XML 79 R35.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Accrued Workers' Compensation Costs - Narrative (Details) - USD ($) $ in Millions | Sep. 30, 2022 | Dec. 31, 2021
--- | --- | ---
Insurance [Abstract] |  |
Collateral held by insurance carriers | $ 43 | $ 43
Liability for unpaid claims and claims adjustment expense, collateral | $ 8 | $ 8

X
- Definition Collateral Held by Insurance Carriers + References No definition available. + Details
Name: | tnet_CollateralHeldByInsuranceCarriers
Namespace Prefix: | tnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Liability for Unpaid Claims and Claims Adjustment Expense, Collateral + References No definition available. + Details
Name: | tnet_LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseCollateral
Namespace Prefix: | tnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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