XML 79 R80.htm IDEA: XBRL DOCUMENT v2.4.0.8
Stock Options and Other Stock Based Compensation (Details 2) (Stock Options, USD $)
In Millions, except Share data in Thousands, unless otherwise specified
 12 Months Ended
Dec. 31, 2013
Dec. 31, 2012
Dec. 31, 2011
Stock Options
      
Number of Shares      
Options outstanding, Beginning balance (in shares) 3,735    
Granted (in shares) 354    
Exercised (in shares) (1,414)    
Forfeited or expired (in shares) (254)    
Options outstanding, ending balance (in shares) 2,421 3,735  
Options vested or expected to vest (in shares) 2,354    
Options exercisable (in shares) 1,538    
Weighted Average Exercise Price (per share)      
Options outstanding, Beginning balance (in dollars per share) $ 22.65    
Granted (in dollars per share) $ 26.10    
Exercised (in dollars per share) $ 17.52    
Forfeited or expired (in dollars per share) $ 28.90    
Options outstanding, Closing balance (in dollars per share) $ 25.50 $ 22.65  
Options vested or expected to vest (in dollars per share) $ 25.48    
Options exercisable (in dollars per share) $ 25.04    
Weighted Average Remaining Contractual Term (in years)      
Options outstanding, Closing balance 3 years 4 months 24 days    
Options vested or expected to vest 3 years 4 months 24 days    
Options exercisable 2 years 4 months 24 days    
Aggregate Intrinsic Value      
Options outstanding, Closing balance (in dollars) $ 30    
Options vested or expected to vest (in dollars) 29    
Options exercisable (in dollars) 21    
Weighted average grant-date fair value of options granted (in dollars per share) $ 12.39 $ 10.63 $ 13.70
Aggregate intrinsic value of options exercised (in dollars) 16 3 4
Aggregate cash received from options exercised (in dollars) $ 24 $ 4 $ 5
Weighted average assumptions used to estimate the fair value of each option grant      
Expected life of options (years) 5 years 4 years 9 months 4 years 9 months
Expected stock price volatility (as a percent) 55.30% 56.60% 53.20%
Risk-free interest rate (as a percent) 0.90% 0.80% 1.70%
Expected dividend yield (as a percent) 0.00% 0.00% 0.00%