Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v2.4.0.6
Stock-Based Compensation (Narrative) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 3 Months Ended
Mar. 31, 2013
Mar. 31, 2012
Mar. 31, 2013
Common Class A [Member]
Dec. 31, 2012
Common Class A [Member]
Mar. 31, 2013
SIRIUS XM [Member]
Outstanding options     3,980,000 5,219,000 265,000,000
Options granted     0    
Total unrecognized compensation cost related to unvested Liberty equity awards $ 99       $ 310
Weighted average period of recognition related to unvested Liberty equity awards (in years) 1 year 10 months 25 days       3 years
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Number     1,528,000   90,000,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price     $ 90.69 $ 98.77 $ 1.95
Share-based Compensation Arrangement by Share-based Payment Award, Options, Exercisable, Weighted Average Exercise Price     $ 84.93   $ 2.57
Share-based Compensation $ 41 $ 6     $ 26