XML 23 R38.htm IDEA: XBRL DOCUMENT
v3.19.3

Accrued Workers' Compensation Cost - Additional Information (Details) - USD ($) $ in Millions | Sep. 30, 2019 | Dec. 31, 2018
--- | --- | ---
Insurance [Abstract] |  |
Collateral held by insurance carriers | $ 56 | $ 57
Liability for unpaid claims and claims adjustment expense, collateral | 12 | 13
Accrued health insurance costs, net current | 3 | 3
Accrued health insurance costs, net noncurrent | $ 9 | $ 10

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 Collateral Paid to Insurance Carriers, Net of Workers' Compensation Loss Reserves, Current + References No definition available. + Details
Name: | tnet_CollateralPaidToInsuranceCarriersNetOfWorkersCompensationLossReservesCurrent
Namespace Prefix: | tnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Collateral Paid To Insurance Carriers, Net Of Workers' Compensation Loss Reserves, Noncurrent + References No definition available. + Details
Name: | tnet_CollateralPaidToInsuranceCarriersNetOfWorkersCompensationLossReservesNoncurrent
Namespace Prefix: | tnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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