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Noncontrolling Interests (Schedule Of Redeemable Noncontrolling Interest) (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014
Activity in redeemable noncontrolling interest |  |  |
Beginning balance | $ 1,131,708 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount |  |
Net income attributable to redeemable noncontrolling interest | 39,662 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest | 42,768 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest |
Ending balance | 968,431 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount |  |
DaVinciRe |  |  |
Activity in redeemable noncontrolling interest |  |  |
Beginning balance | 1,037,306 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_DavincireMember | 1,063,368 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_DavincireMember | 1,063,368 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_DavincireMember
Redemption of shares from redeemable noncontrolling interest | (207,898)us-gaap_MinorityInterestDecreaseFromRedemptions / dei_LegalEntityAxis = rnr_DavincireMember | (218,879)us-gaap_MinorityInterestDecreaseFromRedemptions / dei_LegalEntityAxis = rnr_DavincireMember |
Sale of shares to redeemable noncontrolling interests | 0 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_DavincireMember | 9,722 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_DavincireMember |
Net income attributable to redeemable noncontrolling interest | 38,326 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / dei_LegalEntityAxis = rnr_DavincireMember | 41,180 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / dei_LegalEntityAxis = rnr_DavincireMember |
Ending balance | 867,734 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_DavincireMember | 895,391 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_DavincireMember |
Medici |  |  |
Activity in redeemable noncontrolling interest |  |  |
Beginning balance | 94,402 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_MediciMember | 36,492 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_MediciMember | 36,492 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_MediciMember
Redemption of shares from redeemable noncontrolling interest | (14,684)us-gaap_MinorityInterestDecreaseFromRedemptions / dei_LegalEntityAxis = rnr_MediciMember | (1,875)us-gaap_MinorityInterestDecreaseFromRedemptions / dei_LegalEntityAxis = rnr_MediciMember | (3,100)us-gaap_MinorityInterestDecreaseFromRedemptions / dei_LegalEntityAxis = rnr_MediciMember
Sale of shares to redeemable noncontrolling interests | 19,643 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_MediciMember | 55,385 us-gaap_ConsolidationLessThanWhollyOwnedSubsidiaryParentOwnershipInterestChangesIssuanceOfEquityBySubsidiaryToNoncontrollingInterests / dei_LegalEntityAxis = rnr_MediciMember |
Net income attributable to redeemable noncontrolling interest | 1,336 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / dei_LegalEntityAxis = rnr_MediciMember | 1,588 us-gaap_NetIncomeLossAttributableToRedeemableNoncontrollingInterest / dei_LegalEntityAxis = rnr_MediciMember |
Ending balance | $ 100,697 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_MediciMember | $ 91,590 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_MediciMember | $ 94,402 us-gaap_RedeemableNoncontrollingInterestEquityCarryingAmount / dei_LegalEntityAxis = rnr_MediciMember

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- Definition Represents a sale (new stock issuance) by a subsidiary to noncontrolling interests (third parties, parties directly or indirectly unrelated to parent) during the period. The capital transaction by subsidiary does not result in a loss of control by the parent, but does effect a change in total (consolidated) equity attributable to the parent. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=18733093&loc=SL4573702-111684 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 55 -Paragraph 4M -URI http://asc.fasb.org/extlink&oid=35736750&loc=SL4591554-111686 + Details
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- Definition Decrease in noncontrolling interest (for example, but not limited to, redeeming or purchasing the interests of noncontrolling shareholders, issuance of shares (interests) by the non-wholly owned subsidiary to the parent entity for other than cash, and a buyback of shares (interest) by the non-wholly owned subsidiary from the noncontrolling interests). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4569655-111683 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=7656940&loc=SL4616395-111683 + Details
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- Definition As of the reporting date, the aggregate carrying amount of all noncontrolling interests which are redeemable by the (parent) entity (1) at a fixed or determinable price on a fixed or determinable date, (2) at the option of the holder of the noncontrolling interest, or (3) upon occurrence of an event that is not solely within the control of the (parent) entity. This item includes noncontrolling interest holder's ownership (or holders' ownership) regardless of the type of equity interest (common, preferred, other) including all potential organizational (legal) forms of the investee entity. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=27011957&loc=SL6540498-122764 + Details
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