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Condensed Consolidating Financial Information Provided in Connection with Outstanding Debt of Subsidiaries (Condensed Consolidating Statement of Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Condensed Financial Statements, Captions [Line Items] |  |
Net income | $ 353,128 | $ 92,207
Change in net unrealized losses on investments | (37) | (30)
Comprehensive income | 353,091 | 92,177
Net (income) loss attributable to redeemable noncontrolling interests | (70,222) | (29,899)
Comprehensive (income) loss attributable to redeemable noncontrolling interests | (70,222) | (29,899)
Comprehensive income attributable to RenaissanceRe | 282,869 | 62,278
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer) |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net income | 7,766 | 272
Change in net unrealized losses on investments | 0 | 0
Comprehensive income | 7,766 | 272
Net (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive income attributable to RenaissanceRe | 7,766 | 272
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer) |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net income | 16,743 | (20,134)
Change in net unrealized losses on investments | 0 | 0
Comprehensive income | 16,743 | (20,134)
Net (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive income attributable to RenaissanceRe | 16,743 | (20,134)
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor) |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net income | 282,906 | 62,308
Change in net unrealized losses on investments | 0 | 0
Comprehensive income | 282,906 | 62,308
Net (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive income attributable to RenaissanceRe | 282,906 | 62,308
Reportable Legal Entities | Other RenaissanceRe Holdings Ltd. Subsidiaries and Eliminations (Non-Guarantor Subsidiaries) |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net income | 395,156 | 106,657
Change in net unrealized losses on investments | (37) | (30)
Comprehensive income | 395,119 | 106,627
Net (income) loss attributable to redeemable noncontrolling interests | (70,222) | (29,899)
Comprehensive (income) loss attributable to redeemable noncontrolling interests | (70,222) | (29,899)
Comprehensive income attributable to RenaissanceRe | 324,897 | 76,728
Consolidating Adjustments |  |
Condensed Financial Statements, Captions [Line Items] |  |
Net income | (349,443) | (56,896)
Change in net unrealized losses on investments | 0 | 0
Comprehensive income | (349,443) | (56,896)
Net (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive (income) loss attributable to redeemable noncontrolling interests | 0 | 0
Comprehensive income attributable to RenaissanceRe | $ (349,443) | $ (56,896)

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