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Stock Plans - Narrative (Details) - USD ($)
$ / shares in Units, shares in Millions
3 Months Ended 9 Months Ended 120 Months Ended
Sep. 30, 2023
Sep. 30, 2022
Sep. 30, 2023
Sep. 30, 2022
Dec. 31, 2022
Jan. 01, 2023
Dec. 02, 2020
Class of Stock [Line Items]              
Common shares repurchased $ 57,000,000 $ 338,000,000 $ 662,000,000 $ 1,843,000,000      
Common Stock              
Class of Stock [Line Items]              
Common shares repurchased     $ 659,000,000        
Number of shares repurchased (in shares)     9.6        
Average cost of shares repurchased (in dollars per share)     $ 68.55        
Remaining share repurchase capacity $ 5,300,000,000   $ 5,300,000,000        
Common Stock | Share Repurchase Program Amended December 2, 2020              
Class of Stock [Line Items]              
Stock repurchase value             $ 23,700,000,000
Common Stock | Prior to January 1, 2023              
Class of Stock [Line Items]              
Common shares repurchased         $ 22,000,000,000    
Common Stock | Share Repurchase Program Amended January 1, 2023              
Class of Stock [Line Items]              
Stock repurchase value           $ 6,000,000,000