XML 39 R22.htm IDEA: XBRL DOCUMENT
v3.25.2

Legal Proceedings | 6 Months Ended
--- | ---
Jun. 30, 2025
Disclosure Legal Proceedings [Abstract] |
Legal Proceedings | The Company, in common with the insurance industry in general, is subject to litigation and arbitration in the normal course of its business. As of June 30, 2025, the Company was not a party to any litigation or arbitration which is expected by management to have a material adverse effect on the Company’s results of operations and financial condition and liquidity.

X
- Definition Disclosure Legal Proceedings [Abstract] + References No definition available. + Details
Name: | acgl_DisclosureLegalProceedingsAbstract
Namespace Prefix: | acgl_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosure for legal proceedings, legal contingencies, litigation, regulatory and environmental matters and other contingencies. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 450 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org/450/tableOfContent + Details
Name: | us-gaap_LegalMattersAndContingenciesTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration