Insurance - Short-duration insurance contracts, claims development (Details) - Property and casualty insurance $ in Millions	Dec. 31, 2023 USD ($) claim	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 25,304
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	18,181
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)	405
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	7,528
Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	1,957	$ 1,958	$ 1,954	$ 1,957	$ 1,978	$ 2,004	$ 2,038	$ 2,040	$ 2,050	$ 2,083
Total IBNR Plus Expected Development on Reported Claims	$ 36
Cumulative Number of Reported Claims | claim	220,128
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,893	1,870	1,847	1,812	1,773	1,705	1,588	1,422	1,174	594
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	96.70%
Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,991	1,998	2,003	2,013	2,022	2,038	2,041	2,047	2,114
Total IBNR Plus Expected Development on Reported Claims	$ 45
Cumulative Number of Reported Claims | claim	231,168
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,909	1,878	1,847	1,791	1,722	1,592	1,404	1,129	619
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	95.90%
Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,974	1,986	2,004	2,034	2,060	2,082	2,083	2,117
Total IBNR Plus Expected Development on Reported Claims	$ 80
Cumulative Number of Reported Claims | claim	223,280
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,848	1,806	1,750	1,662	1,539	1,350	1,099	577
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	93.60%
Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 2,266	2,256	2,269	2,301	2,329	2,348	2,375
Total IBNR Plus Expected Development on Reported Claims	$ 134
Cumulative Number of Reported Claims | claim	247,224
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 2,030	1,953	1,844	1,736	1,524	1,250	709
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	89.60%
Accident Year 2018
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 2,449	2,452	2,439	2,499	2,516	2,507
Total IBNR Plus Expected Development on Reported Claims	$ 211
Cumulative Number of Reported Claims | claim	236,982
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 2,099	1,977	1,807	1,606	1,337	730
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	85.70%
Accident Year 2019
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 2,642	2,632	2,672	2,674	2,721
Total IBNR Plus Expected Development on Reported Claims	$ 286
Cumulative Number of Reported Claims | claim	255,871
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 2,160	1,983	1,768	1,448	847
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	81.80%
Accident year 2020
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 2,500	2,546	2,635	2,748
Total IBNR Plus Expected Development on Reported Claims	$ 406
Cumulative Number of Reported Claims | claim	205,973
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,842	1,620	1,337	758
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	73.70%
Accident Year 2021
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 2,689	2,754	2,861
Total IBNR Plus Expected Development on Reported Claims	$ 660
Cumulative Number of Reported Claims | claim	206,733
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,687	1,368	746
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	62.70%
Accident Year 2022
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 3,205	3,270
Total IBNR Plus Expected Development on Reported Claims	$ 1,000
Cumulative Number of Reported Claims | claim	216,920
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,724	904
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	53.80%
Accident Year 2023
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 3,631
Total IBNR Plus Expected Development on Reported Claims	$ 1,731
Cumulative Number of Reported Claims | claim	201,558
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 989
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	27.20%
Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	$ 7,123
Property and transportation
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	9,770
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	8,160
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)	26
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	1,636
Property and transportation | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	800	800	802	804	808	815	820	817	828	844
Total IBNR Plus Expected Development on Reported Claims	$ 5
Cumulative Number of Reported Claims | claim	133,284
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 793	792	791	789	783	770	744	693	632	329
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	99.10%
Property and transportation | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 769	769	768	772	777	777	779	784	818
Total IBNR Plus Expected Development on Reported Claims	$ 4
Cumulative Number of Reported Claims | claim	135,083
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 761	755	750	744	736	707	667	582	359
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	99.00%
Property and transportation | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 689	689	688	694	706	714	716	746
Total IBNR Plus Expected Development on Reported Claims	$ 8
Cumulative Number of Reported Claims | claim	121,400
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 672	665	656	640	618	577	521	294
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	97.50%
Property and transportation | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 820	820	816	823	843	847	889
Total IBNR Plus Expected Development on Reported Claims	$ 11
Cumulative Number of Reported Claims | claim	140,998
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 794	783	755	735	696	640	379
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	96.80%
Property and transportation | Accident Year 2018
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 876	882	876	886	902	932
Total IBNR Plus Expected Development on Reported Claims	$ 15
Cumulative Number of Reported Claims | claim	130,721
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 838	824	781	738	676	396
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	95.70%
Property and transportation | Accident Year 2019
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,057	1,055	1,051	1,058	1,111
Total IBNR Plus Expected Development on Reported Claims	$ 26
Cumulative Number of Reported Claims | claim	154,248
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 998	959	904	823	527
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	94.40%
Property and transportation | Accident year 2020
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 949	957	974	1,043
Total IBNR Plus Expected Development on Reported Claims	$ 39
Cumulative Number of Reported Claims | claim	122,112
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 857	804	726	461
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	90.30%
Property and transportation | Accident Year 2021
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,022	1,023	1,119
Total IBNR Plus Expected Development on Reported Claims	$ 69
Cumulative Number of Reported Claims | claim	123,416
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 867	767	449
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	84.80%
Property and transportation | Accident Year 2022
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,316	1,393
Total IBNR Plus Expected Development on Reported Claims	$ 157
Cumulative Number of Reported Claims | claim	136,540
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 1,018	587
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	77.40%
Property and transportation | Accident Year 2023
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,472
Total IBNR Plus Expected Development on Reported Claims	$ 432
Cumulative Number of Reported Claims | claim	127,664
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 562
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	38.20%
Property and transportation | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	$ 1,610
Specialty casualty
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	12,401
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	7,771
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)	354
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	4,984
Specialty casualty | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	951	955	950	952	967	982	1,006	1,008	1,008	1,035
Total IBNR Plus Expected Development on Reported Claims	$ 28
Cumulative Number of Reported Claims | claim	57,373
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 899	881	862	829	801	755	680	574	412	190
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	94.50%
Specialty casualty | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,002	1,007	1,015	1,021	1,024	1,042	1,041	1,043	1,081
Total IBNR Plus Expected Development on Reported Claims	$ 36
Cumulative Number of Reported Claims | claim	58,456
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 934	913	888	844	792	702	577	411	178
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	93.20%
Specialty casualty | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,036	1,046	1,069	1,090	1,101	1,116	1,122	1,131
Total IBNR Plus Expected Development on Reported Claims	$ 63
Cumulative Number of Reported Claims | claim	56,695
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 938	906	870	806	713	584	418	186
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	90.50%
Specialty casualty | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,139	1,139	1,162	1,189	1,204	1,221	1,211
Total IBNR Plus Expected Development on Reported Claims	$ 110
Cumulative Number of Reported Claims | claim	57,386
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 959	902	833	755	612	422	200
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	84.20%
Specialty casualty | Accident Year 2018
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,264	1,269	1,262	1,302	1,307	1,277
Total IBNR Plus Expected Development on Reported Claims	$ 169
Cumulative Number of Reported Claims | claim	59,456
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 991	901	794	649	475	210
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	78.40%
Specialty casualty | Accident Year 2019
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,284	1,280	1,322	1,311	1,308
Total IBNR Plus Expected Development on Reported Claims	$ 230
Cumulative Number of Reported Claims | claim	59,684
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 913	795	651	455	212
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	71.10%
Specialty casualty | Accident year 2020
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,232	1,258	1,329	1,352
Total IBNR Plus Expected Development on Reported Claims	$ 313
Cumulative Number of Reported Claims | claim	54,129
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 757	613	446	188
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	61.40%
Specialty casualty | Accident Year 2021
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,342	1,389	1,384
Total IBNR Plus Expected Development on Reported Claims	$ 497
Cumulative Number of Reported Claims | claim	55,962
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 625	438	191
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	46.60%
Specialty casualty | Accident Year 2022
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,503	1,475
Total IBNR Plus Expected Development on Reported Claims	$ 697
Cumulative Number of Reported Claims | claim	56,742
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 507	198
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	33.70%
Specialty casualty | Accident Year 2023
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 1,648
Total IBNR Plus Expected Development on Reported Claims	$ 1,035
Cumulative Number of Reported Claims | claim	53,352
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 248
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	15.00%
Specialty casualty | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	$ 4,630
Specialty financial
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	1,953
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	1,625
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)	0
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	328
Specialty financial | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	134	135	136	137	142	147	153	156	157	146
Total IBNR Plus Expected Development on Reported Claims	$ 0
Cumulative Number of Reported Claims | claim	29,471
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 141	141	140	141	139	137	128	125	109	62
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	105.20%
Specialty financial | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 133	135	136	138	145	153	158	160	156
Total IBNR Plus Expected Development on Reported Claims	$ 0
Cumulative Number of Reported Claims | claim	37,629
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 133	134	134	134	132	133	129	110	72
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	100.00%
Specialty financial | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 172	173	170	174	182	187	184	179
Total IBNR Plus Expected Development on Reported Claims	$ 1
Cumulative Number of Reported Claims | claim	45,185
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 172	171	164	163	161	158	141	88
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	100.00%
Specialty financial | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 210	202	203	208	212	215	212
Total IBNR Plus Expected Development on Reported Claims	$ 5
Cumulative Number of Reported Claims | claim	48,840
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 194	192	193	194	186	169	120
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	92.40%
Specialty financial | Accident Year 2018
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 198	201	207	219	217	212
Total IBNR Plus Expected Development on Reported Claims	$ 6
Cumulative Number of Reported Claims | claim	46,805
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 193	192	188	187	163	112
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	97.50%
Specialty financial | Accident Year 2019
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 182	186	191	198	194
Total IBNR Plus Expected Development on Reported Claims	$ 9
Cumulative Number of Reported Claims | claim	41,939
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 170	168	164	146	99
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	93.40%
Specialty financial | Accident year 2020
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 193	202	215	231
Total IBNR Plus Expected Development on Reported Claims	$ 15
Cumulative Number of Reported Claims | claim	29,732
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 162	159	144	100
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	83.90%
Specialty financial | Accident Year 2021
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 187	201	223
Total IBNR Plus Expected Development on Reported Claims	$ 25
Cumulative Number of Reported Claims | claim	27,355
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 146	136	98
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	78.10%
Specialty financial | Accident Year 2022
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 234	243
Total IBNR Plus Expected Development on Reported Claims	$ 54
Cumulative Number of Reported Claims | claim	23,638
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 164	108
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	70.10%
Specialty financial | Accident Year 2023
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 310
Total IBNR Plus Expected Development on Reported Claims	$ 127
Cumulative Number of Reported Claims | claim	20,542
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 150
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	48.40%
Specialty financial | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	$ 328
Other specialty
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	1,180
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	625
Unpaid losses and LAE — 11th year and prior (excluding unallocated LAE)	25
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	580
Other specialty | Accident Year 2014
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	72	68	66	64	61	60	59	59	57	58
Total IBNR Plus Expected Development on Reported Claims	$ 3
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 60	56	54	53	50	43	36	30	21	$ 13
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	83.30%
Other specialty | Accident Year 2015
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 87	87	84	82	76	66	63	60	59
Total IBNR Plus Expected Development on Reported Claims	$ 5
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 81	76	75	69	62	50	31	26	$ 10
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	93.10%
Other specialty | Accident Year 2016
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 77	78	77	76	71	65	61	61
Total IBNR Plus Expected Development on Reported Claims	$ 8
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 66	64	60	53	47	31	19	$ 9
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	85.70%
Other specialty | Accident Year 2017
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 97	95	88	81	70	65	63
Total IBNR Plus Expected Development on Reported Claims	$ 8
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 83	76	63	52	30	19	$ 10
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	85.60%
Other specialty | Accident Year 2018
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 111	100	94	92	90	86
Total IBNR Plus Expected Development on Reported Claims	$ 21
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 77	60	44	32	23	$ 12
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	69.40%
Other specialty | Accident Year 2019
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 119	111	108	107	108
Total IBNR Plus Expected Development on Reported Claims	$ 21
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 79	61	49	24	$ 9
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	66.40%
Other specialty | Accident year 2020
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 126	129	117	122
Total IBNR Plus Expected Development on Reported Claims	$ 39
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 66	44	21	$ 9
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	52.40%
Other specialty | Accident Year 2021
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 138	141	135
Total IBNR Plus Expected Development on Reported Claims	$ 69
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 49	27	$ 8
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	35.50%
Other specialty | Accident Year 2022
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 152	159
Total IBNR Plus Expected Development on Reported Claims	$ 92
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 35	$ 11
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	23.00%
Other specialty | Accident Year 2023
Claims Development [Line Items]
Incurred Claims and Allocated LAE, Net of Reinsurance	$ 201
Total IBNR Plus Expected Development on Reported Claims	$ 137
Cumulative Number of Reported Claims | claim	0
Cumulative Paid Claims and Allocated LAE, Net of Reinsurance	$ 29
Cumulative Percentage Paid of Incurred Claims and Allocated LAE, Net of Reinsurance	14.40%
Other specialty | Excludes short-duration insurance contracts detail for accident years not separately presented
Claims Development [Line Items]
Unpaid losses and LAE, net of reinsurance (excluding unallocated LAE)	$ 555