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Reinsurance - Narrative (Details) - Subsequent Event | 1 Months Ended
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Jan. 31, 2024 reinsurance_agreement
Ceded Credit Risk [Line Items] |
Number of reinsurance contracts entered into | 2
Term of reinsurance agreements with unrelated issuer | 4 years

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- Definition This line item represents the four years of a reinsurance agreement with an unrelated insurer. + References No definition available. + Details
Name: | cvs_FourYearsReinsuranceAgreementWithUnrelatedInsurer
Namespace Prefix: | cvs_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Number of reinsurance contracts entered into with an unrelated insurer. + References No definition available. + Details
Name: | cvs_NumberofReinsuranceContractsEnteredInto
Namespace Prefix: | cvs_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 825 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Publisher FASB -URI https://asc.fasb.org//1943274/2147479383/944-825-50-1B + Details
Name: | us-gaap_CededCreditRiskLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |