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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 3 Months Ended
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Mar. 31, 2022 | Mar. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (in shares) | 337,790 |
Grant date intrinsic value (in dollars per share) | $ 59 |
Restricted stock units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (in shares) | 581,660 | 1,000,000
Granted (in dollars per share) | $ 59 | $ 56
unrecognized compensation expense | $ 30 | $ 23
Weighted average remaining vesting period | 2 years | 2 years
Total market value (at the vesting date) of stock award shares | $ 18 | $ 7
Forfeited (in shares) | 0 | 0
Long-term stock awards |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted average remaining vesting period | 2 years | 2 years
Total market value (at the vesting date) of stock award shares | $ 20 | $ 26
Forfeited (in shares) | 0 | 0
Total unrecognized compensation expense | $ 8 | $ 18
Performance restricted stock units |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Period for recognition | 3 years |
Performance restricted stock units | LTIP Program |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Granted (in shares) | 91,820 | 85,360
Granted (in dollars per share) | $ 55 | $ 53
Shares issued in period (in shares) | 167,903 | 104,757
Forfeited (in shares) | 0 | 0
Stock options |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Weighted average remaining vesting period | 2 years | 2 years
Granted (in shares) | 0 | 1,000,000
Total unrecognized compensation expense | $ 4 | $ 6

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- Definition Amount of cost not yet recognized for nonvested award 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 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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- Definition Weighted-average period over which cost not yet recognized is expected to be recognized for award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. + 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 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
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