v3.3.1.900
Shareholders' Equity And Net Income Per Share Share Repurchase Program (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 12 Months Ended
Feb. 04, 2016
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Feb. 05, 2016
Share Repurchase Program [Line Items]          
Stock Repurchased During Period, Shares   14,581,705 15,041,713 9,106,434  
Stock Repurchased, Average Price   $ 79.48 $ 68.05 $ 50.14  
Stock Repurchased During Period, Value   $ 1,159 $ 1,024 $ 457  
Share Repurchase Program January 2015          
Share Repurchase Program [Line Items]          
Stock Repurchase Program, Authorized Amount   1,500      
Stock Repurchase Program, Remaining Authorized Repurchase Amount   507      
Share Repurchase Program January 2014          
Share Repurchase Program [Line Items]          
Stock Repurchase Program, Authorized Amount   $ 1,000      
Subsequent Event          
Share Repurchase Program [Line Items]          
Stock Repurchased During Period, Value $ 50        
Subsequent Event | Share Repurchase Program January 2015          
Share Repurchase Program [Line Items]          
Stock Repurchase Program, Remaining Authorized Repurchase Amount         $ 457