Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Outstanding Awards) (Details)

v2.4.0.8
Stock-Based Compensation (Outstanding Awards) (Details) (USD $)
In Millions, except Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share-based Compensation Arrangement by Share-based Payment Award, Fair Value Assumptions, Expected Dividend Rate 0.00%
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Weighted average remaining life, outstanding 4 years 8 months
Weighted average remaining life, exercisable 4 years 6 months
Outstanding, Aggregate intrinsic value $ 155
Aggregate intrinsic value $ 109
Common Class A
 
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]  
Outstanding options 3,656,000
Granted 1,000
Exercised (186,000)
Outstanding options 3,471,000
Exercisable options 2,352,000
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]  
Outstanding WAEP $ 91.74
Granted, WAEP $ 135.29
Exercised, WAEP $ 86.88
Outstanding WAEP $ 0
Exercisable WAEP $ 90.23