| Component: (Network and Table) | |
|---|---|
| Network | 2402406 - Disclosure - Summary of Significant Accounting Policies (Schedule of Useful Lives of Finite Lived Intangible Assets) (Detail) (http://www.comscore.com/role/SummaryOfSignificantAccountingPoliciesScheduleOfUsefulLivesOfFiniteLivedIntangibleAssetsDetail) |
| Table | Schedule of Finite-Lived Intangible Assets [Table] |
| Reporting Entity [Axis] | 0001158172 (http://www.sec.gov/CIK) |
| Period [Axis] | 2012-01-01 - 2012-12-31 |
| Finite-Lived Intangible Assets [Line Items] | Finite-Lived Intangible Assets by Major Class [Axis] | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| Acquired Methodologies Technology [Member] | Customer Relationships [Member] | Panel [Member] | Developed Technology Rights [Member] | Trade Names [Member] | |||||
| Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | Range [Axis] | |||||
| Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | Range [Domain] | Minimum [Member] | Maximum [Member] | Minimum [Member] | Maximum [Member] | |
Finite-lived intangible assets useful life (in years) | P3Y | P10Y | P3Y | P12Y | P7Y | P7Y | P13Y | P2Y | P10Y |