Income Taxes - (Benefit) Expense (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Taxes
Income tax (benefit) expense	$ 4.3	$ 2.8	$ 4.1	$ 3.7

Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing and discontinued operations.

No definition available.

Name:	wow_IncomeTaxExpenseBenefitIncludingDiscontinuedOperations
Namespace Prefix:	wow_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration