Annual report pursuant to Section 13 and 15(d)

Shareholders' Equity - Common Stock Repurchase Summary (Details)

v3.8.0.1
Shareholders' Equity - Common Stock Repurchase Summary (Details) - USD ($)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2017
Dec. 31, 2016
Dec. 31, 2015
Class of Stock [Line Items]      
Total purchase price of shares repurchased and retired $ 12,814 $ 5,112 $ 2,374
Common Stock      
Class of Stock [Line Items]      
Total purchase price of shares repurchased and retired $ 12,814 $ 5,112 $ 2,374
Common Stock | CCAR capital plan repurchases      
Class of Stock [Line Items]      
Total number of shares repurchased and retired (in shares) 509 333 140
Total purchase price of shares repurchased and retired $ 9,347 $ 4,312 $ 2,374
Common Stock | Other authorized repurchases      
Class of Stock [Line Items]      
Total purchase price of shares repurchased and retired $ 3,467 $ 800 $ 0