XML 41 R1.htm IDEA: XBRL DOCUMENT v3.10.0.1
Document and Entity Information - USD ($)
$ in Billions
 12 Months Ended
Dec. 31, 2018
Feb. 07, 2019
Jun. 30, 2018
Document And Entity Information [Abstract]      
Entity Registrant Name TRINET GROUP INC    
Trading Symbol TNET    
Entity Central Index Key 0000937098    
Current Year End Date --12-31    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Filer Category Large Accelerated Filer    
Document Type 10-K    
Document Period End Date Dec. 31, 2018    
Document Year Focus 2018    
Document Period Focus (i.e. Q1,Q2,Q3,FY) FY    
Amendment Flag false    
Entity Common Stock, Shares Outstanding   70,170,155  
Entity Public Float     $ 2.5
Entity Shell Company false    
Entity Voluntary Filers No    
Entity Well Known Seasoned Issuer Yes    
Entity Current Reporting Status Yes