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Consolidated Statements of Changes in Equity (Parenthetical) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2019 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018
Maximum [Member] | Ordinary Shares [Member] |  |  |  |
Exercise of options by employees and vested RSUs | $ 0.5 | $ 0.5 | $ 0.5 | $ 0.5

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