Employee Benefit Plans Assumptions Used for. U.S Defined Benefit Plans Table (Details)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate for obligations	4.24%	4.78%	5.50%
Discount rate for benefit costs	4.78%	5.50%	6.13%
Expected long-term rate of return on plan assets	7.75%	7.75%	8.00%
Other Postretirement Benefit Plans, Defined Benefit [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Discount rate for obligations	3.69%	4.54%	4.66%
Discount rate for benefit costs	4.54%	4.66%	5.25%