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Income Taxes (Tables) | 6 Months Ended
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Jun. 30, 2014
Income Tax Disclosure [Abstract] |
Schedule of Effective Income Tax Rate Reconciliation | A reconciliation of income taxes computed at the U.S. Federal statutory income tax rate to the provision for income taxes is as follows ($ in millions):
| Three Months Ended |  | Six Months Ended
| June 30, 2014 |  | June 30, 2013 |  | June 30, 2014 |  | June 30, 2013
| Amount |  | Percent |  | Amount |  | Percent |  | Amount |  | Percent |  | Amount |  | Percent
Tax provision at U.S. statutory rate | $ | 11.0 |  |  | 35.0 | % |  | $ | 14.8 |  |  | 35.0 | % |  | $ | 22.3 |  |  | 35.0 | % |  | $ | 29.7 |  |  | 35.0 | %
Foreign income tax rate differential | (4.7 | ) |  | (15.0 | ) |  | (2.0 | ) |  | (4.7 | ) |  | (7.0 | ) |  | (11.0 | ) |  | (3.8 | ) |  | (4.5 | )
Tax effects of foreign legal structure | — |  |  | — |  |  | (0.4 | ) |  | (1.0 | ) |  | 0.3 |  |  | 0.5 |  |  | (0.7 | ) |  | (0.8 | )
Adjustments to valuation allowances | 0.9 |  |  | 2.9 |  |  | — |  |  | — |  |  | 0.9 |  |  | 1.4 |  |  | — |  |  | — |
French business tax classified as income tax | 0.6 |  |  | 1.9 |  |  | 0.5 |  |  | 1.1 |  |  | 1.1 |  |  | 1.7 |  |  | 1.1 |  |  | 1.3 |
Other foreign taxes, net | (0.6 | ) |  | (1.9 | ) |  | 0.8 |  |  | 1.8 |  |  | (1.0 | ) |  | (1.5 | ) |  | — |  |  | — |
Other, net | (0.7 | ) |  | (2.1 | ) |  | 0.1 |  |  | 0.2 |  |  | (0.3 | ) |  | (0.5 | ) |  | (0.1 | ) |  | (0.1 | )
Provision for income taxes | $ | 6.5 |  |  | 20.8 | % |  | $ | 13.8 |  |  | 32.4 | % |  | $ | 16.3 |  |  | 25.6 | % |  | $ | 26.2 |  |  | 30.9 | %

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- Definition Tabular disclosure of the reconciliation using percentage or dollar amounts of the reported amount of income tax expense attributable to continuing operations for the year to the amount of income tax expense that would result from applying domestic federal statutory tax rates to pretax income from continuing operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32687-109319 + Details
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