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Due from/to brokers (Details) (USD $) In Millions, unless otherwise specified | Sep. 30, 2014 | Dec. 31, 2013 | Dec. 31, 2012
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Due to and from Broker-Dealers and Clearing Organizations [Abstract] |  |  |
Due to brokers | $ 14.4 tpre_PayablestoBrokerDealersandClearingOrganizationsNet | $ 268.5 tpre_PayablestoBrokerDealersandClearingOrganizationsNet | $ 90.8 tpre_PayablestoBrokerDealersandClearingOrganizationsNet

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- Definition Payables to Broker-Dealers and Clearing Organizations, Net + References No definition available. + Details
Name: | tpre_PayablestoBrokerDealersandClearingOrganizationsNet
Namespace Prefix: | tpre_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
Name: | us-gaap_DueToAndFromBrokerDealersAndClearingOrganizationsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration