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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 |  | 9 Months Ended
--- | --- | ---
Mar. 18, 2024 | Sep. 30, 2024
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 |
Intangible assets | 100 |
Deferred income tax asset | 542 |
Deferred income tax liability | (25) |
Other liabilities | (180) |
Total identifiable assets acquired, net | 1,671 |
IPRD |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Intangible assets | 12,122 |
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 |
Unvested Equity Awards | Research and development |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions |  | $ 159
Unvested Equity Awards | Marketing, selling and administrative |  |
Asset Acquisition, Contingent Consideration [Line Items] |  |
Payments for asset acquisitions |  | $ 130

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