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Other Expense (Income) (Tables) | 12 Months Ended
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Dec. 31, 2015
Other Income and Expenses [Abstract] |
Schedule of Other Income and Expense | Other expense (income) consisted of:
($ in millions) | 2015 |  | 2014 |  | 2013
Pension settlement charge | $ | 50.4 |  |  | $ | — |  |  | $ | — |
Executive retirement and related costs | 10.9 |  |  | — |  |  | — |
License costs | — |  |  | 1.2 |  |  | — |
Development income | (1.5 | ) |  | (1.6 | ) |  | (2.0 | )
Contingent consideration costs | 1.1 |  |  | 1.0 |  |  | 1.0 |
Other items | (0.8 | ) |  | (0.8 | ) |  | 0.5 |
Total other expense (income) | $ | 60.1 |  |  | $ | (0.2 | ) |  | $ | (0.5 | )

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