v2.4.0.6
Employee Benefit Plans (Weighted Average Assumptions Used to Determine Net Periodic Benefit Costs) (Details)
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Pension
     
Discount rate 4.57% 5.44% 5.91%
Expected long-term rate of return on plan assets 3.78% 4.78% 4.78%
Rate of future compensation increases 2.14% 2.28% 5.13%
Postretirement
     
Discount rate 4.56% 5.41%  
Minimum | Postretirement
     
Discount rate     5.35%
Maximum | Postretirement
     
Discount rate     6.00%