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Affiliated Companies (Textuals) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Schedule of Equity Method Investments [Line Items] |  |  |
Unremitted income of affiliated companies | $ 63.0 | $ 56.2 | $ 51.2
Dividends received from affiliated companies | 1.4 | 0.8 | 0.8
Purchases and royalty payments made to affiliates | 94.5 | 65.8 | 68.9
Amount due and payable to affiliates | 9.0 | 10.1 |
Sales to affiliates | 6.8 | 5.3 | 5.1
Amount receivable from affiliates | 0.9 | 0.5 |
Equity method investments | 69.3 | 56.3 |
Cost method investment | 13.4 | 5.0 |
Cost method investments, original cost | 8.4 |  |
Daikyo Seiko, Ltd. [Member] |  |  |
Schedule of Equity Method Investments [Line Items] |  |  |
Equity in unrealized (gains) losses in securities available-for-sale and derivative instruments | $ (5.3) | $ (5.4) | $ (4.7)

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