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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		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Condensed Financial Statements, Captions [Line Items]
Net income	$ 172,556	$ 90,996	$ 350,737	$ 304,096
Change in net unrealized gains on investments	672	(349)	229	(423)
Comprehensive income	173,228	90,647	350,966	303,673
Net income attributable to redeemable noncontrolling interests	(30,635)	(12,167)	(75,226)	(51,829)
Comprehensive income attributable to noncontrolling interests	(30,635)	(12,167)	(75,226)	(51,829)
Comprehensive income attributable to RenaissanceRe	142,593	78,480	275,740	251,844
Reportable Legal Entities | RenaissanceRe Holdings Ltd. (Parent Guarantor)
Condensed Financial Statements, Captions [Line Items]
Net income	141,921	78,829	275,511	252,267
Change in net unrealized gains on investments	0	0	0	0
Comprehensive income	141,921	78,829	275,511	252,267
Net income attributable to redeemable noncontrolling interests	0	0	0	0
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to RenaissanceRe	141,921	78,829	275,511	252,267
Reportable Legal Entities | RenRe North America Holdings Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	2,097	(573)	3,168	28,980
Change in net unrealized gains on investments	0	0	0	0
Comprehensive income	2,097	(573)	3,168	28,980
Net income attributable to redeemable noncontrolling interests	0	0	0	0
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to RenaissanceRe	2,097	(573)	3,168	28,980
Reportable Legal Entities | Platinum Underwriters Finance, Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	13,967	5,620	37,827	5,803
Change in net unrealized gains on investments	0	0	0	0
Comprehensive income	13,967	5,620	37,827	5,803
Net income attributable to redeemable noncontrolling interests	0	0	0	0
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to RenaissanceRe	13,967	5,620	37,827	5,803
Reportable Legal Entities | RenaissanceRe Finance, Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	8,974	3,101	22,920	46,882
Change in net unrealized gains on investments	0	0	0	0
Comprehensive income	8,974	3,101	22,920	46,882
Net income attributable to redeemable noncontrolling interests	0	0	0	0
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to RenaissanceRe	8,974	3,101	22,920	46,882
Reportable Legal Entities | Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries)
Condensed Financial Statements, Captions [Line Items]
Net income	181,077	104,800	357,673	321,722
Change in net unrealized gains on investments	672	(349)	229	(423)
Comprehensive income	181,749	104,451	357,902	321,299
Net income attributable to redeemable noncontrolling interests	(30,635)	(12,167)	(75,226)	(51,829)
Comprehensive income attributable to noncontrolling interests	(30,635)	(12,167)	(75,226)	(51,829)
Comprehensive income attributable to RenaissanceRe	151,114	92,284	282,676	269,470
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net income	(175,480)	(100,781)	(346,362)	(351,558)
Change in net unrealized gains on investments	0	0	0	0
Comprehensive income	(175,480)	(100,781)	(346,362)	(351,558)
Net income attributable to redeemable noncontrolling interests	0	0	0	0
Comprehensive income attributable to noncontrolling interests	0	0	0	0
Comprehensive income attributable to RenaissanceRe	$ (175,480)	$ (100,781)	$ (346,362)	$ (351,558)

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