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v3.23.1

Acquisitions, Divestitures and Asset Sales - Narrative (Details) $ / shares in Units, member in Thousands, $ in Millions |  |  |  | 1 Months Ended | 3 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | --- | ---
Feb. 07, 2023 USD ($) $ / shares | Sep. 02, 2022 USD ($) $ / shares | Jul. 31, 2020 USD ($) | Nov. 30, 2022 USD ($) | Jun. 30, 2022 USD ($) | Dec. 31, 2022 USD ($) | Sep. 30, 2022 USD ($) | Mar. 31, 2022 USD ($) member | Dec. 31, 2022 USD ($) | Dec. 31, 2021 USD ($) | Dec. 31, 2020 USD ($) | May 31, 2022 member
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on assets held for sale |  |  |  |  |  |  |  |  | $ 2,533 | $ 0 | $ 0 |
Gain (loss) on sale of subsidiaries |  |  |  |  |  |  |  |  | 475 | $ 0 | 269 |
Oak Street Health Inc. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash to be received by shareholders in proposed/pending acquisition (in dollars per share) | $ / shares | $ 39.00 |  |  |  |  |  |  |  |  |  |  |
Total value of proposed/pending acquisition | $ 10,600 |  |  |  |  |  |  |  |  |  |  |
Termination fee | 500 |  |  |  |  |  |  |  |  |  |  |
Oak Street Health Inc. | Oak Street Health Inc. | Subsequent Event |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Termination fee | $ 300 |  |  |  |  |  |  |  |  |  |  |
Signify Health, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Cash to be received by shareholders in proposed/pending acquisition (in dollars per share) | $ / shares |  | $ 30.50 |  |  |  |  |  |  |  |  |  |
Total value of proposed/pending acquisition |  | $ 8,000 |  |  |  |  |  |  |  |  |  |
Termination fee |  | 380 |  |  |  |  |  |  |  |  |  |
Signify Health, Inc. | Signify Health, Inc. |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Termination fee |  | $ 228 |  |  |  |  |  |  |  |  |  |
Disposal Group, Held-for-sale, Not Discontinued Operations | Omnicare Long-Term Care Business | Pharmacy & Consumer Wellness |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on assets held for sale |  |  |  |  |  | $ 12 | $ 2,500 |  | 2,500 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | bswift LLC | Health Care Benefits |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of subsidiary |  |  |  | $ 735 |  |  |  |  |  |  |  |
Gain (loss) on sale of subsidiaries |  |  |  |  |  |  |  |  | 250 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Payflex | Health Care Benefits |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of subsidiary |  |  |  |  | $ 775 |  |  |  |  |  |  |
Gain (loss) on sale of subsidiaries |  |  |  |  |  |  |  |  | 225 |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | Thailand Business | Health Care Benefits |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Loss on assets held for sale |  |  |  |  |  |  |  | $ 41 | $ 41 |  |  |
Number of medical members | member |  |  |  |  |  |  |  | 266 |  |  |  |
Disposal Group, Disposed of by Sale, Not Discontinued Operations | International Health Care Renewal Rights |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Number of international health care members, renewal rights sold | member |  |  |  |  |  |  |  |  |  |  |  | 200
Discontinued Operations, Disposed of by Sale | Coventry Health Care Workers Compensation Business | Health Care Benefits |  |  |  |  |  |  |  |  |  |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from divestiture of subsidiary |  |  | $ 850 |  |  |  |  |  |  |  |  |
Gain (loss) on sale of subsidiaries |  |  |  |  |  |  |  |  |  |  | $ 269 |

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