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Condensed Consolidating Financial Information Provided In Connection With Outstanding Debt Of Subsidiaries (Condensed Consolidating Statement of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Condensed Financial Statements, Captions [Line Items]
Net income (loss)	$ 125,869	$ 112,277	$ 90,996	$ 213,100	$ 220,577	$ 103,887	$ 162,426	$ 199,366	$ 542,242	$ 686,256	$ 841,768
Change in net unrealized gains on investments									(1,308)	(715)	(9,491)
Comprehensive income									540,934	685,541	832,277
Net income attributable to noncontrolling interests									(111,050)	(153,538)	(151,144)
Comprehensive income attributable to noncontrolling interests									(111,050)	(153,538)	(151,144)
Comprehensive income attributable to RenaissanceRe									429,884	532,003	681,133
RenaissanceRe Holdings Ltd. (Parent Guarantor)
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									431,192	532,718	690,624
Change in net unrealized gains on investments									0	0	0
Comprehensive income									431,192	532,718	690,624
Net income attributable to noncontrolling interests									0	0	0
Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive income attributable to RenaissanceRe									431,192	532,718	690,624
RenRe North America Holdings Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									27,209	(327)	(23,853)
Change in net unrealized gains on investments									0	0	0
Comprehensive income									27,209	(327)	(23,853)
Net income attributable to noncontrolling interests									0	0	0
Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive income attributable to RenaissanceRe									27,209	(327)	(23,853)
Platinum Underwriters Finance, Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									33,849
Change in net unrealized gains on investments									0
Comprehensive income									33,849
Net income attributable to noncontrolling interests									0
Comprehensive income attributable to noncontrolling interests									0
Comprehensive income attributable to RenaissanceRe									33,849
RenaissanceRe Finance, Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									61,429
Change in net unrealized gains on investments									0
Comprehensive income									61,429
Net income attributable to noncontrolling interests									0
Comprehensive income attributable to noncontrolling interests									0
Comprehensive income attributable to RenaissanceRe									61,429
Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries)
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									579,273	709,600	894,031
Change in net unrealized gains on investments									(1,308)	(715)	(9,491)
Comprehensive income									577,965	708,885	884,540
Net income attributable to noncontrolling interests									(111,050)	(153,538)	(151,144)
Comprehensive income attributable to noncontrolling interests									(111,050)	(153,538)	(151,144)
Comprehensive income attributable to RenaissanceRe									466,915	555,347	733,396
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net income (loss)									(590,710)	(555,735)	(719,034)
Change in net unrealized gains on investments									0	0	0
Comprehensive income									(590,710)	(555,735)	(719,034)
Net income attributable to noncontrolling interests									0	0	0
Comprehensive income attributable to noncontrolling interests									0	0	0
Comprehensive income attributable to RenaissanceRe									$ (590,710)	$ (555,735)	$ (719,034)