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INCOME TAXES - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 15, 2022
Income Taxes Disclosure [Line Items]
Increased in effective income tax rate	3.00%
Effective income tax rate	26.00%	23.00%	24.00%
Net operating losses (federal and state)	$ 7	$ 3
Tax credits (federal, state and foreign)	7	6
Excess tax benefits	13	10	$ 9
Capital Loss Carryforward
Income Taxes Disclosure [Line Items]
State tax credit carryforwards	3
Zenefits
Income Taxes Disclosure [Line Items]
Net operating losses (federal and state)				$ 158
Tax credits (federal, state and foreign)				11
Valuation allowances of net operating losses (federal and state)				149
Valuation allowance related to tax credit carryforwards (federal, state and foreign)				$ 9
2019 Equity Incentive Plan
Income Taxes Disclosure [Line Items]
Excess tax benefits	3
Federal
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	2
State and Local Jurisdiction
Income Taxes Disclosure [Line Items]
Net operating loss carryforwards	94	45
State tax credit carryforwards	5	$ 6
Canada
Income Taxes Disclosure [Line Items]
State tax credit carryforwards	$ 2

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