Recently Issued Accounting Standards (Details) $ in Millions	Dec. 31, 2015 USD ($)
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Debt Issuance Costs Reclassified	$ 8.0

Debt issuance costs reclassified from "Other non-current assets" to "Long term debt, less current portion" pursuant to the issuance of ASU 2015-03 by FASB in April 2015.

No definition available.

Name:	cbb_DebtIssuanceCostsReclassified
Namespace Prefix:	cbb_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant