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
Mar. 31, 2013
Mar. 31, 2012
Share of earnings (losses) of affiliates, net $ 17 $ 12
SIRIUS XM [Member]
   
Share of earnings (losses) of affiliates, net 8 [1] 33
Live Nation [Member]
   
Share of earnings (losses) of affiliates, net (19) (16)
Sirius XM Canada [Member]
   
Share of earnings (losses) of affiliates, net 1 [1] 0
Equity method investment, other [Member]
   
Share of earnings (losses) of affiliates, net $ 27 $ (5)
[1] During the three months ended March 31, 2013, as discussed in note 1, Liberty acquired an additional 50 million common shares and acquired a controlling interest in SIRIUS XM and as a result consolidates SIRIUS XM as of such date. SIRIUS XM has an investment in SIRIUS XM Canada that was recorded at fair value in purchase accounting. See discussion below of SIRIUS XM Canada.