v2.4.0.8
Equity (Changes in Common Stock) (Details)
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Repurchases and retirements of common stock 49,000,000 96,000,000 95,000,000
Class A Common Stock [Member]
      
Common Stock, Shares, Outstanding, Beginning Balance 2,122,278,635 2,095,000,000 2,072,000,000
Stock compensation plans 14,000,000 24,000,000 20,000,000
Repurchases and retirements of common stock 0 0 0
Employee stock purchase plan 2,000,000 3,000,000 3,000,000
Common Stock, Shares, Outstanding, Ending Balance 2,138,075,133 2,122,278,635 2,095,000,000
ClassA Special Common Stock [Member]
      
Common Stock, Shares, Outstanding, Beginning Balance 507,769,463 601,000,000 695,000,000
Stock compensation plans 0 3,000,000 1,000,000
Repurchases and retirements of common stock (49,000,000) (96,000,000) (95,000,000)
Employee stock purchase plan 0 0 0
Common Stock, Shares, Outstanding, Ending Balance 459,030,180 507,769,463 601,000,000
Class B Common Stock [Member]
      
Common Stock, Shares, Outstanding, Beginning Balance 9,444,375 9,000,000 9,000,000
Stock compensation plans 0 0 0
Repurchases and retirements of common stock 0 0 0
Employee stock purchase plan 0 0 0
Common Stock, Shares, Outstanding, Ending Balance 9,444,375 9,444,375 9,000,000