General Information (Details)	6 Months Ended
Jun. 30, 2018 item
General Information
Number of markets in which high-speed data, video, and telephony services are provided	19

Represents the number of markets in which services are provided by the entity.

No definition available.

Name:	wow_NumberOfMarketsInWhichServicesAreProvided
Namespace Prefix:	wow_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration