Statutory Requirements	12 Months Ended
Dec. 31, 2012
Insurance [Abstract]
Statutory Requirements	STATUTORY REQUIREMENTS Bermuda-Based Insurance Entities Under the Insurance Act 1978, amendments thereto and Related Regulations of Bermuda (the "Insurance Act"), certain subsidiaries of the Company are required to prepare statutory financial statements and to file in Bermuda a statutory financial return. The Insurance Act also requires these Bermuda insurance subsidiaries of the Company to maintain certain measures of solvency and liquidity. At December 31, 2012, the statutory capital and surplus of the Company's Bermuda insurance subsidiaries was $3.1 billion (2011 – $2.7 billion) and the minimum amount required to be maintained under Bermuda law, the Minimum Solvency Margin, was $554.8 million (2011 – $552.9 million). Under the Insurance Act, Glencoe is defined as a Class 3A insurer, and Renaissance Reinsurance and DaVinci are classified as Class 4 insurers, and therefore must maintain capital at a level equal to its enhanced capital requirement ("ECR") which is established by reference to the Bermuda Solvency Capital Requirement ("BSCR") model. The BSCR is a standard mathematical model designed to give the Bermuda Monetary Authority ("BMA") more advanced methods for determining an insurer's capital adequacy. Underlying the BSCR is the belief that all insurers should operate on an ongoing basis with a view to maintaining their capital at a prudent level in excess of the minimum solvency margin otherwise prescribed under the Insurance Act. Alternatively, under the Insurance Act, insurers may, subject to the terms of the Insurance Act and to the BMA's oversight, elect to utilize an approved internal capital model to determine regulatory capital. In either case, the ECR shall at all times equal or exceed the respective Class 3A and Class 4 insurer's Minimum Solvency Margin and may be adjusted in circumstances where the BMA concludes that the insurer's risk profile deviates significantly from the assumptions underlying its ECR or the insurer's assessment of its risk management policies and practices used to calculate the ECR applicable to it. While not specifically referred to in the Insurance Act, the BMA has also established a target capital level ("TCL") for each Class 3A and Class 4 insurer equal to 120% of its respective ECR. While a Class 3A and Class 4 insurer is not currently required to maintain its statutory capital and surplus at this level, the TCL serves as an early warning tool for the BMA and failure to maintain statutory capital at least equal to the TCL will likely result in increased BMA regulatory oversight. Class 3A and Class 4 insurers are prohibited from declaring or paying any dividends if in breach of the required Minimum Solvency Margin or Minimum Liquidity Ratio (the "Relevant Margins") or if the declaration or payment of such dividend would cause the insurer to fail to meet the Relevant Margins. Where an insurer fails to meet its Relevant Margins on the last day of any financial year, it is prohibited from declaring or paying any dividends during the next financial year without the prior approval of the BMA. Further, a Class 4 insurer is prohibited from declaring or paying in any financial year dividends of more than 25% of its total statutory capital and surplus (as shown on its previous financial year's statutory balance sheet) unless it files (at least seven days before payment of such dividends) with the BMA an affidavit stating that it will continue to meet its Relevant Margins. Class 3A and Class 4 insurers must obtain the BMA's prior approval for a reduction by 15% or more of the total statutory capital as set forth in its previous year's financial statements. These restrictions on declaring or paying dividends and distributions under the Insurance Act are in addition to the solvency requirements under the Companies Act which apply to all Bermuda companies. During 2012, Renaissance Reinsurance, DaVinci and Glencoe declared aggregate cash dividends of $482.0 million, $108.0 million, and $Nil, respectively (2011 – $180.7 million, $6.8 million and $15.9 million, respectively). In addition, Glencoe returned capital of $Nil during 2012 (2011 - $234.1 million). In addition, Glencoe is also eligible as an excess and surplus lines insurer in a number of states in the U.S. and under the various capital and surplus requirements in these states is required to maintain a minimum amount of capital and surplus. In this regard, the declaration of dividends from retained earnings and distributions from additional paid-in capital are limited to the extent that the above requirement is met. The Company is currently completing its 2012 Bermuda-based statutory filings for Renaissance Reinsurance, DaVinci and Glencoe, which must be filed with the BMA on or before April 30, 2013, and at this time, the Company believes each of Renaissance Reinsurance, DaVinci and Glencoe will exceed the target level of required statutory capital. Syndicate 1458 RenaissanceRe CCL and Syndicate 1458 are subject to oversight by the Council of Lloyd's. RSML is subject to regulation by the Financial Services Authority ("FSA") under the Financial Services and Markets Act 2000. Underwriting capacity of a member of Lloyd's must be supported by providing a deposit in the form of cash, securities or letters of credit, which are referred to as Funds at Lloyd's ("FAL"). This amount is determined by Lloyd's and is based on Syndicate 1458's solvency and capital requirement as calculated through its internal model. In addition, if the FAL are not sufficient to cover all losses, the Lloyd's Central Fund provides an additional level of security for policyholders. At December 31, 2012, the FAL requirement set by Lloyd's for Syndicate 1458 is £183.2 million based on its business plan, approved in November 2012 (2011 – £93.8 million based on its business plan, approved November 2011). Actual FAL posted for Syndicate 1458 at December 31, 2012 by RenaissanceRe CCL is $222.0 million and £45.5 million supported 100% by letters of credit (2011 – $118.5 million and £24.5 million). Multi-Beneficiary Reinsurance Trusts Effective March 15, 2011, each of Renaissance Reinsurance and DaVinci was approved as a Trusteed Reinsurer in the state of New York and established a multi-beneficiary reinsurance trust ("MBRT") to collateralize its (re)insurance liabilities associated with U.S. domiciled cedants. The MBRTs are subject to the rules and regulations of the state of New York and the respective deed of trust, including but not limited to certain minimum capital funding requirements, investment guidelines, capital distribution restrictions and regulatory reporting requirements. Assets held under trust at December 31, 2012 with respect to the MBRTs totaled $508.7 million and $180.1 million for Renaissance Reinsurance and DaVinci, respectively (2011 – $450.8 million and $101.9 million, respectively), compared to the minimum amount required under U.S. state regulations of $494.9 million and $169.1 million, respectively (2011 – $274.5 million and $73.9 million, respectively). Multi-Beneficiary Reduced Collateral Reinsurance Trusts Effective December 31, 2012, each of Renaissance Reinsurance and DaVinci was approved as an Accredited Reinsurer in the state of New York and established a multi-beneficiary reduced collateral reinsurance trust ("RCT") to collateralize its (re)insurance liabilities associated with U.S. domiciled cedants in certain states where Renaissance Reinsurance or DaVinci are approved as an Accredited Reinsurer, thereby providing for a reduction in collateral requirements to 20% of the net outstanding insurance liabilities. The RCTs are subject to the rules and regulations of the state of New York and the respective deed of trust, including but not limited to certain minimum capital funding requirements, investment guidelines, capital distribution restrictions and regulatory reporting requirements. Assets held under trust at December 31, 2012 with respect to the RCTs totaled $11.0 million and $11.0 million for Renaissance Reinsurance and DaVinci, respectively, compared to the minimum amount required under U.S. state regulations of $10.0 million and $10.0 million, respectively.

STATUTORY REQUIREMENTS

Bermuda-Based Insurance Entities

Under the Insurance Act 1978, amendments thereto and Related Regulations of Bermuda (the "Insurance Act"), certain subsidiaries of the Company are required to prepare statutory financial statements and to file in Bermuda a statutory financial return. The Insurance Act also requires these Bermuda insurance subsidiaries of the Company to maintain certain measures of solvency and liquidity. At December 31, 2012, the statutory capital and surplus of the Company's Bermuda insurance subsidiaries was $3.1 billion (2011 – $2.7 billion) and the minimum amount required to be maintained under Bermuda law, the Minimum Solvency Margin, was $554.8 million (2011 – $552.9 million).

Under the Insurance Act, Glencoe is defined as a Class 3A insurer, and Renaissance Reinsurance and DaVinci are classified as Class 4 insurers, and therefore must maintain capital at a level equal to its enhanced capital requirement ("ECR") which is established by reference to the Bermuda Solvency Capital Requirement ("BSCR") model. The BSCR is a standard mathematical model designed to give the Bermuda Monetary Authority ("BMA") more advanced methods for determining an insurer's capital adequacy. Underlying the BSCR is the belief that all insurers should operate on an ongoing basis with a view to maintaining their capital at a prudent level in excess of the minimum solvency margin otherwise prescribed under the Insurance Act. Alternatively, under the Insurance Act, insurers may, subject to the terms of the Insurance Act and to the BMA's oversight, elect to utilize an approved internal capital model to determine regulatory capital. In either case, the ECR shall at all times equal or exceed the respective Class 3A and Class 4 insurer's Minimum Solvency Margin and may be adjusted in circumstances where the BMA concludes that the insurer's risk profile deviates significantly from the assumptions underlying its ECR or the insurer's assessment of its risk management policies and practices used to calculate the ECR applicable to it. While not specifically referred to in the Insurance Act, the BMA has also established a target capital level ("TCL") for each Class 3A and Class 4 insurer equal to 120% of its respective ECR. While a Class 3A and Class 4 insurer is not currently required to maintain its statutory capital and surplus at this level, the TCL serves as an early warning tool for the BMA and failure to maintain statutory capital at least equal to the TCL will likely result in increased BMA regulatory oversight.

Class 3A and Class 4 insurers are prohibited from declaring or paying any dividends if in breach of the required Minimum Solvency Margin or Minimum Liquidity Ratio (the "Relevant Margins") or if the declaration or payment of such dividend would cause the insurer to fail to meet the Relevant Margins. Where an insurer fails to meet its Relevant Margins on the last day of any financial year, it is prohibited from declaring or paying any dividends during the next financial year without the prior approval of the BMA. Further, a Class 4 insurer is prohibited from declaring or paying in any financial year dividends of more than 25% of its total statutory capital and surplus (as shown on its previous financial year's statutory balance sheet) unless it files (at least seven days before payment of such dividends) with the BMA an affidavit stating that it will continue to meet its Relevant Margins. Class 3A and Class 4 insurers must obtain the BMA's prior approval for a reduction by 15% or more of the total statutory capital as set forth in its previous year's financial statements. These restrictions on declaring or paying dividends and distributions under the Insurance Act are in addition to the solvency requirements under the Companies Act which apply to all Bermuda companies.

During 2012, Renaissance Reinsurance, DaVinci and Glencoe declared aggregate cash dividends of $482.0 million, $108.0 million, and $Nil, respectively (2011 – $180.7 million, $6.8 million and $15.9 million, respectively). In addition, Glencoe returned capital of $Nil during 2012 (2011 - $234.1 million).

In addition, Glencoe is also eligible as an excess and surplus lines insurer in a number of states in the U.S. and under the various capital and surplus requirements in these states is required to maintain a minimum amount of capital and surplus. In this regard, the declaration of dividends from retained earnings and distributions from additional paid-in capital are limited to the extent that the above requirement is met.

The Company is currently completing its 2012 Bermuda-based statutory filings for Renaissance Reinsurance, DaVinci and Glencoe, which must be filed with the BMA on or before April 30, 2013, and at this time, the Company believes each of Renaissance Reinsurance, DaVinci and Glencoe will exceed the target level of required statutory capital.

Syndicate 1458

RenaissanceRe CCL and Syndicate 1458 are subject to oversight by the Council of Lloyd's. RSML is subject to regulation by the Financial Services Authority ("FSA") under the Financial Services and Markets Act 2000. Underwriting capacity of a member of Lloyd's must be supported by providing a deposit in the form of cash, securities or letters of credit, which are referred to as Funds at Lloyd's ("FAL"). This amount is determined by Lloyd's and is based on Syndicate 1458's solvency and capital requirement as calculated through its internal model. In addition, if the FAL are not sufficient to cover all losses, the Lloyd's Central Fund provides an additional level of security for policyholders. At December 31, 2012, the FAL requirement set by Lloyd's for Syndicate 1458 is £183.2 million based on its business plan, approved in November 2012 (2011 – £93.8 million based on its business plan, approved November 2011). Actual FAL posted for Syndicate 1458 at December 31, 2012 by RenaissanceRe CCL is $222.0 million and £45.5 million supported 100% by letters of credit (2011 – $118.5 million and £24.5 million).

Multi-Beneficiary Reinsurance Trusts

Effective March 15, 2011, each of Renaissance Reinsurance and DaVinci was approved as a Trusteed Reinsurer in the state of New York and established a multi-beneficiary reinsurance trust ("MBRT") to collateralize its (re)insurance liabilities associated with U.S. domiciled cedants. The MBRTs are subject to the rules and regulations of the state of New York and the respective deed of trust, including but not limited to certain minimum capital funding requirements, investment guidelines, capital distribution restrictions and regulatory reporting requirements. Assets held under trust at December 31, 2012 with respect to the MBRTs totaled $508.7 million and $180.1 million for Renaissance Reinsurance and DaVinci, respectively (2011 – $450.8 million and $101.9 million, respectively), compared to the minimum amount required under U.S. state regulations of $494.9 million and $169.1 million, respectively (2011 – $274.5 million and $73.9 million, respectively).

Multi-Beneficiary Reduced Collateral Reinsurance Trusts

Effective December 31, 2012, each of Renaissance Reinsurance and DaVinci was approved as an Accredited Reinsurer in the state of New York and established a multi-beneficiary reduced collateral reinsurance trust ("RCT") to collateralize its (re)insurance liabilities associated with U.S. domiciled cedants in certain states where Renaissance Reinsurance or DaVinci are approved as an Accredited Reinsurer, thereby providing for a reduction in collateral requirements to 20% of the net outstanding insurance liabilities. The RCTs are subject to the rules and regulations of the state of New York and the respective deed of trust, including but not limited to certain minimum capital funding requirements, investment guidelines, capital distribution restrictions and regulatory reporting requirements. Assets held under trust at December 31, 2012 with respect to the RCTs totaled $11.0 million and $11.0 million for Renaissance Reinsurance and DaVinci, respectively, compared to the minimum amount required under U.S. state regulations of $10.0 million and $10.0 million, respectively.