Affiliated Companies (Textuals) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Schedule of Equity Method Investments [Line Items]
Unremitted income of affiliated companies	$ 75.8	$ 69.9	$ 63.0
Dividends received from affiliated companies	1.7	2.2	1.4
Purchases and royalty payments made to affiliates	86.3	86.7	94.5
Amount due and payable to affiliates	12.9	12.4
Sales to affiliates	9.6	8.1	6.8
Amount receivable from affiliates	1.6	1.3
Equity method investments	77.8	72.4
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)	$ (0.5)	$ (5.3)