Accounts Receivable, Net - Amounts Included in Accounts Receivable, Net (Details) - USD ($) $ in Millions	Sep. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pharmaceutical manufacturers receivable, including held for sale assets	$ 13,708	$ 8,169
Noninsurance customer receivables, including held for sale assets	12,615	8,044
Insurance customer receivables, including held for sale assets	2,732	2,359
Other receivables, including held for sale assets	323	272
Total	29,378	18,844
Accounts receivable, net	27,846	17,722
Held-for-Sale \| Medicare Advantage and related Cigna Healthcare businesses
Accounts, Notes, Loans and Financing Receivable [Line Items]
Accounts receivable, net classified as assets of businesses held for sale	$ (1,532)	$ (1,122)

Accounts and Other Receivables, Net, Current, Before Reclassification To Disposal Group Assets Held For Sale

No definition available.

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- Definition

Insurance Customer Receivables, Before Reclassification To Disposal Group Assets Held For Sale

+ References

No definition available.

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- Definition

Noninsurance Customer Receivables Excluding Pharmaceutical Manufacturers Receivable Before Reclassification To Disposal Group Assets Held For Sale

+ References

No definition available.

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- Definition

Pharmaceutical Manufacturers Receivable Before Reclassification To Disposal Group Assets Held For Sale

+ References

No definition available.

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- Definition

Receivables, Net, Current Before Reclassification To Disposal Group Assets Held For Sale

+ References

No definition available.

+ 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

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 310
-SubTopic 20
-Name Accounting Standards Codification
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- Definition

Amount classified as accounts, notes and loans receivable attributable to disposal group held for sale or disposed of.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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- Definition

The total amount due to the entity within one year of the balance sheet date (or one operating cycle, if longer) from outside sources, including trade accounts receivable, notes and loans receivable, as well as any other types of receivables, net of allowances established for the purpose of reducing such receivables to an amount that approximates their net realizable value.

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 852
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