Cover - shares	3 Months Ended
	Mar. 31, 2023	Apr. 19, 2023
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2023
Document Transition Report	false
Entity File Number	001-36373
Entity Registrant Name	TRINET GROUP, INC.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	95-3359658
Entity Address, Address Line One	One Park Place,
Entity Address, Address Line Two	Suite 600
Entity Address, City or Town	Dublin,
Entity Address, State or Province	CA
Entity Address, Postal Zip Code	94568
City Area Code	510
Local Phone Number	352-5000
Title of 12(b) Security	Common stock par value $0.000025 per share
Trading Symbol	TNET
Security Exchange Name	NYSE
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		59,414,936
Entity Central Index Key	0000937098
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	Q1
Amendment Flag	false