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Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Additional Details (Details) (USD $) In Millions, unless otherwise specified | 12 Months Ended
--- | ---
Sep. 30, 2014 | Sep. 30, 2013 | Sep. 30, 2012
Subsidiary or Equity Method Investee [Line Items] |  |  |
Gain on contingent purchase price reduction | $ 0.5 | $ 0 | $ 41.0
FGL |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 19.60% |  |
Spectrum Brands |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners | 41.30% |  |
Maximum |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Interest crediting rate, policyholder liabilities | 6.00% |  |
Gas Gathering and Processing Equipment [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Property, Plant and Equipment, Estimated Useful Lives | 14 years |  |

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