XML 82 R41.htm IDEA: XBRL DOCUMENT
v3.21.1

Commitments and Contingencies - Narrative (Details) | Sep. 29, 2020 retirementPlan
--- | ---
Commitments and Contingencies Disclosure [Abstract] |
Number of retirement plans subject to class action | 2

X
- Definition Number Of Retirement Plans Subject To Class Action + References No definition available. + Details
Name: | tnet_NumberOfRetirementPlansSubjectToClassAction
Namespace Prefix: | tnet_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration