ACQUISITIONS - Summary of the Fair Value of the Net Assets Acquired (Details) - USD ($) $ in Millions	Sep. 01, 2022	Feb. 15, 2022	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Liabilities Assumed
Goodwill			$ 462	$ 462	$ 294
Zenefits
Business Acquisition [Line Items]
Total purchase price		$ 209
Asset Acquired:
Cash		4
Restricted cash		5
Accounts receivable, net		4
Intangible assets		96
Operating lease right-of-use asset		9
Deferred tax asset		2
Other assets		5
Total assets acquired		125
Liabilities Assumed
Accounts payable and other current liabilities		9
Deferred revenue		13
Operating lease liabilities		15
Deferred taxes		18
Total liabilities assumed		55
Net assets acquired		70
Goodwill		139	136
Measurement period adjustments		$ (3)
Clarus
Business Acquisition [Line Items]
Total purchase price	$ 48
Asset Acquired:
Cash	3
Accounts receivable, net	3
Intangible assets	14
Total assets acquired	20
Liabilities Assumed
Accounts payable and other current liabilities	1
Deferred taxes	3
Total liabilities assumed	4
Net assets acquired	16
Goodwill	$ 32		$ 32