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DESCRIPTION OF BUSINESS AND SIGNIFICANT ACCOUNTING POLICIES - Schedule of Worksite Employee Changes (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2025 | Mar. 31, 2024
Condensed Cash Flow Statements |  |
Accounts receivable, net | $ 1 | $ (1)
Payroll funds receivable |  | 0
Prepaid expenses, net | 7 | (14)
Other payroll assets | 0 | 3
Accounts payable and other liabilities | (11) | 24
Client deposits and other client liabilities | 0 | (4)
Accrued wages | (17) | (28)
Accrued health insurance costs, net | 1 | 0
Accrued workers' compensation costs, net | 2 | 0
Payroll taxes liabilities and other payroll withholdings | (10) | (7)
Net cash used in operating activities |  | (27)
Change in WSE and TriNet Trust related assets and liabilities, net | $ 388 | 213
Net cash used in financing activities |  | (213)
As previously reported |  |
Condensed Cash Flow Statements |  |
Accounts receivable, net |  | 6
Payroll funds receivable |  | (20)
Prepaid expenses, net |  | (12)
Other payroll assets |  | (410)
Accounts payable and other liabilities |  | 20
Client deposits and other client liabilities |  | (14)
Accrued wages |  | 23
Accrued health insurance costs, net |  | (7)
Accrued workers' compensation costs, net |  | 1
Payroll taxes liabilities and other payroll withholdings |  | 173
Net cash used in operating activities |  | (240)
Change in WSE and TriNet Trust related assets and liabilities, net |  | 0
Net cash used in financing activities |  | 0
Reclassified amounts |  |
Condensed Cash Flow Statements |  |
Accounts receivable, net |  | (7)
Payroll funds receivable |  | 20
Prepaid expenses, net |  | (2)
Other payroll assets |  | 413
Accounts payable and other liabilities |  | 4
Client deposits and other client liabilities |  | 10
Accrued wages |  | (51)
Accrued health insurance costs, net |  | 7
Accrued workers' compensation costs, net |  | (1)
Payroll taxes liabilities and other payroll withholdings |  | (180)
Net cash used in operating activities |  | 213
Change in WSE and TriNet Trust related assets and liabilities, net |  | 213
Net cash used in financing activities |  | $ (213)

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