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Affiliated Companies (Textuals) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]      
Unremitted income of affiliated companies $ 82.4 $ 75.8 $ 69.9
Dividends received from affiliated companies 2.2 1.7 2.2
Purchases and royalty payments made to affiliates 115.1 86.3 86.7
Amount due and payable to affiliates 20.8 12.9  
Sales to affiliates 9.2 9.6 8.1
Amount receivable from affiliates 1.9 1.6  
Equity method investments 179.3 77.8  
Aggregate carrying amount of investment in affiliated companies that are not accounted for under the equity method 13.4 13.4  
Daikyo Seiko, Ltd. [Member]      
Schedule of Equity Method Investments [Line Items]      
Equity in unrealized gains (losses) in securities available-for-sale and derivative instruments $ (0.4) $ (0.4) $ (0.5)