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CASH, CASH EQUIVALENTS AND INVESTMENTS - UNRESTRICTED AND RESTRICTED - (Tables) | 6 Months Ended
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Jun. 30, 2023
Cash and Cash Equivalents [Abstract] |
Schedule of Cash, Cash Equivalents and Investments | Our total cash, cash equivalents and investments are summarized below:
| June 30, 2023 |  | December 31, 2022
(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 | $ | 482 |  | $ | — |  |  | $ | 482 |  |  | $ | 354 |  | $ | — |  |  | $ | 354 |
Investments | — |  | 69 |  |  | 69 |  |  | — |  | 76 |  |  | 76 |
Restricted cash, cash equivalents and investments: |  |  |  |  |  |  |  |  |
Payroll funds collected | 875 |  | — |  |  | 875 |  |  | 1,062 |  | — |  |  | 1,062 |
Collateral for health benefits claims | 31 |  | 110 |  |  | 141 |  |  | 29 |  | 110 |  |  | 139 |
Collateral for workers' compensation claims | 55 |  | — |  |  | 55 |  |  | 58 |  | — |  |  | 58 |
Other security deposits | 3 |  | — |  |  | 3 |  |  | 4 |  | — |  |  | 4 |
Total restricted cash, cash equivalents and investments | 964 |  | 110 |  |  | 1,074 |  |  | 1,153 |  | 110 |  |  | 1,263 |
Investments, noncurrent | — |  | 146 |  |  | 146 |  |  | — |  | 151 |  |  | 151 |
Restricted cash, cash equivalents and investments, noncurrent |  |  |  |  |  |  |  |  |
Collateral for workers' compensation claims | 24 |  | 130 |  |  | 154 |  |  | 27 |  | 123 |  |  | 150 |
Other security deposits | 3 |  | — |  |  | 3 |  |  | 3 |  | — |  |  | 3 |
Total | $ | 1,473 |  | $ | 455 |  |  | $ | 1,928 |  |  | $ | 1,537 |  | $ | 460 |  |  | $ | 1,997 |

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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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