Pension and Other Post-Retirement Benefits (Details 8) (Foreign Funded Pension Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
Foreign Funded Pension Plans, Defined Benefit [Member]
Weighted-average asset allocations of its foreign funded pension plan
Equity securities, actual plan asset	36.10%	37.10%
Debt securities, actual plan asset	63.90%	62.90%
Total, actual plan asset	100.00%	100.00%
Equity securities, target	36.80%
Debt securities, target	63.20%
Total, target	100.00%