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EQUITY AND EQUITY COMPENSATION - Narrative (Details) - USD ($) $ / shares in Units, $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
Class of Stock [Line Items] |  |  |  |
Capital stock, shares authorized (shares) | 2,000,000,000 |  |  |
Common stock, authorized (shares) | 1,500,000,000 | 1,500,000,000 |  |
Common stock, par value (USD per share) | $ 0.0001 | $ 0.0001 |  |
Preferred stock, shares authorized (shares) | 500,000,000 |  |  |
Treasury stock weighted average cost per share (USD per share) | $ 30.37 | $ 29.73 |  |
Grant payments received through payroll support program | $ 4,500 |  |  |
Number of shares authorized for issuance under the Plan (shares) | 163,000,000 |  |  |
Shares available for future grant (in shares) | 13,000,000 |  |  |
Equity compensation expense | $ 180 | $ 150 | $ 149 |
Compensation cost not yet recognized | $ 103 |  |  |
Outstanding stock option awards (shares) | 6,200,000 | 6,200,000 | 6,200,000 | 5,400,000
Weighted average exercise price of options outstanding (USD per share) | $ 50.42 | $ 50.40 | $ 50.41 | $ 52.37
Number of exercisable stock option awards (shares) | 5,900,000 |  |  |
Restricted stock awards |  |  |  |
Class of Stock [Line Items] |  |  |  |
Unvested restricted stock awards (shares) | 4,200,000 | 3,100,000 | 2,900,000 | 2,200,000
Stock options |  |  |  |
Class of Stock [Line Items] |  |  |  |
Term of award (in years) | 10 years |  |  |
Performance awards |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares available for future grant (in shares) |  | 700,000 | 1,500,000 |
Performance period (in years) | 3 years |  |  |
Performance awards | Minimum |  |  |  |
Class of Stock [Line Items] |  |  |  |
Potential performance award payments as percentage of target level | 0.00% |  |  |
Performance awards | Maximum |  |  |  |
Class of Stock [Line Items] |  |  |  |
Potential performance award payments as percentage of target level | 200.00% |  |  |
Performance-Based Restricted Stock Units |  |  |  |
Class of Stock [Line Items] |  |  |  |
Shares available for future grant (in shares) | 3,300,000 | 1,300,000 |  |
Performance period (in years) | 3 years |  |  |
Performance-Based Restricted Stock Units | Minimum |  |  |  |
Class of Stock [Line Items] |  |  |  |
Potential performance award payments as percentage of target level | 0.00% |  |  |
Performance-Based Restricted Stock Units | Maximum |  |  |  |
Class of Stock [Line Items] |  |  |  |
Potential performance award payments as percentage of target level | 300.00% |  |  |
PSP Warrants | Payroll Support Program |  |  |  |
Class of Stock [Line Items] |  |  |  |
Number shares called by warrants (in shares) |  |  | 11,100,000 | 11,100,000

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