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Debt and Credit Facilities Debt and Credit Facilities (Summary of Debt Obligations) (Details) (USD $) In Thousands, unless otherwise specified | Mar. 31, 2015 | Dec. 31, 2014
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Debt Instrument [Line Items] |  |
Debt | $ 826,774 us-gaap_LongTermDebt | $ 249,522 us-gaap_LongTermDebt
RenRe North America Holdings Inc. |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | 863,566 us-gaap_LongTermDebtFairValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 279,000 us-gaap_LongTermDebtFairValue / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
RenRe North America Holdings Inc. | 5.75% Senior Notes Due March 15, 2020 |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | 285,000 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = rnr_A5.75SeniorNotesDueMarch152020Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 279,000 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = rnr_A5.75SeniorNotesDueMarch152020Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Debt | 249,545 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = rnr_A5.75SeniorNotesDueMarch152020Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 249,522 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = rnr_A5.75SeniorNotesDueMarch152020Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
RenRe North America Holdings Inc. | 3.700% Senior Notes Due April 1, 2025 |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | 300,450 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = rnr_A3.700SeniorNotesDueApril12025Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = rnr_A3.700SeniorNotesDueApril12025Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Debt | 299,400 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = rnr_A3.700SeniorNotesDueApril12025Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = rnr_A3.700SeniorNotesDueApril12025Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
RenRe North America Holdings Inc. | Series B 7.50% Notes Due June 1, 2017 |  |
Debt Instrument [Line Items] |  |
Long-term Debt, Fair Value | 278,116 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = rnr_SeriesB7.50NotesDueJune12017Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | 0 us-gaap_LongTermDebtFairValue / us-gaap_DebtInstrumentAxis = rnr_SeriesB7.50NotesDueJune12017Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember
Debt | $ 277,829 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = rnr_SeriesB7.50NotesDueJune12017Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember | $ 0 us-gaap_LongTermDebt / us-gaap_DebtInstrumentAxis = rnr_SeriesB7.50NotesDueJune12017Member / dei_LegalEntityAxis = us-gaap_SubsidiariesMember

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- Definition Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 7 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.22) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 16 -Article 9 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 20, 22 -Article 5 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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