Pension and Other Postretirement Employee Benefit Plans - Actual Rate of Return on Plan Assets (Details 4)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Defined Benefit Pension Plans, U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	7.50%	7.50%	7.50%
Actual rate of return:
Defined Benefit Plan Actual Return On Plan Assets Percentage	12.66%	0.72%	12.23%
OPEB plans, U.S. [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	6.25%	6.25%	7.00%
Actual rate of return:
Defined Benefit Plan Actual Return On Plan Assets Percentage	10.10%	5.22%	11.23%
Minimum [Member]
Defined Benefit Plan Disclosure [Line Items]
Period of Time Used to Project Long-Term Returns for Defined Benefit Pension and OPEB Plans	10 years
Minimum [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	2.50%	2.40%	2.40%
Actual rate of return:
Defined Benefit Plan Actual Return On Plan Assets Percentage	7.21%	(4.29%)	0.77%
Maximum [Member] | Foreign Pension Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	4.60%	5.40%	6.20%
Actual rate of return:
Defined Benefit Plan Actual Return On Plan Assets Percentage	11.72%	13.12%	10.65%