Quarterly report pursuant to Section 13 or 15(d)

Tracking Stock (Details)

v2.4.0.8
Tracking Stock (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Jun. 30, 2013
Dec. 31, 2012
Targeted or Tracking Stock, Stock [Line Items]        
Number of tracking stocks 2      
Cash and cash equivalents $ 1,833 $ 1,256 $ 1,448 $ 2,660
Ventures Group
       
Targeted or Tracking Stock, Stock [Line Items]        
Cash and cash equivalents 1,141 658 857 1,961
Interactive Group
       
Targeted or Tracking Stock, Stock [Line Items]        
Cash and cash equivalents $ 692 $ 598 $ 591 $ 699