Retirement Plans and Postretirement Medical Benefits (Weighted-Average Actuarial Assumptions) (Details)	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Defined Benefit Plan Disclosure [Line Items]
Expected return on plan assets	6.50%	7.00%
United States
Defined Benefit Plan Disclosure [Line Items]
Discount rate	4.20%	4.55%	4.15%
Discount rate	4.55%	4.15%	4.95%
Expected return on plan assets	7.00%	7.00%	7.00%
Rate of compensation increase			3.50%
Foreign | Minimum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	0.70%	1.15%	1.10%
Discount rate	1.15%	1.10%	1.45%
Expected return on plan assets	3.75%	4.00%	3.75%
Rate of compensation increase	1.50%	1.50%	1.50%
Rate of compensation increase	1.50%	1.50%	1.50%
Foreign | Maximum
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.65%	3.95%	3.80%
Discount rate	3.95%	3.80%	4.60%
Expected return on plan assets	6.51%	7.00%	7.50%
Rate of compensation increase	2.50%	3.50%	3.50%
Rate of compensation increase	3.50%	3.50%	3.50%
U.S. nonpension postretirement plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.90%	4.20%	3.90%
Discount rate	4.20%	3.90%	4.40%
Foreign nonpension postretirement plans
Defined Benefit Plan Disclosure [Line Items]
Discount rate	3.65%	3.95%	3.80%
Discount rate	3.95%	3.80%	4.65%