Quarterly report pursuant to Section 13 or 15(d)

Earnings per Share (Details Textual)

v2.4.0.6
Earnings per Share (Details Textual)
3 Months Ended 1 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Series B Preferred Stock [Member]
Jan. 31, 2013
Liberty Media [Member]
Series B Preferred Stock [Member]
Sep. 30, 2012
Liberty Media [Member]
Series B Preferred Stock [Member]
Jan. 31, 2013
Liberty Media [Member]
Common Stock [Member]
Sep. 30, 2012
Liberty Media [Member]
Common Stock [Member]
Earnings Per Share [Abstract]              
Anti-dilutive common stock equivalents (in shares) 349,681,000 443,764,000          
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]              
Conversion of preferred stock to common stock (in shares)     6,250,100 6,250,100 6,249,900 1,293,509,076 1,293,467,684