Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Common Stock Repurchase Summary (Details)

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Shareholders' Equity - Common Stock Repurchase Summary (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Class of Stock [Line Items]      
Total purchase price of shares repurchased and retired $ 28,144 $ 20,094 $ 12,814
Common Stock      
Class of Stock [Line Items]      
Total number of shares repurchased and retired (in shares) 956 676 509
Total purchase price of shares repurchased and retired $ 28,144 $ 20,094 $ 12,814
Common Stock | CCAR capital plan repurchases      
Class of Stock [Line Items]      
Total purchase price of shares repurchased and retired 25,644 16,754 9,347
Common Stock | Other authorized repurchases      
Class of Stock [Line Items]      
Total purchase price of shares repurchased and retired $ 2,500 $ 3,340 $ 3,467