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Debt and Credit Facilities (Schedule of Carrying Values and Estimated Fair Values of Debt Instruments) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Apr. 02, 2019	Jun. 29, 2017	May 04, 2015	Mar. 24, 2015
Debt Instrument [Line Items]
Long-term debt	$ 1,300,000	$ 1,300,000
Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	1,268,443	1,261,069
Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	1,168,353	1,136,265
3.600% Senior Notes due 2029
Debt Instrument [Line Items]
Interest rate			3.60%
3.450% Senior Notes due 2027
Debt Instrument [Line Items]
Interest rate				3.45%
3.700% Senior Notes due 2025
Debt Instrument [Line Items]
Interest rate						3.70%
DaVinciRe Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinciRe)
Debt Instrument [Line Items]
Interest rate					4.75%
Senior Notes | RenaissanceRe Finance, Inc. | 3.600% Senior Notes due 2029 | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	432,316	453,932
Senior Notes | RenaissanceRe Finance, Inc. | 3.600% Senior Notes due 2029 | Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	393,305	392,391
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	321,204	329,661
Senior Notes | RenaissanceRe Finance, Inc. | 3.450% Senior Notes due 2027 | Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	297,281	296,787
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	318,852	315,273
Senior Notes | RenaissanceRe Finance, Inc. | 3.700% Senior Notes due 2025 | Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	298,798	298,428
Senior Notes | DaVinciRe Holdings Ltd. | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	1,238,443	1,261,069
Senior Notes | DaVinciRe Holdings Ltd. | Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	1,138,353	1,136,265
Senior Notes | DaVinciRe Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinciRe) | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	166,071	162,203
Senior Notes | DaVinciRe Holdings Ltd. | 4.750% Senior Notes due 2025 (DaVinciRe) | Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	148,969	148,659
Line of Credit | DaVinciRe Holdings Ltd. | Estimate of Fair Value Measurement
Debt Instrument [Line Items]
Long-term debt	30,000	0
Line of Credit | DaVinciRe Holdings Ltd. | Reported Value Measurement
Debt Instrument [Line Items]
Long-term debt	$ 30,000	$ 0

X

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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- Definition

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+ References

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