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Commitments and Contingencies Commitments and Contingencies (Tables) | 12 Months Ended
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Dec. 31, 2016
Commitments and Contingencies Disclosure [Abstract] |
Schedule of Loss Contingencies by Contingency [Table Text Block] | The following table shows the professional indemnity accrual activity and related payments.
($ in millions) |
December 31, 2013 | $ | 6.2 |
New claims | 7.4 |
Prior year claims adjustments | (0.8 | )
Claims paid | (3.6 | )
December 31, 2014 | 9.2 |
New claims | 2.9 |
Prior year claims adjustments | 7.8 |
Claims paid | (0.7 | )
December 31, 2015 | 19.2 |
New claims | 8.0 |
Prior year claims adjustments | — |
Claims paid | (19.9 | )
December 31, 2016 | $ | 7.3 |

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