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Funds Withheld Receivables Maturities of Investments (Tables) | 6 Months Ended
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Mar. 31, 2017
Investments, Debt and Equity Securities [Abstract] |
Investments Classified by Contractual Maturity Date [Table Text Block] |
| March 31, 2017
| Amortized Cost |  | Fair Value
Corporate, Non-structured Hybrids, Municipal and Preferred stock: |  |  |
Due in one year or less | $ | 18.6 |  |  | $ | 18.6 |
Due after one year through five years | 201.6 |  |  | 198.0 |
Due after five years through ten years | 498.0 |  |  | 496.2 |
Due after ten years | 496.3 |  |  | 481.6 |
Subtotal | 1,214.5 |  |  | 1,194.4 |
Other securities which provide for periodic payments: |  |  |
Asset/Mortgage-backed securities | 333.2 |  |  | 330.7 |
Structured hybrids | 19.1 |  |  | 18.3 |
Total fixed maturity and equity securities included in funds withheld receivables | $ | 1,566.8 |  |  | $ | 1,543.4 |

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- Definition Tabular disclosure of maturities of an entity's investments as well as any other information pertinent to the investments. + References No definition available. + Details
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