Pension Plans and Other Postretirement Benefits (Details 2)				12 Months Ended
		Oct. 31, 2013	Oct. 29, 2013	Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013
Pension Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate		4.95%	4.25%	4.25%	[1]	5.15%	[1]
Expected long-term rate of return on assets				8.00%		8.25%		8.25%
Pension Benefits [Member] | Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	[1]							4.25%
Rate of increase in future compensation levels				3.00%		3.00%		3.00%
Pension Benefits [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	[1]							4.95%
Rate of increase in future compensation levels				3.50%		3.50%		4.50%
Other Postretirement Benefits [Member]
Defined Benefit Plan Disclosure [Line Items]
Discount rate	[1]			4.10%		5.15%		4.25%
Rate of increase in future compensation levels				0.00%		0.00%		0.00%
Expected long-term rate of return on assets				4.00%		8.30%		8.30%

[1] Pension expense for 2013 was initially measured at a 4.25% discount rate. The U.S. Plan was remeasured using a 4.95% discount rate as of October 31, 2013, following the sale of the tungsten materials business.