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ACQUISITIONS - Summary of the Fair Value of the Net Assets Acquired (Details) - USD ($) $ in Millions | Sep. 01, 2022 | Feb. 15, 2022 | Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | --- | --- | --- | ---
Liabilities Assumed |  |  |  |  |
Goodwill |  |  | $ 462 | $ 462 | $ 294
Zenefits |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total purchase price |  | $ 209 |  |  |
Asset Acquired: |  |  |  |  |
Cash |  | 4 |  |  |
Restricted cash |  | 5 |  |  |
Accounts receivable, net |  | 4 |  |  |
Intangible assets |  | 96 |  |  |
Operating lease right-of-use asset |  | 9 |  |  |
Deferred tax asset |  | 2 |  |  |
Other assets |  | 5 |  |  |
Total assets acquired |  | 125 |  |  |
Liabilities Assumed |  |  |  |  |
Accounts payable and other current liabilities |  | 9 |  |  |
Deferred revenue |  | 13 |  |  |
Operating lease liabilities |  | 15 |  |  |
Deferred taxes |  | 18 |  |  |
Total liabilities assumed |  | 55 |  |  |
Net assets acquired |  | 70 |  |  |
Goodwill |  | 139 | 136 |  |
Measurement period adjustments |  | $ (3) |  |  |
Clarus |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Total purchase price | $ 48 |  |  |  |
Asset Acquired: |  |  |  |  |
Cash | 3 |  |  |  |
Accounts receivable, net | 3 |  |  |  |
Intangible assets | 14 |  |  |  |
Total assets acquired | 20 |  |  |  |
Liabilities Assumed |  |  |  |  |
Accounts payable and other current liabilities | 1 |  |  |  |
Deferred taxes | 3 |  |  |  |
Total liabilities assumed | 4 |  |  |  |
Net assets acquired | 16 |  |  |  |
Goodwill | $ 32 |  | $ 32 |  |

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