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Significant Accounting Policies and Practices and Recent Accounting Pronouncements - Contractholder Funds and Furutre Policy Benefits (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Reserves for Contractholder Funding Agreement	$ 523.9	$ 525.8
Investment Owned, at Fair Value	$ 482.2	$ 573.2
Indexed Universal Life [Member] | Minimum [Member]
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Interest crediting rate, policyholder liabilities	0.00%
Indexed Universal Life [Member] | Maximum
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Interest crediting rate, policyholder liabilities	4.50%
Life Insurance Product Line [Member] | Minimum [Member]
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield	5.80%
Life Insurance Product Line [Member] | Maximum
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield	6.00%
Life Contingent Payout Annuity [Member] | Minimum [Member]
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield	0.80%
Life Contingent Payout Annuity [Member] | Maximum
Schedule of Benefits and Other Changes in Policy Reserves [Line Items]
Long-Duration Contracts, Assumptions by Product and Guarantee, Estimated Average Investment Yield	6.00%

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Reserves for Contractholder Funding Agreement

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Value of the investment at close of period. For schedules of investments that are categorized, the value would be aggregated by category. For investment in and advances to affiliates, if operations of any controlled companies are different in character from those of the company, group such affiliates within divisions and by type of activities.

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