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ACQUISITIONS AND OTHER ARRANGEMENTS - Other Business Development Activities (Details) - USD ($) $ in Millions | 1 Months Ended | 6 Months Ended
--- | --- | ---
Jan. 31, 2020 | Jun. 30, 2020
Licensing Agreements |  |
Business Acquisition [Line Items] |  |
Payments to acquire intangible assets |  | $ 22
Payments for Development Regulatory and Commercial Milestones |  | $ 44
Developed Technology Rights Acquisition | Developed Technology Intangible Asset |  |
Business Acquisition [Line Items] |  |
Asset acquisition, consideration transferred | $ 60 |
Finite-lived intangible asset, useful life | 11 years |

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