Consolidated Statements Of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Revenues
Net premiums written	$ 13,829	$ 13,104	$ 39,410	$ 35,765
Increase in unearned premiums	(456)	(430)	(2,162)	(1,950)
Net premiums earned	13,373	12,674	37,248	33,815
Net investment income	1,508	1,314	4,367	3,566
Net realized gains (losses)	198	(103)	201	(484)
Market risk benefits gains (losses)	(230)	(32)	(238)	(154)
Total revenues	14,849	13,853	41,578	36,743
Expenses
Losses and loss expenses	7,383	7,106	19,541	17,937
Policy benefits (includes remeasurement gains of $26, $25, $4 and $21)	1,099	938	3,498	2,565
Policy acquisition costs	2,324	2,178	6,757	6,142
Administrative expenses	1,094	1,060	3,258	2,959
Interest expense	192	174	552	499
Other (income) expense	(325)	(154)	(626)	(550)
Amortization of purchased intangibles	81	84	241	226
Integration expenses	7	14	21	51
Total expenses	11,855	11,400	33,242	29,829
Income before income tax	2,994	2,453	8,336	6,914
Income tax expense	504	413	1,336	1,189
Net income	2,490	2,040	7,000	5,725
Net income (loss) attributable to noncontrolling interests	166	(3)	303	(3)
Net income attributable to Chubb	2,324	2,043	6,697	5,728
Other comprehensive income (loss):
Unrealized appreciation (depreciation)	3,459	(2,170)	2,293	(1,578)
Current discount rate on future policy benefits	(672)	683	(672)	497
Instrument-specific credit risk on market risk benefits	(8)	(5)	2	3
Cumulative foreign currency translation adjustment	445	(317)	(5)	(279)
Other, including postretirement benefit liability adjustment	(19)	37	(17)	52
Other comprehensive income (loss), before income tax	3,205	(1,772)	1,601	(1,305)
Income tax expense related to OCI items	150	0	112	104
Other comprehensive income (loss)	3,055	(1,772)	1,489	(1,409)
Comprehensive income	5,545	268	8,489	4,316
Comprehensive income (loss) attributable to noncontrolling interests	187	(79)	253	(79)
Comprehensive income attributable to Chubb	$ 5,358	$ 347	$ 8,236	$ 4,395
Earnings per share
Basic earnings per share attributable to Chubb	$ 5.75	$ 4.99	$ 16.55	$ 13.90
Diluted earnings per share attributable to Chubb	$ 5.70	$ 4.95	$ 16.38	$ 13.79