Retirement Plans and Postretirement Medical Benefits (Weighted-Average Actuarial Assumptions) (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	7.50%	7.38%
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.15%	4.95%	4.05%
Rate of compensation increase		3.50%	3.50%
Discount rate	4.95%	4.05%	4.95%
Expected return on plan assets	7.00%	7.25%	7.75%
Rate of compensation increase	3.50%	3.50%	3.50%
Foreign | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	1.10%	1.45%	1.95%
Rate of compensation increase	1.50%	1.50%	1.50%
Discount rate	1.45%	1.95%	1.80%
Expected return on plan assets	3.75%	3.50%	3.25%
Rate of compensation increase	1.50%	1.50%	2.10%
Foreign | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.80%	4.60%	4.65%
Rate of compensation increase	3.50%	3.50%	3.50%
Discount rate	4.60%	4.65%	6.10%
Expected return on plan assets	7.50%	7.50%	7.50%
Rate of compensation increase	3.50%	3.50%	4.60%
U.S.
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.40%	3.65%
Discount rate	4.40%	3.65%	4.50%
Canada
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.80%	4.65%	3.90%
Discount rate	4.65%	3.90%	4.15%