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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2013
Income Tax Disclosure [Abstract] |
Schedule of Current and Deferred Income Tax Assets Table [Text Block] | Current and Deferred Income Tax Assets at June 30, 2013 and December 31, 2012 were:
(Dollars in Millions) |  | Jun 30, 2013 |  | Dec 31, 2012
Current Income Tax Assets |  | $ | 20.9 |  |  | $ | 5.4 |
Deferred Income Tax Assets |  | 64.8 |  |  | 6.6 |
Valuation Allowance for State Income Taxes |  | — |  |  | (6.6 | )
Current and Deferred Income Tax Assets |  | $ | 85.7 |  |  | $ | 5.4 |
Schedule of Components of Income Tax Liabilities Table [Text Block] | The components of Liabilities for Income Taxes at June 30, 2013 and December 31, 2012 were:
(Dollars in Millions) |  | Jun 30, 2013 |  | Dec 31, 2012
Deferred Income Tax Liabilities |  | $ | — |  |  | $ | 15.1 |
Unrecognized Tax Benefits |  | 6.5 |  |  | 6.4 |
Liabilities for Income Taxes |  | $ | 6.5 |  |  | $ | 21.5 |

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