Employee Benefits Plans (Details 11)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Other Postretirement benefit expense U.S. [Member]
Weighted-average discount rates used in determining annual postretirement benefit expense
Discount rate	5.00%	4.10%	4.90%
Other Postretirement benefit expense Foreign [Member]
Weighted-average discount rates used in determining annual postretirement benefit expense
Discount rate	4.80%	4.00%	4.50%