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Summary of Significant Accounting Policies (Tables) | 12 Months Ended
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Dec. 31, 2013
Accounting Policies [Abstract] |
Schedule of Accumulated Other Comprehensive Loss | Components of accumulated other comprehensive loss were as follows ($ in millions):
| December 31,
| 2013 |  | 2012
Accumulated pension and OPEB liability adjustments, net of income tax of $16.6 million and $23.3 million at December 31, 2013 and 2012, respectively | $ | (30.1 | ) |  | $ | (43.2 | )
Accumulated unrealized loss on derivative instruments, net of income tax provision (benefit) of $0.3 million and $(1.5) million at December 31, 2013 and 2012, respectively | (8.1 | ) |  | (1.4 | )
Accumulated unrealized foreign currency translation adjustments | 33.2 |  |  | 29.2 |
Accumulated other comprehensive loss | $ | (5.0 | ) |  | $ | (15.4 | )
Schedule of Comprehensive Loss | Changes in the components of accumulated other comprehensive loss were as follows ($ in millions):
| For the Years Ended December 31, |
| 2013 |  | 2012 |  | 2011
| Pre-tax |  | Tax |  | Net of Tax |  | Pre-tax |  | Tax |  | Net of Tax |  | Pre-tax |  | Tax |  | Net of Tax
Pension and OPEB liability adjustments | $ | 19.8 |  |  | $ | (6.7 | ) |  | $ | 13.1 |  |  | $ | 2.5 |  |  | $ | (1.5 | ) |  | $ | 1.0 |  |  | $ | (2.0 | ) |  | $ | (0.5 | ) |  | $ | (2.5 | )
Unrealized loss on derivative instruments | (4.9 | ) |  | (1.8 | ) |  | (6.7 | ) |  | (2.7 | ) |  | 0.9 |  |  | (1.8 | ) |  | (7.5 | ) |  | 2.6 |  |  | (4.9 | )
Unrealized foreign currency translation adjustments | 4.0 |  |  | — |  |  | 4.0 |  |  | 9.9 |  |  | — |  |  | 9.9 |  |  | (18.6 | ) |  | — |  |  | (18.6 | )
Total | $ | 18.9 |  |  | $ | (8.5 | ) |  | $ | 10.4 |  |  | $ | 9.7 |  |  | $ | (0.6 | ) |  | $ | 9.1 |  |  | $ | (28.1 | ) |  | $ | 2.1 |  |  | $ | (26.0 | )

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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=28358780&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=28358780&loc=d3e526-108580 + Details
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