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Goodwill and Other Intangibles - Goodwill (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Goodwill [Roll Forward] |  |  |
Balance, beginning of the period | $ 79,121 | $ 79,552 |
Impairment | 0 | (431) | $ 0
Balance, end of the period | 78,150 | 79,121 | 79,552
Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Goodwill [Roll Forward] |  |  |
Divestitures | (971) |  |
Health Care Benefits |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of the period | 45,130 | 45,130 |
Impairment |  | 0 |
Balance, end of the period | 44,159 | 45,130 | 45,130
Health Care Benefits | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Goodwill [Roll Forward] |  |  |
Divestitures | (971) |  |
Pharmacy Services |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of the period | 23,615 | 23,615 |
Impairment |  | 0 |
Balance, end of the period | 23,615 | 23,615 | 23,615
Pharmacy Services | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Goodwill [Roll Forward] |  |  |
Divestitures | 0 |  |
Retail/ LTC |  |  |
Goodwill [Roll Forward] |  |  |
Balance, beginning of the period | 10,376 | 10,807 |
Impairment |  | (431) |
Balance, end of the period | 10,376 | $ 10,376 | $ 10,807
Retail/ LTC | Disposal Group, Disposed of by Sale, Not Discontinued Operations |  |  |
Goodwill [Roll Forward] |  |  |
Divestitures | $ 0 |  |

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