v3.3.1.900
Acquisitions (Pending 2015 Acquisition and 2014 Acquisition) (Schedules) (Details) (Details)
€ in Millions, $ in Millions
Nov. 19, 2014
EUR (€)
Nov. 19, 2014
USD ($)
Nov. 11, 2014
USD ($)
Dec. 31, 2014
USD ($)
Dec. 31, 2013
USD ($)
Dec. 31, 2012
USD ($)
Business Acquisition [Line Items]            
Goodwill       $ 29,001.6 $ 23,748.8 $ 13,877.6
Ziggo Acquisition [Member]            
Business Acquisition [Line Items]            
Business acquisition, cash consideration     $ 1,872.9      
Fair value of the pre-existing investment in Ziggo     2,015.4      
Cost of acquired entity     8,794.1      
Cash and cash equivalents     1,889.7      
Other current assets     69.6      
Property and equipment, net     2,714.9      
Goodwill     7,724.3      
Intangible assets subject to amortization     5,000.9      
Other assets, net     394.6      
Current portion of long-term debt and capital lease obligations     (604.0)      
Other accrued and current liabilities     (443.5)      
Long-term debt and capital lease obligations     (5,351.5)      
Other long-term liabilities     (1,520.3)      
Noncontrolling interest     (1,080.6)      
Total purchase price     8,794.1      
Ziggo Acquisition [Member] | Class A ordinary shares, $0.01 nominal value. Issued and outstanding 251,167,686 and 222,081,117 shares, respectively            
Business Acquisition [Line Items]            
Liberty Global Class A & C ordinary shares     1,448.7      
Ziggo Acquisition [Member] | Class C Ordinary Shares [Member]            
Business Acquisition [Line Items]            
Liberty Global Class A & C ordinary shares     $ 3,457.1      
Ziggo NCI Acquisition [Member]            
Business Acquisition [Line Items]            
Business acquisition, cash consideration € 209.0 $ 260.7        
Cost of acquired entity   950.7        
Reduction of noncontrolling interests   927.2        
Additional paid-in capital   $ 23.5