Pension and Other Postretirement Employee Benefit Plans - Weighted-Average Assumptions Net Periodic Benefit Costs (Details)	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Defined benefit pension plans, U.S.
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.00%	5.00%	3.90%
Expected long-term rate of return on plan assets	6.50%
Expected long-term rate of return on plan assets		7.00%	7.50%
Non-U.S. defined benefit pension plans | Minimum
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	1.00%	1.10%	1.40%
Expected long-term rate of return on plan assets	0.90%	1.20%	2.40%
Non-U.S. defined benefit pension plans | Maximum
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	3.60%	4.40%	4.40%
Expected long-term rate of return on plan assets	4.80%	5.30%	4.90%
OBEP plans, U.S.
Weighted-average assumptions used to determine net periodic benefit costs
Discount rate	4.10%	4.90%	3.90%
Expected long-term rate of return on plan assets	5.75%
Expected long-term rate of return on plan assets	6.00%	6.25%	6.25%
Health care cost trend rate:
Assumed for next year	6.00%	6.50%	7.00%
Ultimate	5.00%	5.00%	5.00%
Year when rate will reach ultimate	2017	2017	2017
Rate of compensation increase, U.S.
Weighted-average assumptions used to determine net periodic benefit costs
Rate of compensation increase	3.50%	3.50%	4.00%
Rate of compensation, Non-U.S. | Minimum
Weighted-average assumptions used to determine net periodic benefit costs
Rate of compensation increase	2.75%	2.75%	2.75%
Rate of compensation, Non-U.S. | Maximum
Weighted-average assumptions used to determine net periodic benefit costs
Rate of compensation increase	4.20%	4.60%	4.10%