Consolidated Statements Of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Revenues
Net premiums written	$ 12,646	$ 12,221
Increase in unearned premiums	(646)	(638)
Net premiums earned	12,000	11,583
Net investment income	1,561	1,391
Net realized gains (losses)	(116)	(101)
Market risk benefits gains (losses)	(92)	21
Total revenues	13,353	12,894
Expenses
Losses and loss expenses	6,896	5,727
Policy benefits (includes remeasurement losses of $3 and $19)	1,227	1,180
Policy acquisition costs	2,313	2,207
Administrative expenses	1,080	1,070
Interest expense	181	178
Other (income) expense	(83)	(191)
Amortization of purchased intangibles	75	80
Integration expenses	0	7
Total expenses	11,689	10,258
Income before income tax	1,664	2,636
Income tax expense	321	342
Net income	1,343	2,294
Net income attributable to noncontrolling interests	12	151
Net income attributable to Chubb	1,331	2,143
Other comprehensive income (loss):
Unrealized appreciation (depreciation)	901	(677)
Current discount rate on future policy benefits	(122)	(53)
Instrument-specific credit risk on market risk benefits	4	5
Cumulative foreign currency translation adjustment	359	80
Other, including postretirement benefit liability adjustment	(95)	31
Other comprehensive income (loss), before income tax	1,047	(614)
Income tax (expense) benefit related to OCI items	(43)	9
Other comprehensive income (loss)	1,004	(605)
Comprehensive income	2,347	1,689
Comprehensive income attributable to noncontrolling interests	7	123
Comprehensive income attributable to Chubb	$ 2,340	$ 1,566
Earnings per share
Basic earnings per share attributable to Chubb	$ 3.32	$ 5.28
Diluted earnings per share attributable to Chubb	$ 3.29	$ 5.23