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Asset-based loan, Collateral Type, Percent

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Equity Securities Holdings Exposure Amount of Single Issuer Greater than Stated Percentage of Total Investments

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Industry Holdings, Number of Top Investments

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Investment Securities Held by Subsidiaries Subject to Specialized Industry Accounting Principles at Fair Value

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Number of investment issuers.

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Number Of Issuers In Investment

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Percentage Book Value of Investments Exceeded Stockholders Equity

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Percentage Of Accounts Receivable Major Customers

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Percentage of investments fair value in relation to invested assets portfolio.

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Percentage Of Net Sales Due To Customers

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Sales Outside Domestic Country as Percentage of Net Sales

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Total Increase or Decrease in carrying amount for the period of (a) deferred policy acquisition costs, including amortization of costs and modifications or internal replacements of existing insurance contracts, and (b) capitalized present value of future profits (also known as value of business acquired).

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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- Definition

The net amount (to the extent disclosed within this portion of the income statement) by which an insurance settlement exceeds incremental costs incurred from the event causing an interruption of business, plus the insurance award for earnings lost from the event, such as a natural catastrophe, explosion or fire.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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-Publisher FASB

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Total Increase or Decrease in accrued obligations to policy and contract holders pertaining to insured events for period.

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Significant Risks and Uncertainties - Additional information (Details) $ in Millions	12 Months Ended
	Sep. 30, 2015 USD ($) Insurers Investment	Sep. 30, 2014 USD ($) Investment	Sep. 30, 2013 USD ($)	Sep. 30, 2012
Concentration Risk [Line Items]
Total asset-based loans	$ 395.9	$ 818.8
Liability for Future Policy Benefits, Period Increase (Decrease)	$ 18.9
Industry Holdings, Number of Top Investments	10
Percentage of total holdings in industry	39.00%
Stockholders' equity exceeded percentage	10.00%			10.00%
FGL
Concentration Risk [Line Items]
Deferred Policy Acquisition Costs and Present Value of Future Profits, Period Increase (Decrease)	$ 54.1	(2.2)	$ 33.1
Wilton Reassurance Company [Member]
Concentration Risk [Line Items]
Net amount recoverable from Wilton Re	1,493.0	1,508.8
Fair Value, Concentration of Risk, All Financial Instruments
Concentration Risk [Line Items]
FGL's investment securities in the banking industry with a fair value	$ 1,979.1	$ 2,240.3
Exposure of FGL's invested assets	10.40%	11.60%
Number of issuers in investment \| Insurers	83
Fair Value, Concentration of Risk, All Financial Instruments \| Salus Capital Partners LLC
Concentration Risk [Line Items]
Exposure of FGL's invested assets	2.10%
Fair Value, Concentration of Risk, All Financial Instruments \| Fidelity And Guaranty Life Holdings
Concentration Risk [Line Items]
Exposure of FGL's invested assets	0.90%	1.30%
Investments, Fair Value Disclosure	$ 169.7	$ 250.0
Concentrations of Risk and Major Customers
Concentration Risk [Line Items]
Percentage of net sales from major customer	14.70%	15.70%	18.00%
Percentage Of Accounts Receivable Major Customers	16.13873%	13.02174%
Sales Outside Domestic Country as Percentage of Net Sales	37.66031%	40.19624%	41.00%
Derivatives not designated as hedging instrument
Concentration Risk [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 2,159.2	$ 1,910.9
FIA embedded derivatives \| Derivatives not designated as hedging instrument
Concentration Risk [Line Items]
Liability for Future Policy Benefits, Period Increase (Decrease)		(4.8)	$ (45.3)
Contractholder funds \| FIA embedded derivatives \| Derivatives not designated as hedging instrument
Concentration Risk [Line Items]
Derivative Liability, Fair Value, Gross Liability	$ 2,149.4	$ 1,908.1
Total Shareholders’ Equity \| Fidelity And Guaranty Life Holdings
Concentration Risk [Line Items]
Exposure of FGL's invested assets	13.70%	4.00%
Number Of Investment Issuers \| Investment	32	4
Investments, Fair Value Disclosure	$ 2,613.3	$ 768.5
Asset based loan receivables [Member] \| Concentrations of Risk and Major Customers \| Salus Capital Partners LLC
Concentration Risk [Line Items]
Exposure of FGL's invested assets	0.40%
Percentage Of Accounts Receivable Major Customers	17.90139%
Inventories [Member]
Concentration Risk [Line Items]
Asset-based loan, Collateral Type, Percent	51.20%
Other assets
Concentration Risk [Line Items]
Asset-based loan, Collateral Type, Percent	32.90%
Trade Accounts Receivable [Member]
Concentration Risk [Line Items]
Asset-based loan, Collateral Type, Percent	15.90%