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Pension Plans and Other Postretirement Benefits (Details 13) (Pension Benefits [Member])
 12 Months Ended
Dec. 31, 2013
U.S. equities [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 18.00%
Target asset allocations range, Maximum 40.00%
International equities [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 7.00%
Target asset allocations range, Maximum 17.00%
Global debt securities and cash [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 35.00%
Target asset allocations range, Maximum 48.00%
Private equity [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 0.00% [1]
Target asset allocations range, Maximum 10.00% [1]
Hedge funds [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 0.00% [1]
Target asset allocations range, Maximum 10.00% [1]
Real estate and other [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 0.00% [1]
Target asset allocations range, Maximum 10.00% [1]
Private Equity, Hedge Funds, and Real Estate and Other [Member]
  
Defined Benefit Plan Disclosure [Line Items]  
Target asset allocations range, Minimum 18.00%
Target asset allocations range, Maximum 20.00%
[1] Have a combined target allocation of 18% and a 20% limit.