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v3.19.3

Reinsurance (Details) | 1 Months Ended
--- | ---
Jan. 31, 2019 agreement
Reinsurance Disclosures [Abstract] |
Number of reinsurance agreements | 2
Term of reinsurance agreement | 4 years

X
- 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

X
- 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

X
- References No definition available. + Details
Name: | us-gaap_ReinsuranceDisclosuresAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration