Employee Benefit Plans (Details 3)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate	4.11%	[1],[2]	4.94%	[1],[2]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	9.00%
United States Pension Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.95%	[2]	5.70%	[2]	5.93%	[2]
United States Postretirement Benefit Plans of US Entity, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.63%	[2],[3]	5.55%	[2],[3]	5.75%	[2],[3]
Defined Benefit Plan, Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.00%	[2],[4]	7.00%	[2],[4]	7.50%	[2],[4]
Other Pension Plans, Postretirement or Supplemental Plans, Defined Benefit [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	4.88%	[2]	5.63%	[2]	5.88%	[2]
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets	8.94%	[2]	8.93%	[2]	8.82%	[2]

[1] (1) Our 2012 and 2011 benefit obligations are measured using a mortality table projected to 2016 and 2015, respectively.

[2] (2) Future compensation levels do not impact our frozen defined benefit pension plans or other postretirement plans and impact only a small portion of our other postemployment liability.

[3] (4) Our assumptions reflect various remeasurements of certain portions of our obligations and represent the weighted average of the assumptions used for each measurement date.

[4] Assumed healthcare cost trend rate at December 31, 2012 is assumed to decline gradually to 5.00% by 2021 and remain level thereafter.