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CASH, CASH EQUIVALENTS AND INVESTMENTS - UNRESTRICTED AND RESTRICTED (Details) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash and cash equivalents | $ 407 | $ 360
Total restricted cash, cash equivalents and investments | 1,101 | 1,413
Collateral for workers' compensation claims | 124 | 145
Total | 1,632 | 1,918
Payroll funds collected |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 827 | 1,131
Collateral for health benefits claims |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 147 | 144
Collateral for workers' compensation claims |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 48 | 49
Collateral for workers' compensation claims | 124 | 145
Trust for our HRIS Users |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 78 | 87
Other security deposits |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 1 | 2
Cash and cash equivalents |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash and cash equivalents | 407 | 360
Total restricted cash, cash equivalents and investments | 988 | 1,303
Total | 1,426 | 1,691
Cash and cash equivalents | Payroll funds collected |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 827 | 1,131
Cash and cash equivalents | Collateral for health benefits claims |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 34 | 34
Cash and cash equivalents | Collateral for workers' compensation claims |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 48 | 49
Collateral for workers' compensation claims | 31 | 28
Cash and cash equivalents | Trust for our HRIS Users |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 78 | 87
Cash and cash equivalents | Other security deposits |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 1 | 2
Available-for-sale marketable securities |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Cash and cash equivalents | 0 | 0
Total restricted cash, cash equivalents and investments | 113 | 110
Total | 206 | 227
Available-for-sale marketable securities | Payroll funds collected |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 0 |
Available-for-sale marketable securities | Collateral for health benefits claims |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 113 | 110
Available-for-sale marketable securities | Collateral for workers' compensation claims |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 0 | 0
Collateral for workers' compensation claims | 93 | 117
Available-for-sale marketable securities | Trust for our HRIS Users |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | 0 | 0
Available-for-sale marketable securities | Other security deposits |  |
Restricted Cash and Cash Equivalent Item [Line Items] |  |
Total restricted cash, cash equivalents and investments | $ 0 | $ 0

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- Definition Amount of cash and cash equivalent. Cash includes, but is not limited to, currency on hand, demand deposit with financial institution, and account with general characteristic of demand deposit. Cash equivalent includes, but is not limited to, short-term, highly liquid investment that is both readily convertible to known amount of cash and so near maturity that it presents insignificant risk of change in value because of change in interest rate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(1)) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480566/210-10-S99-1 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Topic 210 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 1 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147483467/210-10-45-1 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-4 + Details
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- Definition Cash and investments whose use in whole or in part is restricted for the long-term, generally by contractual agreements or regulatory requirements. For use in an unclassified balance sheet. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 210 -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Publisher FASB -URI https://asc.fasb.org/1943274/2147477220/954-210-45-4 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 954 -SubTopic 210 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478600/954-210-50-2 + Details
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