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
3 Months Ended
Mar. 31, 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 5 years
Weighted average remaining life, exercisable 4 years 8 months 12 days
Outstanding, Aggregate intrinsic value $ 137
Aggregate intrinsic value $ 85
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 (155,000)
Outstanding options 3,502,000
Exercisable options 2,035,000
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 $ 93.11
Outstanding WAEP $ 0
Exercisable WAEP $ 88.92