Reinsurance - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended		0 Months Ended	6 Months Ended
Mar. 31, 2014	Sep. 30, 2013	Dec. 31, 2012 Fgl Reinsurance Agreement With Fsr [Member]	Mar. 31, 2014 Bankers Life Insurance Company [Member]
Reinsurance Premiums for Insurance Companies, by Product Segment [Line Items]
Document Period End Date	Mar. 31, 2014
Reinsurance arrangment in percentage			10.00%
Payments for reinsurance			$ 1,400.0	$ 153.0
Contractholder funds	$ 15,998.3	$ 15,248.2

The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD.

No definition available.

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- Definition

Reinsurance Arrangement In Percentage

+ References

No definition available.

+ Details

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- Definition

Cash payments made for reinsurance during the current period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 25

-Subparagraph (g)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3536-108585

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- Definition

The total liability as of the balance sheet date of amounts due policy holders, excluding future policy benefits and claims, including unpaid policy dividends, retrospective refunds, and undistributed earnings on participating business.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.13,14)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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