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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, 2016	Mar. 31, 2015
Condensed Financial Statements, Captions [Line Items]
Net income	$ 178,181	$ 213,100
Change in net unrealized gains on investments	(443)	(74)
Comprehensive income	177,738	213,026
Net income attributable to redeemable noncontrolling interests	(44,591)	(39,662)
Comprehensive income attributable to noncontrolling interests	(44,591)	(39,662)
Comprehensive income attributable to RenaissanceRe	133,147	173,364
RenaissanceRe Holdings Ltd. (Parent Guarantor)
Condensed Financial Statements, Captions [Line Items]
Net income	133,590	173,438
Change in net unrealized gains on investments	0	0
Comprehensive income	133,590	173,438
Net income attributable to redeemable noncontrolling interests	0	0
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to RenaissanceRe	133,590	173,438
RenRe North America Holdings Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	1,071	29,553
Change in net unrealized gains on investments	0	0
Comprehensive income	1,071	29,553
Net income attributable to redeemable noncontrolling interests	0	0
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to RenaissanceRe	1,071	29,553
Platinum Underwriters Finance, Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	23,860	183
Change in net unrealized gains on investments	0	0
Comprehensive income	23,860	183
Net income attributable to redeemable noncontrolling interests	0	0
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to RenaissanceRe	23,860	183
RenaissanceRe Finance, Inc. (Subsidiary Issuer)
Condensed Financial Statements, Captions [Line Items]
Net income	13,946	43,781
Change in net unrealized gains on investments	0	0
Comprehensive income	13,946	43,781
Net income attributable to redeemable noncontrolling interests	0	0
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to RenaissanceRe	13,946	43,781
Other RenaissanceRe Holdings Ltd. Subsidiaries And Eliminations (Non-Guarantor Subsidiaries)
Condensed Financial Statements, Captions [Line Items]
Net income	176,596	216,922
Change in net unrealized gains on investments	(443)	(74)
Comprehensive income	176,153	216,848
Net income attributable to redeemable noncontrolling interests	(44,591)	(39,662)
Comprehensive income attributable to noncontrolling interests	(44,591)	(39,662)
Comprehensive income attributable to RenaissanceRe	131,562	177,186
Consolidating Adjustments
Condensed Financial Statements, Captions [Line Items]
Net income	(170,882)	(250,777)
Change in net unrealized gains on investments	0	0
Comprehensive income	(170,882)	(250,777)
Net income attributable to redeemable noncontrolling interests	0	0
Comprehensive income attributable to noncontrolling interests	0	0
Comprehensive income attributable to RenaissanceRe	$ (170,882)	$ (250,777)

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