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SUBSEQUENT EVENTS - (Details) $ in Millions	Jan. 01, 2018 USD ($)
Subsequent Event | Novae Syndicate 2007
Subsequent Event [Line Items]
Ceded reserves for losses and loss expenses	$ 819

X

- Definition

Amount of recovery (expense) related to provision for policy benefits and costs incurred for policies assumed and ceded.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 20
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6480758&loc=d3e6811-158387

+ Details

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X

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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- Details

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- Details

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