Business and Summary of Significant Accounting Principles (Depreciation) (Details)	12 Months Ended
	Dec. 31, 2012
Technology Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	5 years
Technology Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	20 years
Fiber optic cable systems [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	15 years
Fiber optic cable systems [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	25 years
Cable transmission equipment and distribution facilities [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	5 years
Cable transmission equipment and distribution facilities [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	30 years
Support equipment and systems [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	3 years
Support equipment and systems [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	20 years
Transportation Equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	5 years
Transportation Equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	13 years
Assets Held under Capital Leases [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	12 years
Assets Held under Capital Leases [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	20 years
Building [Member] | Weighted Average [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	25 years
Customer premise equipment [Member] | Minimum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	2 years
Customer premise equipment [Member] | Maximum [Member]
Property, Plant and Equipment [Line Items]
Property Plant And Equipment Useful Life	20 years