Debt and Credit Facilities (Narrative) (Details)
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12 Months Ended | 12 Months Ended | 0 Months Ended | 0 Months Ended | ||||||||||||||||||||||
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Dec. 31, 2014
USD ($)
|
Dec. 31, 2013
USD ($)
|
Dec. 31, 2012
USD ($)
|
Dec. 31, 2014
Letter of Credit
USD ($)
|
Dec. 31, 2013
RenRe North America Holdings Inc.
USD ($)
|
Dec. 31, 2012
RenRe North America Holdings Inc.
USD ($)
|
Dec. 31, 2014
Syndicate 1458
Citibank Europe PLC
Letter of Credit
USD ($)
|
Dec. 31, 2014
Syndicate 1458
Citibank Europe PLC
Letter of Credit
GBP (£)
|
Dec. 31, 2014
RenaissanceRe Specialty Risks
Citibank Europe PLC
Letter of Credit
USD ($)
|
Dec. 31, 2014
Top Layer Re
Letter of Credit
USD ($)
|
Dec. 31, 2014
Top Layer Re
Capital Support Agreement
Letter of Credit
USD ($)
|
Dec. 31, 2014
DaVinciRe
USD ($)
|
Apr. 01, 2011
DaVinciRe
USD ($)
|
Mar. 17, 2010
5.75% Senior Notes Due March 15, 2020
RenRe North America Holdings Inc.
USD ($)
|
Feb. 15, 2013
5.875% Senior Notes Due February 15, 2013
USD ($)
|
Jan. 31, 2003
5.875% Senior Notes Due February 15, 2013
|
Jan. 31, 2003
5.875% Senior Notes Due February 15, 2013
USD ($)
|
Dec. 31, 2014
Revolving Credit Facility
USD ($)
|
May 23, 2013
Revolving Credit Facility
USD ($)
|
May 17, 2012
Revolving Credit Facility
USD ($)
|
Dec. 31, 2014
Revolving Credit Facility
Renaissance Reinsurance
USD ($)
|
Dec. 31, 2014
Standby Letter of Credit Facility
USD ($)
|
Dec. 31, 2014
Bilateral Facility
Renaissance Reinsurance, DaVinci, RenaissanceRe Specialty Risks, ROE and RenaissanceRe Specialty U.S.
Letter of Credit
USD ($)
|
Oct. 01, 2013
Bilateral Facility
Renaissance Reinsurance, DaVinci, RenaissanceRe Specialty Risks, ROE and RenaissanceRe Specialty U.S.
Letter of Credit
USD ($)
|
Oct. 01, 2013
Bilateral Facility
RenaissanceRe Specialty Risks
Letter of Credit
USD ($)
|
Apr. 01, 2011
LIBOR
DaVinciRe
|
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Debt Instrument [Line Items] | ||||||||||||||||||||||||||
Debt Instrument, face amount | $ 250,000,000 | $ 100,000,000 | ||||||||||||||||||||||||
Senior notes interest rate | 5.75% | 5.875% | 5.875% | |||||||||||||||||||||||
Debt instrument maturity date | March 15, 2020 | February 15, 2013 | February 15, 2013 | |||||||||||||||||||||||
Net repayment of debt | 0 | (102,436,000) | (1,937,000) | 0 | 0 | 100,000,000 | ||||||||||||||||||||
Letter of credit aggregate commitment | 250,000,000 | 150,000,000 | ||||||||||||||||||||||||
Line of credit faciltiy, maximum borrowing capacity | 350,000,000 | 300,000,000 | 50,000,000 | |||||||||||||||||||||||
Debt to capital ratio | 0.40 | 0.35 | ||||||||||||||||||||||||
Minimum net worth requirements | 500,000,000 | 2,300,000,000 | 1,100,000,000 | |||||||||||||||||||||||
Letters of credit outstanding | 624,900,000 | 83,600,000 | ||||||||||||||||||||||||
Line of Credit Facility, Amount Outstanding | 9,100,000 | 123,200,000 | ||||||||||||||||||||||||
Loan agreement, remaining borrowing capacity | 0 | 176,800,000 | ||||||||||||||||||||||||
Margin facility amount outstanding | 300,000,000 | 70,000,000 | ||||||||||||||||||||||||
Collateralized letter of credit and reimbursement agreement | 37,500,000 | |||||||||||||||||||||||||
Mandatory capital contribution in the event of capital and surplus reduction below a specified level | 50,000,000 | |||||||||||||||||||||||||
Loan agreement with related party | 100,000,000 | 200,000,000 | ||||||||||||||||||||||||
Basis spread on variable rate | 3.50% | |||||||||||||||||||||||||
Interest Paid | $ 17,200,000 | $ 20,100,000 | $ 23,100,000 |