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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2015
Income Tax Disclosure [Abstract] |
Schedule of Current and Deferred Tax Assets Table [Table Text Block] |
(Dollars in Millions) |  | Jun 30, 2015 |  | Dec 31, 2014
Current Income Tax Assets |  | $ | 20.8 |  |  | $ | — |
Deferred Income Tax Assets |  | 13.4 |  |  | — |
Current and Deferred Income Tax Assets |  | $ | 34.2 |  |  | $ | — |
Schedule of Components of Income Tax Liabilities [Table Text Block] | The components of Liabilities for Income Taxes at June 30, 2015 and December 31, 2014 were:
(Dollars in Millions) |  | Jun 30, 2015 |  | Dec 31, 2014
Current Income Tax Liabilities |  | $ | — |  |  | $ | 7.8 |
Deferred Income Tax Liabilities |  | — |  |  | 21.5 |
Unrecognized Tax Benefits |  | 3.6 |  |  | 7.2 |
Liabilities for Income Taxes |  | $ | 3.6 |  |  | $ | 36.5 |

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