Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Intangible Assets - Schedule of Goodwill (Details)

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Goodwill and Intangible Assets - Schedule of Goodwill (Details) - USD ($)
$ in Millions
Jun. 30, 2018
Dec. 31, 2017
Goodwill [Line Items]    
Total goodwill $ 68,951 $ 68,951
Operating Segments | Consumer Banking    
Goodwill [Line Items]    
Total goodwill 30,123 30,123
Operating Segments | Consumer Banking | Deposits    
Goodwill [Line Items]    
Total goodwill 18,414 18,414
Operating Segments | Consumer Banking | Consumer Lending    
Goodwill [Line Items]    
Total goodwill 11,709 11,709
Operating Segments | Global Wealth & Investment Management    
Goodwill [Line Items]    
Total goodwill 9,677 9,677
Operating Segments | Global Wealth & Investment Management | U.S. Trust    
Goodwill [Line Items]    
Total goodwill 2,917 2,917
Operating Segments | Global Wealth & Investment Management | Merrill Lynch Global Wealth Management    
Goodwill [Line Items]    
Total goodwill 6,760 6,760
Operating Segments | Global Banking    
Goodwill [Line Items]    
Total goodwill 23,923 23,923
Operating Segments | Global Banking | Global Commercial Banking    
Goodwill [Line Items]    
Total goodwill 16,146 16,146
Operating Segments | Global Banking | Global Corporate and Investment Banking    
Goodwill [Line Items]    
Total goodwill 6,231 6,231
Operating Segments | Global Banking | Business Banking    
Goodwill [Line Items]    
Total goodwill 1,546 1,546
Operating Segments | Global Markets    
Goodwill [Line Items]    
Total goodwill 5,182 5,182
All Other    
Goodwill [Line Items]    
Total goodwill $ 46 $ 46