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Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2024

Accounting Policies [Abstract]

Activity and balances related to incurred but not paid workers' compensation claims

The following table provides the activity and balances related to incurred but not paid workers’ compensation claims:

			Year Ended December 31,
(in millions)			2024						2023
Beginning balance, January 1,			$	220					$	229
Accrued claims, net			65						61
Present value discount, net of accretion			(12)						(13)
Paid claims			(69)						(57)
Ending balance			$	204					$	220
Current portion of accrued claims			$	69					$	57
Long-term portion of accrued claims			135						163
Total accrued claims			$	204					$	220

Disaggregation of Revenue [Table Text Block]

Our revenue for our PEO HR Outsourcing Solutions by geographic region and for our other products and services offerings are as follows:

			Year Ended December 31,
(in millions)			2024			2023			2022
Northeast			$	1,801		$	1,757		$	1,625
Southeast			926			907			796
Central			1,195			1,170			1,045
Southwest			1,245			1,250			1,163
West			1,344			1,337			1,251
			6,511			6,421			5,880
Other revenue			70			65			59
Total revenue			$	6,581		$	6,486		$	5,939

Revenues Comprise of Gross Billings and WSEE Payroll Cost [Table]

Revenues are comprised of gross billings less WSEE payroll costs as follows:

			Year Ended December 31,
(in millions)			2024			2023			2022
Gross billings			$	43,752		$	43,141		$	40,127
Less: WSEE payroll cost			37,171			36,655			34,188
Revenues			$	6,581		$	6,486		$	5,939

Property, Plant and Equipment [Table Text Block]

Property and equipment, net consisted of the following:

(in millions)			December 31, 2024			December 31, 2023
Land			$	6		$	6
Buildings and improvements			225			217
Computer hardware and software			145			145
Software development costs			149			137
Furniture, fixtures and other			56			53
Property and equipment, gross			581			558
Accumulated depreciation and amortization			(389)			(361)
Property and equipment, net			$	192		$	197

Depreciation, Depletion, and Amortization [Policy Text Block]

The estimated useful lives of property and equipment for purposes of computing depreciation are as follows:

			Useful Life
Buildings and improvements			4			—			30			years
Computer hardware and software			2			—			5			years
Software development costs			3			—			5			years
Furniture, fixtures and other			5			—			7			years

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