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Organization (Details) (USD $) In Millions, except Share data, unless otherwise specified					0 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Jun. 15, 2012	Jun. 15, 2012 Hiscox Catastrophe Fund Manager	Aug. 20, 2013 IPO
Organization [Line Items]
Ownership percentage			85.00%	15.00%
Issuance of common shares (in shares)					24,832,484
Sale of stock, price per share (in dollars per share)	$ 15.05	$ 10.89			$ 12.50
Sale of stock, net proceeds					$ 286.0

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The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

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- Definition

The cash inflow associated with the amount received from entity's first offering of stock to the public.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Financing Activities

-URI http://asc.fasb.org/extlink&oid=6513228



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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 14

-Subparagraph (a)

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Price of a single share of a number of saleable stocks of a company.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 820

-SubTopic 10

-Section 50

-Paragraph 2

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-URI http://asc.fasb.org/extlink&oid=25499696&loc=d3e19207-110258

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Number of new stock issued during the period.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3



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

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-Name Accounting Standards Codification

-Topic 505

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-Name Accounting Standards Codification

-Topic 505

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-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770



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-Publisher SEC

-Name Regulation S-X (SX)

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