v3.10.0.1

Commitments and Contingencies (Narrative) (Details) € in Millions, £ in Millions | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |  |  |  |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 31, 2015 EUR (€) | Dec. 31, 2015 USD ($) | Dec. 31, 2015 GBP (£) | Dec. 31, 2015 USD ($) | Jun. 30, 2018 USD ($) | Jun. 30, 2017 USD ($) | Dec. 31, 2017 EUR (€) | Dec. 31, 2017 USD ($) | Dec. 31, 2021 GBP (£) | Dec. 31, 2021 USD ($) | Dec. 31, 2018 GBP (£) | Dec. 31, 2018 USD ($) | Jun. 30, 2018 GBP (£) | Jun. 30, 2018 USD ($) | Dec. 31, 2017 USD ($) | Dec. 31, 2016 GBP (£) | Nov. 26, 2007 association
Interkabel Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Damages sought | € 1,400.0 | $ 1,600,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Interkabel Acquisition [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of associations of municipalities in Belgium | association |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 4
Loss contingency damages in excess value |  |  |  |  |  |  | € 20.0 |  |  |  |  |  |  |  | $ 23,400,000 |  |
Loss contingency accrual |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Deutsche Telekom Litigation [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Damages sought |  |  |  |  |  |  | € 76.0 | $ 89,000,000 |  |  |  |  |  |  |  |  |
Reduction of annual lease fees |  |  |  |  | 83.33% |  | 66.67% | 66.67% |  |  |  |  |  |  |  |  |
Belgium Regulatory Developments [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Percent of reduction in monthly wholesale cable resale access prices |  |  |  |  |  |  |  |  |  |  |  |  | 17.00% | 17.00% |  |  |
Virgin Media VAT Matters [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss contingency accrual |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Virgin Media VAT Matters [Member] | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible loss |  |  |  |  |  |  |  |  |  |  |  |  | £ 47.0 | 62,000,000 |  |  |
Virgin Media VAT Matters 2 [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible loss | £ |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | £ 63.7 |
Loss contingency accrual |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |
Continuing operations |  |  | £ 67.0 | $ 99,100,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Interest expense | £ |  |  | £ 3.3 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other Regulatory Issues [Member] | Maximum | Forecast | U.K. |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Estimate of possible loss |  |  |  |  |  |  |  |  | £ 110.0 | $ 145,000,000 | £ 18.0 | $ 24,000,000 |  |  |  |  |
Broadband Communications and DHT Operations [Member] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Loss Contingencies [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Programming costs |  |  |  |  | $ 805,100,000 | $ 720,000,000.0 |  |  |  |  |  |  |  |  |  |  |

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