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ACQUISITIONS, DIVESTITURES, LICENSING AND OTHER ARRANGEMENTS - Schedule of Assets Acquired and Liabilities Assumed in Karuna Acquisition (Details) - Karuna - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 18, 2024 | Mar. 31, 2024
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | $ 14,027 |
Transaction costs | 55 |
Total consideration allocated | 13,793 |
Common Stock |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | 12,606 |
Equity |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | 1,421 |
Unvested Equity Awards |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | 289 |
Less: Charge for unvested stock awards | $ (289) |
Unvested Equity Awards | Selling, general and administrative |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions |  | $ 130
Unvested Equity Awards | Research and development |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions |  | $ 159

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