Debt Instrument, Redemption Price, Discount, Spread On Variable Rate

No definition available.

Name:	ci_DebtInstrumentRedemptionPriceDiscountSpreadOnVariableRate
Namespace Prefix:	ci_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

- Definition

Proceeds From Issuance Of Long-term Debt, Net Of Discounts And Underwriting Fees

+ References

No definition available.

+ Details

Name:	ci_ProceedsFromIssuanceOfLongTermDebtNetOfDiscountsAndUnderwritingFees
Namespace Prefix:	ci_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 1B
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=123466505&loc=SL123495323-112611

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=124435984&loc=d3e28551-108399

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI https://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

Reference 4: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 50
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=124429444&loc=SL124452920-239629

Reference 5: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69C
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495737-112612

Reference 6: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 55
-Paragraph 69B
-URI https://asc.fasb.org/extlink&oid=123466577&loc=SL123495735-112612

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	instant

- 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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ci_NotesDue20265685Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_UsTreasuryUstInterestRateMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ci_NotesDue20335400InterestMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Debt Issuances and Redemptions (Details) $ in Millions	Mar. 07, 2023 USD ($)	Mar. 31, 2023
Senior Notes
Debt Instrument [Line Items]
Principal	$ 1,500
$700 million, 5.685% Notes due March 2026
Debt Instrument [Line Items]
Interest rate		5.685%
$700 million, 5.685% Notes due March 2026 \| Senior Notes
Debt Instrument [Line Items]
Principal	$ 700
Interest rate	5.685%
Net proceeds	$ 698
$700 million, 5.685% Notes due March 2026 \| Senior Notes \| Treasury rate
Debt Instrument [Line Items]
Redemption price discount, spread on variable rate	0.0020
$800 million, 5.400% Notes due March 2033
Debt Instrument [Line Items]
Interest rate		5.40%
$800 million, 5.400% Notes due March 2033 \| Senior Notes
Debt Instrument [Line Items]
Principal	$ 800
Interest rate	5.40%
Net proceeds	$ 796
$800 million, 5.400% Notes due March 2033 \| Senior Notes \| Treasury rate
Debt Instrument [Line Items]
Redemption price discount, spread on variable rate	0.0025