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STOCK-BASED COMPENSATION - Additional Information (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2006
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 5 years |  |  |
Shares available for issuance (shares) | 11,100,000 |  |  |
Closing price of company stock (dollars per share) | $ 133.26 |  |  |
Shares exercised (shares) | 1,777,000 |  |  |
Vesting one year from the grant date |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 1 year |  |  |
Vesting rights percentage | 20.00% |  |  |
Vesting in quarterly installments over the remaining four years |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 4 years |  |  |
Vesting rights percentage | 80.00% |  |  |
Common Stock |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Shares exercised (shares) | 10,000.00 |  |  |
Weighted-average grant-date fair value (in dollars per share) | $ 117.47 |  |  |
Stock options |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Award vesting period | 10 years |  |  |
Grants issued (in shares) | 1,600,000 |  |  |
Intrinsic value of stock options exercised | $ 126,800,000 | $ 63,300,000 | $ 56,800,000 |
Unrecognized stock-based compensation expense, unvested stock options | $ 35,900,000 |  |  |
Weighted-average period of expense recognition | 2 years 3 months 18 days |  |  |
Weighted-average grant-date fair value (in dollars per share) | $ 24.16 | $ 19.10 | $ 18.03 |
RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Unrecognized stock-based compensation expense, unvested stock options | $ 68,600,000 |  |  |
Weighted-average period of expense recognition | 2 years 1 month 6 days |  |  |
Weighted-average grant date fair value of shares granted (dollars per share) | $ 93.68 | $ 66.21 | $ 58.52 |
Fair value of shares vested | $ 108,400,000 | $ 77,000,000.0 | $ 66,500,000 |
Corporate Incentive Compensation Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Vesting rights percentage | 100.00% |  |  |
Percentage of closing price of common stock | 85.00% |  |  |
Corporate Incentive Compensation Plan | RSUs |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Compensation percentage of target incentive compensation eligible to be elected and received by employees | 50.00% |  |  |
2004 Long-Term Incentive Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized (shares) | 36,000,000 |  |  |
Number of shares subject to outstanding options and awards (shares) | 9,900,000 |  |  |
Shares available for issuance (shares) | 10,600,000 |  |  |
2004 Long-Term Incentive Plan | RSUs | Non-employee directors |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Annual limited compensation | $ 500,000 |  |  |
2006 Employee Stock Purchase Plan |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |
Number of shares authorized (shares) |  |  |  | 1,000,000,000,000
Percentage of fair market value of company stock |  |  |  | 85.00%
Purchase price percentage of fair market value |  |  |  | 95.00%
Compensation expense recognized | $ 0 |  |  |
Shares issued (shares) | 500,000 |  |  |
Shares available for issuance (shares) | 500,000 |  |  |

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