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STOCK COMPENSATION - ADDITIONAL INFORMATION (Details) shares in Millions, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2021 USD ($) shares | Dec. 31, 2020 USD ($) | Dec. 31, 2019 USD ($) | Dec. 31, 2016 shares
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] |  |  |  |
Conversion ratio for RSUs and restricted stock | 3.09 |  |  |
Intrinsic value of options exercised | $ | $ 16 | $ 3 | $ 37 |
Total fair value of share vested during the period | $ | $ 76 | $ 54 | $ 44 |
Weighted average remaining contractual life (in years) | 5 years 7 months 6 days |  |  |
Weighted average remaining contractual term of exercisable options (in years) | 4 years 2 months 12 days |  |  |
Equity Incentive Plan 2016 |  |  |  |
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] |  |  |  |
Authorized grants under the plan (in shares) | shares |  |  |  | 25.0
Number of shares available for grant (in shares) | shares | 20.0 |  |  |
Tax Year 2016 | Key Employee |  |  |  |
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] |  |  |  |
Cap on restricted stock or RSU (in shares) | shares | 1.0 |  |  |
Nonqualified Plan |  |  |  |
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] |  |  |  |
Number of unvested stock options (in shares) | shares | 1.0 |  |  |
Unamortized compensation costs | $ | $ 9 |  |  |
Weighted average period for cost recognition | 1 year 9 months 18 days |  |  |
Restricted Stock Units (RSUs) |  |  |  |
Schedule of Share based Compensation Arrangements by Share based Payment Award, Equity Instruments, Other Than Options, Restricted Stock Units [Line Items] |  |  |  |
Unamortized compensation costs | $ | $ 42 |  |  |
Weighted average period for cost recognition | 2 years |  |  |

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