Accounts Receivable, Net - Amounts Included in Accounts Receivable, Net (Details) - USD ($) $ in Millions	Jun. 30, 2024	Dec. 31, 2023
Accounts, Notes, Loans and Financing Receivable [Line Items]
Pharmaceutical manufacturers receivable, including held for sale assets	$ 12,555	$ 8,169
Noninsurance customer receivables, including held for sale assets	10,946	8,044
Insurance customer receivables, including held for sale assets	2,325	2,359
Other receivables, including held for sale assets	289	272
Total	26,115	18,844
Accounts receivable, net	25,111	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	$ (1,004)	$ (1,122)