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FAIR VALUE MEASUREMENTS - Equity Investment In Galapagos (Details) - Galapagos NV - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Equity investment	$ 1,302	$ 1,648
Prepaid and other current assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Equity investment	276	351
Other long-term assets
Fair Value, Assets and Liabilities Measured on Recurring Basis [Line Items]
Equity investment	$ 1,026	$ 1,297

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- Definition

Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 45
-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=99377092&loc=SL75136599-209740

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- Definition

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+ References

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