XML 90 R76.htm IDEA: XBRL DOCUMENT v3.8.0.1
Stock-Based Compensation - Stock Options (Details) - Stock Options - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended
Mar. 31, 2018
Mar. 31, 2017
Stock Option Program    
Balance at the beginning of the period 34,965  
Granted - Annual 3,174  
Exercised (1,844)  
Forfeited (22)  
Balance at the end of the period 36,273  
Options exercisable 27,757  
Options exercisable, exercise price $ 120.20  
Weighted average exercise price - Beginning balance 125.73  
Weighted average exercise price - Granted - Annual 233.62  
Weighted average exercise price - Exercised 90.20  
Weighted average exercise price - Canceled 180.69  
Weighted average exercise price - Ending balance $ 136.94  
Weighted average remaining contractual life for options outstanding 73 months  
Weighted average remaining contractual life for options exercisable 63 months  
Aggregate intrinsic value for options outstanding $ 3,040  
Aggregate intrinsic value for options exercisable $ 2,757  
Expiration of annual grants 10 years  
Compensation expense yet to be recognized $ 123  
Expense recognition period 25 months  
Total intrinsic value of stock options exercised $ 283 $ 286
Cash received from options exercised 166 271
Tax benefit realized from exercise of stock options $ 61 $ 106
Share- based compensation assumptions    
Weighted average exercise price $ 233.63  
Risk-free interest rate (as a percent) 2.70%  
Dividend yield (as a percent) 2.40%  
Expected volatility (as a percent) 21.00%  
Expected life 78 months  
Black-Scholes fair value $ 41.59  
Maximum    
Stock Option Program    
Vesting period 3 years  
Minimum    
Stock Option Program    
Vesting period 1 year