v2.4.0.8

Summary of Significant Accounting Policies (Details 2) | 6 Months Ended
--- | ---
Jun. 30, 2014
Minimum |
Revenue Recognition and Deferred Revenue |
Period to derive revenue under long-term contracts | 10 years
Maximum |
Revenue Recognition and Deferred Revenue |
Period to derive revenue under long-term contracts | 15 years

X
- Definition Represents the period to derive revenue under long-term contracts. + References No definition available. + Details
Name: | twou_PeriodToDeriveRevenueUnderLongTermContracts
Namespace Prefix: | twou_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | twou_RevenueRecognitionLineItems
Namespace Prefix: | twou_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration