v3.20.2

Commitments and Contingencies (Details) $ in Millions | Sep. 30, 2020 USD ($)
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Commitments and Contingencies Disclosure [Abstract] |
Additional investment in educational technology, contingent payment | $ 5.0

X
- Definition Additional Investment In Educational Technology, Contingent Payment + References No definition available. + Details
Name: | twou_AdditionalInvestmentInEducationalTechnologyContingentPayment
Namespace Prefix: | twou_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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