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Financial Instruments (Details Textual 1) - USD ($) $ in Millions | Sep. 30, 2017 | Apr. 01, 2017
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Schedule of Available-for-sale Securities [Line Items] |  |
Time Deposits, Long term | $ 82.6 | $ 21.4
Bank Time Deposits [Member] |  |
Schedule of Available-for-sale Securities [Line Items] |  |
Time Deposits, Short term | 507.1 | 684.7
Time Deposits, Long term | $ 82.6 | $ 21.4

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