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Other Operating Credits and Charges, Net (Tables) | 3 Months Ended
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Mar. 31, 2012
Other Operating Credits And Charges, Net [Abstract] |
Other Operating Credits and Charges Net [Table Text Block] | The major components of “Other operating credits and charges, net” in the Consolidated Statements of Income for the three months ended March 31, 2012 and March 31, 2011 are reflected in the table below and are described in the paragraphs following the table:
| Quarter Ended March 31,
Dollar amounts in millions | 2012 |  | 2011
Severance | $ | (0.3 | ) |  | $ | — |
Construction related legal reserves | 0.5 |  |  | — |
Settlement of legal claim | — |  |  | 0.8 |
| $ | 0.2 |  |  | $ | 0.8 |

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- Definition Other Operating Credits and Charges Net [Table Text Block] + References No definition available. + Details
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