| **Business and Summary of Significant Accounting Principles (Depreciation) (Details)** | 12 Months Ended |
|----------------------------------------------------------------------------------------|-----------------|
||
| 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        |

| X                                                                                                                                                                      |
|------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Details**Name:**us-gaap_PropertyPlantAndEquipmentLineItems**Namespace Prefix:**us-gaap_**Data Type:**xbrli:stringItemType**Balance Type:**na**Period Type:**duration |
| X                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           |
|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| - Definition
Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment.
+ References
No definition available.
+ Details**Name:**us-gaap_PropertyPlantAndEquipmentUsefulLife**Namespace Prefix:**us-gaap_**Data Type:**xbrli:durationItemType**Balance Type:**na**Period Type:**duration |