v3.20.1
Equity - Stock Repurchase Program (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Equity, Class of Treasury Stock    
Payment for shares repurchased $ 643 $ 419
Remaining share repurchase authorization amount $ 3,500  
December 2018 Stock Repurchase Authorization    
Equity, Class of Treasury Stock    
Shares repurchased (in shares) 6 4
Payment for shares repurchased $ 500 $ 300