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GENERAL AND SIGNIFICANT ACCOUNTING POLICIES (Exchange Rates And Linkage Bases) (Details) | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Exchange Rate [Line Items] |  |  |
Israeli CPI Points | 101.2 | 100.4 | 98.9
Israeli CPI Points, Change in period | 0.8 | 1.5 | (0.4)
U.S. Dollar To NIS [Member] |  |  |
Exchange Rate [Line Items] |  |  |
Exchange rate | 3.748 | 3.467 | 3.845
Exchange rate, Change in period | 8.10% | (0.10%) | (1.50%)
Euro To NIS [Member] |  |  |
Exchange Rate [Line Items] |  |  |
Exchange rate | 4.292 | 4.153 | 4.044
Exchange rate, Change in period | 3.30% | 2.70% | (4.80%)

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