v3.21.1
Equity - Stock Repurchase Program (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Equity, Class of Treasury Stock    
Payment for shares repurchased $ 787 $ 643
Remaining share repurchase authorization amount $ 2,600  
December 2018 Stock Repurchase Authorization    
Equity, Class of Treasury Stock    
Shares repurchased (in shares) 5 6
Payment for shares repurchased $ 550 $ 500