Accounts Receivable, Net - Amounts Included in Accounts Receivable, Net (Details) - USD ($) $ in Millions |
Mar. 31, 2024 |
Dec. 31, 2023 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Noninsurance customer receivables, including held for sale assets | $ 9,735 | $ 8,044 |
| Pharmaceutical manufacturers receivable, including held for sale assets | 9,512 | 8,169 |
| Insurance customer receivables, including held for sale assets | 2,045 | 2,359 |
| Other receivables, including held for sale assets | 230 | 272 |
| Total | 21,522 | 18,844 |
| Accounts receivable, net | 20,563 | 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 | $ (959) | $ (1,122) |