Quarterly report pursuant to Section 13 or 15(d)

Investments In Affiliates Accounted For Using The Equity Method (Schedule Of Liberty's Share Of Earnings (Losses) Of Affiliates) (Details)

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Investments In Affiliates Accounted For Using The Equity Method (Schedule Of Liberty's Share Of Earnings (Losses) Of Affiliates) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Equity Method Investments and Operating Activities Segment [Line Items]        
Share of earnings (losses) of affiliates, net $ (6) $ (8) $ (53) $ (12)
Charter Communications
       
Equity Method Investments and Operating Activities Segment [Line Items]        
Share of earnings (losses) of affiliates, net (34) (37) (87) (74)
SIRIUS XM
       
Equity Method Investments and Operating Activities Segment [Line Items]        
Share of earnings (losses) of affiliates, net       8
Live Nation
       
Equity Method Investments and Operating Activities Segment [Line Items]        
Share of earnings (losses) of affiliates, net 21 13 18 5
Sirius XM Canada
       
Equity Method Investments and Operating Activities Segment [Line Items]        
Share of earnings (losses) of affiliates, net 2 2 3 3
Equity method investment, other
       
Equity Method Investments and Operating Activities Segment [Line Items]        
Share of earnings (losses) of affiliates, net $ 5 $ 14 $ 13 $ 46