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SHARE-BASED COMPENSATION - Summary of Share-based Compensation Expense (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
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Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Components and classification of share-based compensation expense |  |  |  |
Share-based compensation expense | $ 26 | $ 31 | $ 58 | $ 62
Research and development expenses |  |  |  |
Components and classification of share-based compensation expense |  |  |  |
Share-based compensation expense | 3 | 2 | 6 | 5
Selling, general and administrative expenses |  |  |  |
Components and classification of share-based compensation expense |  |  |  |
Share-based compensation expense | 23 | 29 | 52 | 57
Stock options |  |  |  |
Components and classification of share-based compensation expense |  |  |  |
Share-based compensation expense | 3 | 3 | 7 | 7
RSUs |  |  |  |
Components and classification of share-based compensation expense |  |  |  |
Share-based compensation expense | $ 23 | $ 28 | $ 51 | $ 55

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- Definition Amount of expense for award under share-based payment arrangement. Excludes amount capitalized. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1)(i) -URI https://asc.fasb.org/extlink&oid=128089324&loc=d3e5070-113901 + Details
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