Consolidated Statements Of Operations and Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues
Net premiums written	$ 12,221	$ 10,710
Increase in unearned premiums	(638)	(568)
Net premiums earned	11,583	10,142
Net investment income	1,391	1,107
Net realized gains (losses)	(101)	(77)
Market risk benefits gains (losses)	21	(115)
Total revenues	12,894	11,057
Expenses
Losses and loss expenses	5,727	5,148
Policy benefits (includes remeasurement gains (losses) of $(19) and $1)	1,180	797
Policy acquisition costs	2,207	1,948
Administrative expenses	1,070	930
Interest expense	178	160
Other (income) expense	(191)	(296)
Amortization of purchased intangibles	80	72
Cigna integration expenses	7	22
Total expenses	10,258	8,781
Income before income tax	2,636	2,276
Income tax expense	342	384
Net Income	2,294	1,892
Net income attributable to noncontrolling interests	151	0
Net income attributable to Chubb	2,143	1,892
Other comprehensive income (loss):
Change in unrealized appreciation (depreciation)	(677)	1,786
Current discount rate on future policy benefits	(53)	(151)
Instrument-specific credit risk on market risk benefits	5	(3)
Cumulative foreign currency translation adjustment	80	(177)
Other, including postretirement benefit liability adjustment	31	(33)
Other comprehensive income (loss), before income tax	(614)	1,422
Income tax (expense) benefit related to OCI items	9	(132)
Other comprehensive income (loss)	(605)	1,290
Comprehensive income	1,689	3,182
Comprehensive income attributable to noncontrolling interests	123	0
Comprehensive income attributable to Chubb	$ 1,566	$ 3,182
Earnings per share
Basic earnings per share attributable to Chubb	$ 5.28	$ 4.57
Diluted earnings per share attributable to Chubb	$ 5.23	$ 4.53