Postretirement Benefit Plans (Details 8)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Net Periodic Benefit Cost Assumptions
Expected long-term rate of return on plan assets	7.38%	7.38%	7.40%
United States
Benefit Obligation Assumptions
Discount rate	4.27%	4.01%	4.79%
Net Periodic Benefit Cost Assumptions
Discount rate	4.01%	4.79%	4.13%
Expected long-term rate of return on plan assets	8.00%	8.00%	8.00%
Rate of future compensation increase			4.50%
International
Benefit Obligation Assumptions
Discount rate	3.44%	3.14%	4.23%
Rate of future compensation increase	3.29%	3.34%	3.48%
Net Periodic Benefit Cost Assumptions
Discount rate	3.14%	4.23%	4.04%
Expected long-term rate of return on plan assets	7.31%	7.30%	7.33%
Rate of future compensation increase	3.34%	3.48%	3.50%