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GOODWILL AND INTANGIBLE ASSETS - Additional Information (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2022 | Mar. 31, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021 | Dec. 31, 2020
Intangible Assets [Line Items] |  |  |  |  |  |
Aggregate amortization expense related to finite-lived intangible assets | $ 445 |  | $ 440 | $ 890 | $ 835 |
In-process research and development impairment | $ 0 |  | $ 0 | 2,700 | $ 0 |
In Process Research And Development Trodelvy For HR+/HER2- |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Indefinite-lived intangible assets, fair value |  | $ 6,100 |  |  |  |
In Process Research And Development Trodelvy For HR+/HER2- | Fair Value, Nonrecurring |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
In-process research and development impairment |  | 2,700 |  | 2,700 |  |
MYR GmbH |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Measurement period adjustments |  | $ 18 |  | $ 18 |  |
Immunomedics | In Process Research And Development Trodelvy For HR+/HER2- |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Indefinite-lived intangible assets |  |  |  |  |  | $ 8,800
Immunomedics | In Process Research And Development Trodelvy For HR+/HER2- | Discount Rate |  |  |  |  |  |
Intangible Assets [Line Items] |  |  |  |  |  |
Discount rate, measurement input |  | 6.75% |  |  |  |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3602-108585 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI https://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 + Details
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- Definition Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI https://asc.fasb.org/extlink&oid=121556970&loc=d3e13816-109267 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 16 -URI https://asc.fasb.org/extlink&oid=123586518&loc=d3e961-128460 + Details
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