Pension and Other Post-Retirement Benefits (Details 7) (Foreign Pension Plans, Defined Benefit [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	100.00%
Actual plan asset allocations	100.00%	100.00%
Equity Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	36.80%
Actual plan asset allocations	36.20%	36.10%
Debt Securities [Member]
Weighted-average asset allocations of its foreign funded pension plan
Target asset allocation percentage	63.20%
Actual plan asset allocations	63.80%	63.90%