Schedule II Schedule II (STATEMENTS OF OPERATIONS - Parent Company Only) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Financial Statements, Captions [Line Items]
Equity in net income of subsidiaries and affiliates	[1]	$ 16	$ 2,433	$ 1,019
Total revenues		43,166	40,963	35,994
Administrative and other (income) expense		3,395	3,136	2,979
Business Combination, Integration Related Costs		48	0	0
Income tax expense		1,255	1,277	629
Total expenses		36,598	31,147	31,832
Net income		5,313	8,539	3,533
Chubb limited (Parent Guarantor)
Condensed Financial Statements, Captions [Line Items]
Investment income, including intercompany interest income	[2]	83	96	155
Equity in net income of subsidiaries and affiliates		5,323	8,514	3,457
Total revenues		5,406	8,610	3,612
Administrative and other (income) expense		65	56	55
Business Combination, Integration Related Costs		10	0	0
Income tax expense		18	15	24
Total expenses		93	71	79
Net income		5,313	8,539	3,533
Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest		$ (5,230)	$ 6,020	$ 5,783

[1] Equity in net income (loss) of partially-owned entities includes mark-to-market gain (loss) on private equities where we own more than three percent, totaling $(219) million, $2,004 million, and $747 million for the years ended December 31, 2022, 2021, and 2020, respectively. This line item also includes net income of $5 million, $233 million, and $167 million attributable to our investments in Huatai for the years ended December 31, 2022, 2021, and 2020, respectively.

[2] (1) Includes net investment income, interest income, and net realized gains (losses).