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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2014
Accounting Policies [Abstract] |
Schedule of Accumulated Other Comprehensive Loss | Components of accumulated other comprehensive loss were as follows ($ in millions):
| December 31,
| 2014 |  | 2013
Accumulated pension and OPEB liability adjustments, net of income tax impact of $21.0 million and $16.6 million at December 31, 2014 and 2013, respectively | $ | (38.4 | ) |  | $ | (30.1 | )
Accumulated unrealized loss on derivative instruments, net of income tax impact of $0 and $0.3 million at December 31, 2014 and 2013, respectively | (8.3 | ) |  | (8.1 | )
Accumulated unrealized foreign currency translation adjustments | (29.8 | ) |  | 33.2 |
Accumulated other comprehensive loss | $ | (76.5 | ) |  | $ | (5.0 | )
Schedule of Comprehensive Loss | Changes in the components of accumulated other comprehensive loss were as follows ($ in millions):
| For the Years Ended December 31,
| 2014 |  | 2013 |  | 2012
| Pre-tax |  | Tax |  | Net of Tax |  | Pre-tax |  | Tax |  | Net of Tax |  | Pre-tax |  | Tax |  | Net of Tax
Pension and OPEB liability adjustments | $ | (12.7 | ) |  | $ | 4.4 |  |  | $ | (8.3 | ) |  | $ | 19.8 |  |  | $ | (6.7 | ) |  | $ | 13.1 |  |  | $ | 2.5 |  |  | $ | (1.5 | ) |  | $ | 1.0 |
Unrealized loss on derivative instruments | (0.4 | ) |  | 0.2 |  |  | (0.2 | ) |  | (4.9 | ) |  | (1.8 | ) |  | (6.7 | ) |  | (2.7 | ) |  | 0.9 |  |  | (1.8 | )
Unrealized foreign currency translation adjustments | (63.0 | ) |  | — |  |  | (63.0 | ) |  | 4.0 |  |  | — |  |  | 4.0 |  |  | 9.9 |  |  | — |  |  | 9.9 |
Total | $ | (76.1 | ) |  | $ | 4.6 |  |  | $ | (71.5 | ) |  | $ | 18.9 |  |  | $ | (8.5 | ) |  | $ | 10.4 |  |  | $ | 9.7 |  |  | $ | (0.6 | ) |  | $ | 9.1 |

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- Definition Tabular disclosure of the components of accumulated other comprehensive income (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -URI http://asc.fasb.org/extlink&oid=36458714&loc=SL7669686-108580 + Details
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- Definition Tabular disclosure of components of comprehensive income (loss). Includes, but is not limited to, foreign currency translation adjustments, foreign currency transactions designated as economic hedges of a net investment in foreign entity, gain (loss) and prior service cost (credit) for pension plans and other postretirement benefit plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=36458714&loc=d3e526-108580 + Details
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