Accounts Receivable, Net - Amounts Included in Accounts Receivable, Net (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pharmaceutical manufacturer receivables		$ 7,108
Noninsurance customer receivables		6,899
Insurance customer receivables		2,963
Other receivables		248
Pharmaceutical manufacturers receivable, including held for sale assets	$ 8,169
Noninsurance customer receivables, including held for sale assets	8,044
Insurance customer receivables, including held for sale assets	2,359
Other receivables, including held for sale assets	272
Total	18,844
Accounts receivable, net	17,722	$ 17,218	[1]
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	$ (1,122)

[1] Amounts have been restated to reflect the adoption of Targeted Improvements to the Accounting for Long-Duration Contracts in 2023. See Note 2 to the Consolidated Financial Statements for further information.