v3.10.0.1

Share-based Compensation (Narrative) (Details) $ / shares in Units, $ in Millions |  | 12 Months Ended |  |
--- | --- | --- | --- | ---
Apr. 30, 2014 installment shares | Dec. 31, 2018 USD ($) installment $ / shares shares | Dec. 31, 2017 $ / shares shares | Dec. 31, 2016 shares | Dec. 31, 2015 shares | Dec. 31, 2018 € / shares | Jun. 24, 2013 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Percent of annual inventive compensation |  | 100.00% |  |  |  |  |
Total compensation expense not yet recognized | $ |  | $ 246.7 |  |  |  |  |
Weighted average period remaining for expense recognition |  | 2 years 1 month 6 days |  |  |  |  |
Options | Class A |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Awards outstanding (in shares) |  | 580,254 | 580,481 |  |  |  |
Awards outstanding (in EUR/USD per share) | $ / shares |  | $ 27.51 | $ 25.54 |  |  |  |
Options exercisable and end of period (in shares) |  | 417,608 |  |  |  |  |
Options | Class C |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Awards outstanding (in shares) |  | 2,667,506 | 2,725,566 |  |  |  |
Awards outstanding (in EUR/USD per share) | $ / shares |  | $ 25.09 | $ 25.58 |  |  |  |
Options exercisable and end of period (in shares) |  | 2,161,408 |  |  |  |  |
PSUs | Class A |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) |  | 1,177,392 |  |  |  |  |
PSUs | Class C |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) |  | 2,354,784 |  |  |  |  |
April 1 and October 1 of 2017 | PSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  |  | 50.00% |  |  |  |
Performance period |  |  | 2 years |  |  |  |
PSUs earned |  |  | 99.50% |  |  |  |
April 1, 2019 and October 1, 2019 | PSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  | 50.00% |  |  |  |  |
Performance period |  | 3 years |  |  |  |  |
Adjusted OIBDA CAGR |  | 6.00% |  |  |  |  |
Liberty Global Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share authorized (in shares) |  | 46,220,904 |  |  |  |  |
Liberty Global Incentive Plan | Awards other than Performance-Based Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award term |  | 7 years |  |  |  |  |
Liberty Global Incentive Plan | Six Month Anniversary After Grant Date |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  | 12.50% |  |  |  |  |
Liberty Global Incentive Plan | Each Quarter Thereafter after Six Month Vest |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  | 6.25% |  |  |  |  |
Liberty Global Director Incentive Plan |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share authorized (in shares) |  | 9,108,222 |  |  |  |  |
Award term |  | 7 years |  |  |  |  |
Number of equal or semi-equal installments | installment |  | 3 |  |  |  |  |
2018 PSUs | PSUs | Minimum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Performance range |  | 50.00% |  |  |  |  |
Expected performance earnings for PSUs |  | 50.00% |  |  |  |  |
2018 PSUs | PSUs | Maximum |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Performance range |  | 125.00% |  |  |  |  |
Expected performance earnings for PSUs |  | 150.00% |  |  |  |  |
2018 PSUs | April 1, 2020 | PSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  | 50.00% |  |  |  |  |
2018 PSUs | October 1, 2020 | PSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  | 50.00% |  |  |  |  |
Liberty Global 2014 Incentive Plans |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share authorized (in shares) |  | 105,000,000 |  |  |  |  |
Liberty Global 2014 Incentive Plans | Class B |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share authorized (in shares) |  | 50,250,000 |  |  |  |  |
Liberty Global 2014 Incentive Plans | Anti-Dilution and Other Adjustment Provisions |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Share authorized (in shares) |  | 10,500,000 |  |  |  |  |
Liberty Global Performance Grant Award | PSUs |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of equal or semi-equal installments | installment | 3 |  |  |  |  |  |
Liberty Global Performance Grant Award | PSUs | Class A |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) | 1,000,000 |  |  |  |  |  |
Liberty Global Performance Grant Award | PSUs | Class B |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) | 1,000,000 |  |  |  |  |  |
Liberty Global Challenge Performance Awards |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Award term |  | 7 years |  |  |  |  |
Liberty Global Challenge Performance Awards | Class A |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Number of ordinary share rights for each performance share (in shares) |  |  |  |  |  |  | 1
Liberty Global Challenge Performance Awards | June 24th, 2016 |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Vesting percentage |  | 100.00% |  |  |  |  |
Telenet | Options |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Awards outstanding (in shares) |  | 4,494,002 |  |  |  |  |
Awards outstanding (in EUR/USD per share) | (per share) |  | $ 48.67 |  |  |  | € 42.50 |
LiLAC Shares | CEO | Liberty Global Performance Grant Award | PSUs | Class A |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) |  |  |  | 41,589 | 33,333 |  |
LiLAC Shares | CEO | Liberty Global Performance Grant Award | PSUs | Class B |  |  |  |  |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |  |  |  |  |
Granted (in shares) |  |  |  | 41,589 | 33,333 |  |

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