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Major Customer And Geographic Information (Schedule Of Revenues By Major Customers) (Details) (USD $) In Thousands, unless otherwise specified | 12 Months Ended
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Dec. 31, 2011 | Dec. 31, 2010 | Dec. 31, 2009
Revenue, Major Customer [Line Items] |  |  |  |  |  |
Revenue | $ 2,817,465 |  | $ 2,670,133 |  | $ 2,832,437 |
Airborne Systems [Member] |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |
Revenue | 969,446 |  | 791,111 |  | 693,229 |
Land Vehicles Systems [Member] |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |
Revenue | 405,294 |  | 363,245 |  | 449,712 |
C Power Four ISR Systems [Member] |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |
Revenue | 996,382 |  | 1,019,068 |  | 1,168,848 |
Electro-Optic Systems [Member] |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |
Revenue | 300,158 |  | 368,808 |  | 406,396 |
Other [Member] |  |  |  |  |  |
Revenue, Major Customer [Line Items] |  |  |  |  |  |
Revenue | $ 146,185 | [1] | $ 127,901 | [1] | $ 114,252 | [1]
[1] | Mainly non-defense engineering and production services.

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- Definition Revenues by areas of operations. + References No definition available. + Details
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Namespace Prefix: | eslt_
Data Type: | xbrli:monetaryItemType
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Period Type: | duration

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- Details
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Namespace Prefix: | us-gaap_
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