Business and Summary of Significant Accounting Principles (Depreciation) (Details)	12 Months Ended
	Dec. 31, 2014
Technology Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Technology Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	20 years
Fiber optic cable systems | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	15 years
Fiber optic cable systems | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	25 years
Cable transmission equipment and distribution facilities | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Cable transmission equipment and distribution facilities | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	30 years
Support equipment and systems | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	3 years
Support equipment and systems | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	20 years
Transportation Equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	5 years
Transportation Equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	13 years
Assets Held under Capital Leases | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	12 years
Assets Held under Capital Leases | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	20 years
Building
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	25 years
Customer premise equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	2 years
Customer premise equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	20 years
Studio equipment | Minimum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	10 years
Studio equipment | Maximum
Property, Plant and Equipment [Line Items]
Property plant and equipment useful life	15 years