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Deferred Policy Acquisition Costs | 6 Months Ended
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Jun. 30, 2018
Insurance [Abstract] |
Deferred Policy Acquisition Costs | Deferred Policy Acquisition Costs The following table represents a reconciliation of beginning and ending deferred policy acquisition costs for the three and six months ended June 30, 2018 and 2017:
|  | Three Months Ended June 30, |  | Six Months Ended June 30,
|  | 2018 |  | 2017 |  | 2018 |  | 2017
| ($ in millions) |  | ($ in millions)
Balance at the beginning of the period | $ | 319.9 |  |  | $ | 367.5 |  |  | $ | 294.3 |  |  | $ | 358.4 |
| Acquisition costs deferred | 64.6 |  |  | 93.4 |  |  | 181.0 |  |  | 216.2 |
| Amortization of deferred policy acquisition costs | (85.9 | ) |  | (96.3 | ) |  | (176.7 | ) |  | (210.0 | )
Balance at the end of the period | $ | 298.6 |  |  | $ | 364.6 |  |  | $ | 298.6 |  |  | $ | 364.6 |

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- Definition The entire disclosure for deferred policy acquisition costs. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 30 -URI http://asc.fasb.org/subtopic&trid=4737841 + Details
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- References No definition available. + Details
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