Summary of Significant Accounting Policies - Basis of Presentation (Details)	Dec. 31, 2024
CNA
Basis of Presentation [Abstract]
Subsidiary ownership percentage	92.00%

The parent entity's interest in net assets of the subsidiary, expressed as a percentage.

No definition available.

Name:	us-gaap_MinorityInterestOwnershipPercentageByParent
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant