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Investments - Mortgage Loans (Details) - Commercial Real Estate - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Mortgage Loans on Real Estate [Line Items]
New mortgage loans	$ 356	$ 262
Mortgage loans fully repaid	178	373
Mortgage loans foreclosed	$ 0	$ 0

X

- Definition

Pertains to amount of mortgage loans fully repaid.

+ References

No definition available.

+ Details

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Namespace Prefix:	cvs_
Data Type:	xbrli:monetaryItemType
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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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Namespace Prefix:	srt_
Data Type:	xbrli:stringItemType
Balance Type:	na
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X

- Definition

Amount of decrease in investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from foreclosure.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 6))
-URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

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- Definition

Amount of increase in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate, from new investment.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 948
-SubTopic 310
-Section S99
-Paragraph 1
-Subparagraph (SX 210.12-29(Footnote 6))
-URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014

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