The Company	3 Months Ended
Mar. 31, 2017
Organization, Consolidation and Presentation of Financial Statements [Abstract]
The Company	The Company Description of the Company Actua Corporation (together with its subsidiaries, "Actua"), which was formed on March 4, 1996, is a multi-vertical cloud technology company with offerings that it believes create unique and compelling value for its customers and provide transformative efficiency to vertical markets worldwide. As of March 31, 2017, Actua owned three businesses, each of which addresses the needs of a specific vertical market or industry: BOLT Solutions, Inc. ("Bolt"), FolioDynamics Holdings, Inc. ("FolioDynamix") and VelocityEHS Holdings, Inc. ("VelocityEHS"). Please refer to Item 1, "Business," in Actua’s Annual Report on Form 10-K for the year ended December 31, 2016 for a more detailed description of Actua and its businesses. Basis of Presentation On October 18, 2016, the sale of GovDelivery Holdings, Inc. ("GovDelivery") to affiliates of Vista Equity Partners ("Vista") (such transaction, the "GovDelivery Sale") was consummated. Accordingly, the financial results and financial position of GovDelivery are presented as discontinued operations in the Consolidated Financial Statements for all periods presented. The Consolidated Financial Statements contained herein (the "Consolidated Financial Statements") include the accounts of Actua Corporation and its wholly-owned subsidiaries and majority-owned subsidiaries.

The Company

3 Months Ended

Mar. 31, 2017

Organization, Consolidation and Presentation of Financial Statements [Abstract]

Description of the Company

Actua Corporation (together with its subsidiaries, "Actua"), which was formed on March 4, 1996, is a multi-vertical cloud technology company with offerings that it believes create unique and compelling value for its customers and provide transformative efficiency to vertical markets worldwide. As of March 31, 2017, Actua owned three businesses, each of which addresses the needs of a specific vertical market or industry: BOLT Solutions, Inc. ("Bolt"), FolioDynamics Holdings, Inc. ("FolioDynamix") and VelocityEHS Holdings, Inc. ("VelocityEHS").

Please refer to Item 1, "Business," in Actua’s Annual Report on Form 10-K for the year ended December 31, 2016 for a more detailed description of Actua and its businesses.

Basis of Presentation

On October 18, 2016, the sale of GovDelivery Holdings, Inc. ("GovDelivery") to affiliates of Vista Equity Partners ("Vista") (such transaction, the "GovDelivery Sale") was consummated. Accordingly, the financial results and financial position of GovDelivery are presented as discontinued operations in the Consolidated Financial Statements for all periods presented.

The Consolidated Financial Statements contained herein (the "Consolidated Financial Statements") include the accounts of Actua Corporation and its wholly-owned subsidiaries and majority-owned subsidiaries.