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Segment and Georgraphic Data - Additional Information (Detail) $ in Millions	12 Months Ended
	Sep. 30, 2015 USD ($) Segment	Sep. 30, 2014 USD ($)	Sep. 30, 2013 USD ($)
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 675.3	$ 83.9	$ 58.2
Number of reporting segments | Segment	4
Insurance Segment [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 57.1
Asset Management segment [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	87.9
Radioshack [Member] | Insurance Segment [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	40.0
Radioshack [Member] | Asset Management segment [Member]
Segment Reporting Information [Line Items]
Asset Impairment Charges	$ 35.4

X

- Definition

Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

+ References

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



-Publisher FASB



-Name Accounting Standards Codification



-Topic 360



-SubTopic 10



-Section 45



-Paragraph 4



-URI http://asc.fasb.org/extlink&oid=51824106&loc=d3e2420-110228



Reference 2: http://www.xbrl.org/2003/role/presentationRef



-Publisher FASB



-Name Accounting Standards Codification



-Topic 230



-SubTopic 10



-Section 45



-Paragraph 28



-Subparagraph (b)



-URI http://asc.fasb.org/extlink&oid=56944662&loc=d3e3602-108585

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- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

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+ References

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