Pension and Other Post-Retirement Benefits (Details 6) (Domestic defined benefit pension plans [Member])	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	100.00%
Actual plan asset allocations	100.00%	100.00%
Equity Securities [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	66.00%
Actual plan asset allocations	65.30%	64.10%
Debt Securities [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	29.00%
Actual plan asset allocations	28.90%	30.10%
Real Estate [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	5.00%
Actual plan asset allocations	5.80%	5.20%
Cash [Member]
Weighted-average asset allocations of domestic funded pension plans
Target asset allocation percentage	0.00%
Actual plan asset allocations	0.00%	0.60%