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CASH, CASH EQUIVALENTS AND INVESTMENTS - UNRESTRICTED AND RESTRICTED (Tables) | 6 Months Ended
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Jun. 30, 2024
Cash and Cash Equivalents [Abstract] |
Schedule of Cash, Cash Equivalents and Investments | Our total cash, cash equivalents and investments are summarized below:
| June 30, 2024 |  | December 31, 2023
(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 | $ | 177 |  | $ | — |  |  | $ | 177 |  |  | $ | 287 |  | $ | — |  |  | $ | 287 |
Investments | — |  | 72 |  |  | 72 |  |  | — |  | 65 |  |  | 65 |
Restricted cash, cash equivalents and investments: |  |  |  |  |  |  |  |  |
Payroll funds collected | 605 |  | — |  |  | 605 |  |  | 1,067 |  | — |  |  | 1,067 |
Collateral for health benefits claims | 34 |  | 113 |  |  | 147 |  |  | 31 |  | 113 |  |  | 144 |
Collateral for workers' compensation claims | 48 |  | — |  |  | 48 |  |  | 54 |  | 2 |  |  | 56 |
Trust for our HRIS Users | 91 |  | — |  |  | 91 |  |  | — |  | — |  |  | — |
Other security deposits | 2 |  | — |  |  | 2 |  |  | 2 |  | — |  |  | 2 |
Total restricted cash, cash equivalents and investments | 780 |  | 113 |  |  | 893 |  |  | 1,154 |  | 115 |  |  | 1,269 |
Investments, noncurrent | — |  | 156 |  |  | 156 |  |  | — |  | 143 |  |  | 143 |
Restricted cash, cash equivalents and investments, noncurrent |  |  |  |  |  |  |  |  |
Collateral for workers' compensation claims | 37 |  | 126 |  |  | 163 |  |  | 25 |  | 133 |  |  | 158 |
Total | $ | 994 |  | $ | 467 |  |  | $ | 1,461 |  |  | $ | 1,466 |  | $ | 456 |  |  | $ | 1,922 |

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- Definition Tabular disclosure of the components of cash, cash equivalents, and investments. + References No definition available. + Details
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