XML 106 R91.htm IDEA: XBRL DOCUMENT v3.22.0.1

Reserve for Claims and Claim Expenses (Schedule of Incurred and Paid Claims Development) (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		$ 19,054,274
IBNR and ACR	$ 6,438,015
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		10,353,691
Outstanding liabilities from accident year 2011 and prior, net of reinsurance		341,797
Adjustment for unallocated loss adjustment expenses		61,251
Unamortized fair value adjustments recorded in connection with acquisitions		(77,670)
Liability for claims and claim expenses, net of reinsurance		9,025,961
Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		8,518,921
IBNR and ACR	2,734,172
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		4,783,891
Outstanding liabilities from accident year 2011 and prior, net of reinsurance		89,538
Adjustment for unallocated loss adjustment expenses		16,266
Unamortized fair value adjustments recorded in connection with acquisitions		(11,642)
Liability for claims and claim expenses, net of reinsurance		3,829,192
Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		10,535,353
IBNR and ACR	3,703,843
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		5,569,800
Outstanding liabilities from accident year 2011 and prior, net of reinsurance		252,259
Adjustment for unallocated loss adjustment expenses		44,985
Unamortized fair value adjustments recorded in connection with acquisitions		(66,028)
Liability for claims and claim expenses, net of reinsurance		5,196,769
Accident Year 2012
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		893,612	$ 894,228	$ 911,821	$ 907,765	$ 901,147	$ 899,241	$ 927,397	$ 958,667	$ 1,022,338	$ 1,138,478
IBNR and ACR	28,520
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		808,734	792,519	785,271	754,527	723,431	648,754	597,103	522,714	417,140	267,808
Accident Year 2012 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		322,871	325,042	334,347	338,877	346,756	358,509	375,439	395,605	429,885	560,348
IBNR and ACR	1,180
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		318,295	314,720	314,418	309,133	306,718	291,901	280,519	254,000	205,814	165,951
Accident Year 2012 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		570,741	569,186	577,474	568,888	554,391	540,732	551,958	563,062	592,453	578,130
IBNR and ACR	27,340
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		490,439	477,799	470,853	445,394	416,713	356,853	316,584	268,714	211,326	$ 101,857
Accident Year 2013
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		726,277	720,503	726,212	747,939	766,453	790,498	836,813	887,176	912,458
IBNR and ACR	16,529
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		648,716	633,689	617,109	589,784	556,485	497,296	434,633	341,769	132,207
Accident Year 2013 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		240,779	238,404	235,356	235,016	238,734	250,014	272,191	294,315	318,033
IBNR and ACR	1,113
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		226,353	226,035	221,255	218,446	215,758	207,963	192,225	156,204	80,397
Accident Year 2013 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		485,498	482,099	490,856	512,923	527,719	540,484	564,622	592,861	594,425
IBNR and ACR	15,416
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		422,363	407,654	395,854	371,338	340,727	289,333	242,408	185,565	$ 51,810
Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		888,622	897,645	932,269	922,659	941,733	965,706	974,640	1,002,755
IBNR and ACR	57,970
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		788,590	767,927	741,271	694,155	633,294	557,091	435,331	231,084
Accident Year 2014 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		247,708	250,647	256,845	259,379	260,542	265,569	278,813	302,158
IBNR and ACR	372
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		246,690	243,885	244,721	241,266	234,933	223,197	184,711	106,781
Accident Year 2014 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		640,914	646,998	675,424	663,280	681,191	700,137	695,827	700,597
IBNR and ACR	57,598
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		541,900	524,042	496,550	452,889	398,361	333,894	250,620	$ 124,303
Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,111,987	1,117,250	1,105,473	1,130,597	1,161,202	1,144,947	1,139,588
IBNR and ACR	73,388
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		982,966	934,337	870,708	775,007	660,456	496,234	262,301
Accident Year 2015 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		295,081	305,847	311,964	323,211	334,099	357,065	372,338
IBNR and ACR	71
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		294,651	292,033	288,678	278,452	260,858	226,722	126,972
Accident Year 2015 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		816,906	811,403	793,509	807,386	827,103	787,882	767,250
IBNR and ACR	73,317
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		688,315	642,304	582,030	496,555	399,598	269,512	$ 135,329
Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,373,871	1,366,532	1,420,715	1,447,703	1,464,953	1,418,381
IBNR and ACR	59,360
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		1,184,679	1,087,441	973,074	831,642	625,995	287,753
Accident Year 2016 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		411,698	415,572	434,706	452,922	469,120	455,503
IBNR and ACR	16,889
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		384,932	374,160	351,523	327,034	259,131	120,506
Accident Year 2016 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		962,173	950,960	986,009	994,781	995,833	962,878
IBNR and ACR	42,471
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		799,747	713,281	621,551	504,608	366,864	$ 167,247
Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		2,559,381	2,603,328	2,664,387	2,748,704	2,954,415
IBNR and ACR	342,654
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		1,905,621	1,735,535	1,370,642	1,073,216	747,272
Accident Year 2017 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,273,461	1,328,419	1,350,684	1,461,953	1,644,982
IBNR and ACR	217,210
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		972,239	946,934	820,148	663,381	534,631
Accident Year 2017 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,285,920	1,274,909	1,313,703	1,286,751	1,309,433
IBNR and ACR	125,444
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		933,382	788,601	550,494	409,835	$ 212,641
Accident Year 2018
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		2,188,749	2,297,920	2,342,952	2,198,790
IBNR and ACR	371,723
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		1,452,144	1,172,692	800,773	590,671
Accident Year 2018 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		857,217	979,598	1,020,102	938,309
IBNR and ACR	105,483
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		638,149	611,268	439,783	434,358
Accident Year 2018 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,331,532	1,318,322	1,322,850	1,260,481
IBNR and ACR	266,240
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		813,995	561,424	360,990	$ 156,313
Accident Year 2019
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		2,154,462	2,213,257	2,255,467
IBNR and ACR	834,344
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		986,835	692,429	285,660
Accident Year 2019 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		898,472	956,445	992,526
IBNR and ACR	254,099
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		526,314	364,761	160,141
Accident Year 2019 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,255,990	1,256,812	1,262,941
IBNR and ACR	580,245
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		460,521	327,668	$ 125,519
Accident Year 2020
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		3,076,722	3,090,954
IBNR and ACR	1,562,397
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		1,023,330	410,482
Accident Year 2020 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,600,743	1,580,564
IBNR and ACR	585,134
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		676,472	255,268
Accident Year 2020 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,475,979	1,510,390
IBNR and ACR	977,263
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		346,858	$ 155,214
Accident Year 2021
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		4,080,591
IBNR and ACR	3,091,130
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		572,076
Accident Year 2021 | Property
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		2,370,891
IBNR and ACR	1,552,621
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		499,796
Accident Year 2021 | Casualty and Specialty
Claims Development [Line Items]
Incurred Claims and Claim Expenses, Net of Reinsurance		1,709,700
IBNR and ACR	$ 1,538,509
Cumulative Paid Claims and Claim Expenses, Net of Reinsurance		$ 72,280

X

- Definition

Short-duration Insurance Contracts, Liability for Unpaid Claims and Claim Adjustment Expense, Unamortized Fair Value Adjustments Associated With Acquisition

+ References

No definition available.

+ Details

Name:	rnr_ShortdurationInsuranceContractsLiabilityforUnpaidClaimsandClaimAdjustmentExpenseUnamortizedFairValueAdjustmentsAssociatedWithAcquisition
Namespace Prefix:	rnr_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ClaimsDevelopmentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount, after reinsurance, of paid claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsCumulativePaidClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

Undiscounted amount, after reinsurance, of incurred-but-not-reported (IBNR) liabilities plus expected development on reported claims, for claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4E
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671321-158438

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4D
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671317-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsIncurredButNotReportedIbnrClaimsLiabilityNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Undiscounted amount, after reinsurance, of incurred claims and allocated claim adjustment expense used in claims development for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsIncurredClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671315-158438

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Undiscounted amount, after reinsurance, of the liability for unpaid claims and allocated claim adjustment expense for short-duration insurance contracts for accident years not separately presented in claim development information. Excludes unallocated claim adjustment expense.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4B
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671311-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndAllocatedClaimAdjustmentExpenseNetNotSeparatelyPresented
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Amount of liability for unallocated claim adjustment expense for short-duration insurance contracts.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 40
-Section 50
-Paragraph 4C
-URI http://asc.fasb.org/extlink&oid=116884468&loc=SL65671315-158438

+ Details

Name:	us-gaap_ShortdurationInsuranceContractsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseAccumulatedUnallocatedClaimAdjustmentExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rnr_PropertySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=rnr_CasualtyandSpecialtySegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2012Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2013Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2014Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2015Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortdurationInsuranceContractsAccidentYear2016Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortDurationInsuranceContractsAccidentYear2017Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortDurationInsuranceContractsAccidentYear2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortDurationInsuranceContractAccidentYear2019Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortDurationInsuranceContractAccidentYear2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_ShortdurationInsuranceContractsAccidentYearAxis=us-gaap_ShortDurationInsuranceContractAccidentYear2021Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: