XML 33 R64.htm IDEA: XBRL DOCUMENT v3.19.3
Shareholders' equity Share Repurchases (Details) - USD ($)
$ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Oct. 30, 2019
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2019
Sep. 30, 2018
Dec. 01, 2018
Dec. 21, 2017
2019 Stock Repurchase Plan [Member]              
Equity, Class of Treasury Stock [Line Items]              
Stock Repurchase Program, Authorized Amount           $ 1,500  
Number of shares repurchased   3,079,618   8,417,838      
Cost of shares repurchased   $ 478   $ 1,221      
Repurchase authorization remaining at end of period   $ 258   $ 258      
2018 Stock Repurchase Plan [Member]              
Equity, Class of Treasury Stock [Line Items]              
Stock Repurchase Program, Authorized Amount             $ 1,000
Number of shares repurchased     2,781,307   5,225,162    
Cost of shares repurchased     $ 379   $ 703    
Repurchase authorization remaining at end of period     $ 297   $ 297    
Subsequent Event [Member] | 2019 Stock Repurchase Plan [Member]              
Equity, Class of Treasury Stock [Line Items]              
Number of shares repurchased 700,900            
Cost of shares repurchased $ 108            
Repurchase authorization remaining at end of period $ 150