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Noncontrolling Interests (Details) - USD ($) $ in Thousands |  | 3 Months Ended | 9 Months Ended |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 01, 2019 | Sep. 30, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Sep. 30, 2019 | Sep. 30, 2018 | Jun. 30, 2019 | Jun. 30, 2018 | Dec. 31, 2017
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interests |  | $ 2,779,033 | $ 2,051,700 |  | $ 2,779,033 |  |  |  |
Net income attributable to redeemable noncontrolling interests |  | $ 62,057 |  | $ 6,440 | $ 204,091 | $ 90,822 |  |  |
DaVinci Reinsurance Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Parent company ownership in redeemable noncontrolling interest | 21.90% | 21.90% | 22.10% |  | 21.90% |  |  |  |
Sale of equity interest | $ 11,600 |  |  |  |  |  |  |  |
RenaissanceRe Medici Fund Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Parent company ownership in redeemable noncontrolling interest |  | 13.70% | 15.80% |  | 13.70% |  |  |  |
DaVinciRe Holdings Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interests |  | $ 1,462,677 | $ 1,034,946 | 1,085,985 | $ 1,462,677 | 1,085,985 | $ 1,431,101 | $ 1,082,425 | $ 1,011,659
Net income attributable to redeemable noncontrolling interests |  | 30,558 |  | 3,730 | 152,946 | 74,935 |  |  |
Sale of shares to redeemable noncontrolling interest | 349,200 | 0 |  | 0 | 274,699 | 0 |  |  |
Redemption of shares from redeemable noncontrolling interest |  | $ (1,018) |  | 170 | $ (86) | 609 |  |  |
DaVinciRe Holdings Ltd. | Maximum |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Share repurchase requests, limit |  | 25.00% |  |  | 25.00% |  |  |  |
RenaissanceRe Medici Fund Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interests |  | $ 534,618 | 416,765 | 447,993 | $ 534,618 | 447,993 | 515,915 | 411,003 | 284,847
Net income attributable to redeemable noncontrolling interests |  | 15,211 |  | 2,710 | 19,396 | 15,887 |  |  |
Sale of shares to redeemable noncontrolling interest |  | 10,500 |  | 43,000 | $ 142,905 | 199,482 |  |  |
Redemption provision, notice period |  |  |  |  | 30 days |  |  |  |
Redemption of shares from redeemable noncontrolling interest |  | 7,008 |  | 8,720 | $ 44,448 | 52,223 |  |  |
Vermeer Reinsurance Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Redeemable noncontrolling interests |  | 781,738 | 599,989 | 0 | 781,738 | 0 | $ 765,450 | $ 0 | $ 0
Net income attributable to redeemable noncontrolling interests |  | 16,288 |  | 0 | 31,749 | 0 |  |  |
Sale of shares to redeemable noncontrolling interest |  | $ 0 |  | $ 0 | 150,000 | $ 0 |  |  |
Participating, Non-voting Common Shares | Vermeer Reinsurance Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Sale of shares to redeemable noncontrolling interest |  |  | 600,000 |  | $ 150,000 |  |  |  |
Voting, Non-participating Shares | Vermeer Reinsurance Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Sale of shares to redeemable noncontrolling interest |  |  | $ 1 |  |  |  |  |  |
Third-Party Investors | DaVinciRe Holdings Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Sale of shares to redeemable noncontrolling interest | 263,100 |  |  |  |  |  |  |  |
RenaissanceRe Holdings Ltd. | DaVinciRe Holdings Ltd. |  |  |  |  |  |  |  |  |
Redeemable Noncontrolling Interest [Line Items] |  |  |  |  |  |  |  |  |
Sale of shares to redeemable noncontrolling interest | $ 86,100 |  |  |  |  |  |  |  |

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- Definition This item limits the aggregate of all share repurchase requests to 25% of DaVinciRe's capital in any given year and satisfying all applicable regulatory requirements. If total shareholder requests exceed 25% of DaVinciRe's capital, the number of shares repurchased will be reduced among the requesting shareholders pro-rata, based on the amounts desired to be repurchased. + References No definition available. + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569655-111683 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 24 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4616395-111683 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + Details
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- Definition Amount of Net Income (Loss) attributable to redeemable noncontrolling interest. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.19) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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- Definition Amount of increase in noncontrolling interest from subsidiary issuance of equity interests to noncontrolling interest holders. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=109239629&loc=SL4573702-111684 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 810 -SubTopic 10 -Section 45 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=108774443&loc=SL4569655-111683 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -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 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (16)(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 15 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph (12)(c) -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 480 -SubTopic 10 -Section S99 -Paragraph 3A -Subparagraph 14 -URI http://asc.fasb.org/extlink&oid=65877616&loc=SL6540498-122764 + Details
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