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STOCK-BASED COMPENSATION - Expense for performance based shares units (Details) - USD ($) shares in Thousands, $ in Millions | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance share plan expense | $ 24 | $ 10 | $ 12
Performance share plan, shares issued in period | 148 | 505 | 315
Total Stockholder Return |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance share plan expense | $ 6 | $ 5 | $ 5
Performance share plan, shares issued in period | 0 | 165 | 0
Other Performance-Based |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Performance share plan expense | $ 18 | $ 5 | $ 7
Performance share plan, shares issued in period | 148 | 340 | 315

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- Definition Number of shares issued under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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