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Statutory Requirements (Tables) | 12 Months Ended
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Dec. 31, 2017
Insurance [Abstract] |
Schedule of Actual and Required Statutory Capital and Surplus | The statutory capital and surplus, required minimum statutory capital and surplus and unrestricted net assets of the Company’s regulated insurance operations in its most significant regulatory jurisdictions are detailed below:
|  | Bermuda (1) |  | U.S. |  | U.K. (2) (3) |
| At December 31, | 2017 |  | 2016 |  | 2017 |  | 2016 |  | 2017 |  | 2016 |
| Statutory capital and surplus | $ | 4,155,440 |  |  | $ | 4,212,374 |  |  | $ | 523,384 |  |  | $ | 523,340 |  |  | $ | 527,325 |  |  | $ | 491,213 |  |
| Required statutory capital and surplus | 824,545 |  |  | 788,437 |  |  | 306,375 |  |  | 221,023 |  |  | 527,325 |  |  | 491,213 |  |
| Unrestricted net assets | 790,177 |  |  | 867,624 |  |  | 24,109 |  |  | 25,375 |  |  | — |  |  | — |  |
(1) | The Company's Bermuda-domiciled insurance subsidiaries’ capital and surplus is based on the relevant insurer’s statutory financial statements and required statutory capital and surplus is based on the MSM.
(2) | With respect to statutory capital and surplus and required statutory capital and surplus, and as described below, 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”). FAL is determined by Lloyd’s and is based on Syndicate 1458’s solvency and capital requirements as calculated through its internal model.
(3) | Syndicate 1458 is capitalized by its FAL, with the related assets not held on its balance sheet. As such, unrestricted net assets is not applicable to Syndicate 1458; however, the Company can make an application to obtain approval from Lloyd’s to have funds released to RenaissanceRe from Syndicate 1458, subject to passing a Lloyd’s release test.
Schedule of Statutory Net (Loss) Income | Statutory net (loss) income of the Company’s regulated insurance operations in its most significant regulatory jurisdictions are detailed below:
|  | Statutory Net (Loss) Income |
|  | Bermuda |  | U.S. |  | U.K. |
| Year ended December 31, 2017 | $ | (334,142 | ) |  | $ | (3,627 | ) |  | $ | (57,050 | ) |
| Year ended December 31, 2016 | 625,371 |  |  | 43,292 |  |  | 28,007 |  |
| Year ended December 31, 2015 | 355,132 |  |  | 58,752 |  |  | 1,627 |  |

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