Affiliated Companies (Textuals) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Schedule of Equity Method Investments [Line Items]
Unremitted income of affiliated companies	$ 51.2	$ 46.7	$ 41.9
Dividends received from affiliated companies	0.8	0.6	0.4
Purchases and royalty payments made to affiliates	68.7	67.7	75.2
Amount due and payable to affiliates	5.9	5.6
Sales to affiliates	5.1	5.9	3.5
Amount receivable from affiliates	0.6	0.3
Equity method investments	57.1	57.9
Cost method investment	3.5	3.0
Daikyo Seiko, Ltd. [Member]
Schedule of Equity Method Investments [Line Items]
Equity in unrealized (gains) losses in securities available-for-sale and derivative instruments	$ (4.7)	$ (4.3)	$ (0.8)