Acquisitions Acquisitions Textuals (Details) $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($) Employees	Dec. 31, 2014 USD ($)	Dec. 31, 2013 USD ($)
Business Acquisition [Line Items]
Goodwill	$ 778.3	$ 632.1	$ 659.8
Wolverine Advanced Materials Acquisition [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	298.1
Borrowings Against Revolving Credit Facility	$ 200.0
Entity Number of Employees | Employees	500
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period		154.0
Goodwill	$ 161.6
Hartzell Aerospace Acquisition [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	52.9
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period		34.0
Goodwill	$ 13.3
Sales to ITT Corporation [Member] | Wolverine Advanced Materials Acquisition [Member]
Business Acquisition [Line Items]
Business Acquisition, Revenue Reported by Acquired Entity for Last Annual Period		$ 17.0