Share-based Compensation (Summary of Stock-Based Compensation Not Yet Recognized) (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014
Liberty Global [Member] | Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense not yet recognized	$ 110.5
Weighted average period remaining for expense recognition (in years)	2 years 2 months 12 days
Liberty Global [Member] | Performance Shares [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense not yet recognized	141.3
Weighted average period remaining for expense recognition (in years)	2 years
Telenet [Member] | Stock Compensation Plan [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Total compensation expense not yet recognized	$ 8.7
Weighted average period remaining for expense recognition (in years)	2 years 6 months