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Acquisitions and Assets Held for Sale - Schedule of Fair Value of Consideration Transferred (Details) - USD ($) shares in Millions, $ in Millions | May 02, 2023 | Mar. 29, 2023
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Oak Street Health Inc. |  |
Business Acquisition [Line Items] |  |
Cash | $ 9,579 |
Effective settlement of pre-existing relationship | (29) |
Total consideration transferred | 9,668 |
Oak Street Health Inc. | Pre-combination services |  |
Business Acquisition [Line Items] |  |
Fair value of replacement equity awards for pre-combination services | $ 118 |
Replacement equity awards for pre-combination services (in shares) | 3.9 |
Oak Street Health Inc. | Post-combination services |  |
Business Acquisition [Line Items] |  |
Fair value of replacement equity awards for pre-combination services | $ 165 |
Signify Health, Inc. |  |
Business Acquisition [Line Items] |  |
Cash |  | $ 7,450
Effective settlement of pre-existing relationship |  | (111)
Total consideration transferred |  | 7,353
Signify Health, Inc. | Pre-combination services |  |
Business Acquisition [Line Items] |  |
Fair value of replacement equity awards for pre-combination services |  | $ 14
Replacement equity awards for pre-combination services (in shares) |  | 3.2
Signify Health, Inc. | Post-combination services |  |
Business Acquisition [Line Items] |  |
Fair value of replacement equity awards for pre-combination services |  | $ 167

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