| Component: (Network and Table) | |
|---|---|
| Network | 100830 - Disclosure - Supplemental Information - Schedule of Long-Lived Assets by Location (Details) (http://www.novocure.com/20161231/taxonomy/role/DisclosureSupplementalInformationScheduleOfLongLivedAssetsByLocationDetails) |
| Table | Schedule Of Revenues From External Customers And Long Lived Assets [Table] |
| Reporting Entity [Axis] | 0001645113 (http://www.sec.gov/CIK) |
| Revenues From External Customers And Long Lived Assets [Line Items] | Period [Axis] | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
2016-12-31 | 2015-12-31 | |||||||||
| Geographical | Geographical | |||||||||
| United States | Switzerland | Israel | Others | Geographical | United States | Switzerland | Israel | Others | Geographical | |
Long-lived assets | ||||||||||