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ACQUISITIONS, DIVESTITURES, LICENSING AND OTHER ARRANGEMENTS - Schedule of Assets Acquired and Liabilities Assumed in Karuna Acquisition (Details) - USD ($) $ in Millions |  | 3 Months Ended
--- | --- | ---
Mar. 18, 2024 | Mar. 31, 2024
Asset Acquisition, Contingent Consideration [Line Items] |  |
Deferred income tax asset | $ 542 |
IPRD |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Other intangible assets | 12,122 |
Karuna |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | (14,027) |
Transaction costs | 55 |
Total consideration allocated | 13,793 |
Cash and cash equivalents | 1,167 |
Other assets | 67 |
Other intangible assets | 100 |
Deferred income tax liability | (25) |
Other liabilities | (180) |
Total identifiable assets acquired, net | 1,671 |
Common Stock | Karuna |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | (12,606) |
Equity | Karuna |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | (1,421) |
Unvested Equity Awards | Karuna |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions | $ (289) |
Unvested Equity Awards | Karuna | Equity Securities |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions |  | $ (130)
Unvested Equity Awards | Karuna | Research and development |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions |  | $ (159)

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