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v3.19.2

Description of Business and Significant Accounting Policies - Effects on cash flow due to new accounting pronouncements (Details) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Jun. 30, 2019 | Jun. 30, 2018
Operating activities |  |
Accounts receivable | $ 3 | $ 11
Unbilled revenue | (36) | 35
Prepaid income taxes |  | 0
Prepaid expenses and other current assets |  | 0
Prepaid expenses | (18) | (9)
Workers' compensation collateral receivable |  | 0
Accounts payable and other current liabilities | (11) | (28)
Client deposits | 10 | (24)
Accrued wages | 25 | (28)
Accrued corporate wages |  | 0
Accrued health insurance costs | (13) | (13)
Accrued workers' compensation costs | 9 | (8)
Workers' compensation loss reserves and other non-current liabilities |  | 0
Payroll taxes payable and other payroll withholdings |  | (588)
Worksite employee related assets |  | 0
Worksite employee related liabilities |  | 0
Other assets | (30) | (45)
Other liabilities | $ (2) | (1)
As previously reported |  |
Operating activities |  |
Accounts receivable |  | 0
Unbilled revenue |  | 0
Prepaid income taxes |  | 2
Prepaid expenses and other current assets |  | (23)
Prepaid expenses |  | 0
Workers' compensation collateral receivable |  | (6)
Accounts payable and other current liabilities |  | (14)
Client deposits |  | 0
Accrued wages |  | 0
Accrued corporate wages |  | (5)
Accrued health insurance costs |  | 0
Accrued workers' compensation costs |  | 0
Workers' compensation loss reserves and other non-current liabilities |  | (4)
Payroll taxes payable and other payroll withholdings |  | 0
Worksite employee related assets |  | 4
Worksite employee related liabilities |  | (652)
Other assets |  | 0
Other liabilities |  | 0
Reclassified amounts |  |
Operating activities |  |
Accounts receivable |  | 11
Unbilled revenue |  | 35
Prepaid income taxes |  | (2)
Prepaid expenses and other current assets |  | 23
Prepaid expenses |  | (9)
Workers' compensation collateral receivable |  | 6
Accounts payable and other current liabilities |  | (14)
Client deposits |  | (24)
Accrued wages |  | (28)
Accrued corporate wages |  | 5
Accrued health insurance costs |  | (13)
Accrued workers' compensation costs |  | (8)
Workers' compensation loss reserves and other non-current liabilities |  | 4
Payroll taxes payable and other payroll withholdings |  | (588)
Worksite employee related assets |  | (4)
Worksite employee related liabilities |  | 652
Other assets |  | (45)
Other liabilities |  | $ (1)

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