XML 51 R26.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Description of Business and Significant Accounting Policies - Summary of Amounts Capitalized and Amortized (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2018 | Sep. 30, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Capitalized deferred commission costs | $ 8 | $ 24
Amortized deferred commission costs | $ 2 | $ 3

X
- Definition Capitalized Contract Cost, Amount Capitalized + References No definition available. + Details
Name: | tnet_CapitalizedContractCostAmountCapitalized
Namespace Prefix: | tnet_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 340 -SubTopic 40 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=68051541&loc=SL49131252-203054 + Details
Name: | us-gaap_CapitalizedContractCostAmortization
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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