Registration of securities issued in business combination transactions

Subsequent Events (Details)

v2.4.0.8
Subsequent Events (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Mar. 31, 2013
Dec. 31, 2012
Liberty
   
Subsequent Event [Line Items]    
Subsequent event dividend to parent $ 50 $ 183
7.125% Senior Secured Notes due 2017
   
Subsequent Event [Line Items]    
Extinguishment of debt, subsequent event $ 376