20.00% | [1] | 33.00% | 33.00% | 33.00% | 2.00% | [1] | 3.00% | 4.00% | 12.00%
[1] | Prepayments for operating leases 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 Estimated Useful Life Of Assets + References No definition available. + Details
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Namespace Prefix: | eslt_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

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