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Investments - Schedule of Mortgage Loan Principal Repayments (Details) - Commercial Real Estate $ in Millions | Dec. 31, 2019 USD ($)
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Debt Securities, Available-for-sale [Line Items] |
2020 | $ 122
2021 | 235
2022 | 200
2023 | 81
2024 | 193
Thereafter | 382
Total | $ 1,213

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- Definition Mortgage Loans On Real Estate Collections Of Principal After Year Five + References No definition available. + Details
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Balance Type: | debit
Period Type: | instant

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- Definition Mortgage Loans On Real Estate Collections Of Principal In Next Twelve Months + References No definition available. + Details
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Namespace Prefix: | cvs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Mortgage Loans On Real Estate Collections Of Principal In Year Five + References No definition available. + Details
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Namespace Prefix: | cvs_
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Balance Type: | debit
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- Definition Mortgage Loans On Real Estate Collections Of Principal In Year Four + References No definition available. + Details
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Namespace Prefix: | cvs_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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- Definition Mortgage Loans On Real Estate Collections Of Principal In Year Three + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
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- Definition Mortgage Loans On Real Estate Collections Of Principal In Year Two + References No definition available. + Details
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Namespace Prefix: | cvs_
Data Type: | xbrli:monetaryItemType
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- Definition The balance represents the amount of loans that are secured by real estate mortgages, offset by the reserve to cover probable credit losses on the loan portfolio. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.1(c)) -URI http://asc.fasb.org/extlink&oid=119400593&loc=d3e572229-122910 + Details
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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 No definition available. + Details
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Balance Type: | na
Period Type: | duration

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- Details
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