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CASH, CASH EQUIVALENTS AND INVESTMENTS - UNRESTRICTED AND RESTRICTED (Tables) | 6 Months Ended
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Jun. 30, 2025
Cash and Cash Equivalents [Abstract] |
Schedule of Cash, Cash Equivalents and Investments | Our total cash, cash equivalents and investments are summarized below:
| June 30, 2025 |  | December 31, 2024
(in millions) | Cash and cash equivalents | Available-for-sale marketable securities |  | Total |  | Cash and cash equivalents | Available-for-sale marketable securities |  | Total
Cash and cash equivalents | $ | 407 |  | $ | — |  |  | $ | 407 |  |  | $ | 360 |  | $ | — |  |  | $ | 360 |
Restricted cash, cash equivalents and investments: |  |  |  |  |  |  |  |  |
Payroll funds collected | 827 |  | — |  |  | 827 |  |  | 1,131 |  |  |  | 1,131 |
Collateral for health benefits claims | 34 |  | 113 |  |  | 147 |  |  | 34 |  | 110 |  |  | 144 |
Collateral for workers' compensation claims | 48 |  | — |  |  | 48 |  |  | 49 |  | — |  |  | 49 |
Trust for our HRIS Users | 78 |  | — |  |  | 78 |  |  | 87 |  | — |  |  | 87 |
Other security deposits | 1 |  | — |  |  | 1 |  |  | 2 |  | — |  |  | 2 |
Total restricted cash, cash equivalents and investments | 988 |  | 113 |  |  | 1,101 |  |  | 1,303 |  | 110 |  |  | 1,413 |
Restricted cash, cash equivalents and investments, noncurrent |  |  |  |  |  |  |  |  |
Collateral for workers' compensation claims | 31 |  | 93 |  |  | 124 |  |  | 28 |  | 117 |  |  | 145 |
Total | $ | 1,426 |  | $ | 206 |  |  | $ | 1,632 |  |  | $ | 1,691 |  | $ | 227 |  |  | $ | 1,918 |

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- Definition Tabular disclosure of cash, cash equivalent, and investment. + References No definition available. + Details
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