Pension and Other Post-Retirement Benefits (Details 4)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Foreign Funded Pension Plans, Defined Benefit [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.65%	5.40%
Rate of pension-in-payment increases, benefit obligation	2.90%	3.40%
Discount rate, net periodic cost (benefit)	5.40%	5.70%
Expected return on plan assets, net periodic cost (benefit)	6.12%	6.56%
Rate of pension-in-payment increases, net periodic cost (benefit)	3.40%	3.50%
Domestic defined benefit pension plans [Member] | Salaried Funded and Unfunded Plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.80%	5.25%
Rate of pension-in-payment increases, benefit obligation	3.00%	4.50%
Discount rate, net periodic cost (benefit)	5.25%	5.70%
Expected return on plan assets, net periodic cost (benefit)	8.65%	8.75%
Rate of pension-in-payment increases, net periodic cost (benefit)	4.50%	4.50%
Domestic defined benefit pension plans [Member] | Hourly Funded Plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.85%	5.25%
Discount rate, net periodic cost (benefit)	5.25%	5.70%
Expected return on plan assets, net periodic cost (benefit)	7.80%	7.90%
Other post-retirement benefit plans [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, net periodic cost (benefit)	4.95%	5.45%
Other post-retirement benefit plans [Member] | Salaried Health [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.50%	4.95%
Other post-retirement benefit plans [Member] | Salaried Life Insurance [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.75%	4.95%
Other post-retirement benefit plans [Member] | Hourly Health [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.60%	4.95%
Other post-retirement benefit plans [Member] | Hourly Life Insurance [Member]
Expected long term return on assets and to measure the periodic cost
Discount rate, benefit obligation	4.45%	4.95%