Pensions and Postretirement Benefits Other than Pensions (Details 3)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
All Plans [Member] | Pension Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	5.39%	5.74%	6.11%
Expected return on plan assets	7.58%	8.24%	8.22%
Rate of compensation increase	0.92%	1.03%	3.32%
All Plans [Member] | Other postretirement benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	5.20%	5.75%	6.00%
Domestic Plans [Member] | Pension Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	5.35%	5.75%	6.00%
Expected return on plan assets	7.75%	8.50%	8.50%
Rate of compensation increase	0.00%	0.00%	3.25%
Domestic Plans [Member] | Other postretirement benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	5.20%	5.75%	6.00%
Foreign Plans [Member] | Pension Benefits [Member]
Weighted-average assumptions used to determine net periodic benefit cost
Discount rate	5.50%	5.70%	6.49%
Expected return on plan assets	7.05%	7.44%	7.32%
Rate of compensation increase	3.39%	3.74%	3.55%