XML 24 R14.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Legal Proceedings, Contingencies and Guarantees | 9 Months Ended
--- | ---
Sep. 30, 2022
Legal Proceedings, Commitments and Contingencies, and Guarantees [Abstract] |
Legal Proceedings, Contingencies and Guarantees | Legal Proceedings, Contingencies and Guarantees The Company is a party to various claims and litigation incidental to its business, which, based on the facts and circumstances currently known, are not material to the Company's results of operations or financial position. Guarantees The Company has provided guarantees, if the primary obligor fails to perform, to holders of structured settlement annuities issued by a previously owned subsidiary. As of September 30, 2022, the potential amount of future payments the Company could be required to pay under these guarantees was approximately $1.6 billion, which will be paid over the lifetime of the annuitants. The Company does not believe any payment is likely under these guarantees, as the Company is the beneficiary of a trust that must be maintained at a level that approximates the discounted reserves for these annuities.

X
- Definition Legal Proceedings, Commitments and Contingencies, and Guarantees [Text Block] + References No definition available. + Details
Name: | cna_LegalProceedingsCommitmentsAndContingenciesAndGuaranteesTextBlock
Namespace Prefix: | cna_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Legal Proceedings, Commitments and Contingencies, and Guarantees [Abstract] + References No definition available. + Details
Name: | cna_LegalProceedingsCommitmentsandContingenciesandGuaranteesAbstract
Namespace Prefix: | cna_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration