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Goodwill and Intangible Assets - Goodwill (Details) - USD ($)
Sep. 30, 2015
Dec. 31, 2014
Goodwill [Line Items]    
Total goodwill $ 69,761,000,000 $ 69,777,000,000
Operating Segments | Consumer Banking    
Goodwill [Line Items]    
Total goodwill 30,123,000,000 30,123,000,000
Operating Segments | Global Wealth & Investment Management    
Goodwill [Line Items]    
Total goodwill 9,698,000,000 9,698,000,000
Operating Segments | Global Banking    
Goodwill [Line Items]    
Total goodwill 23,923,000,000 23,923,000,000
Operating Segments | Global Markets    
Goodwill [Line Items]    
Total goodwill 5,197,000,000 5,197,000,000
Operating Segments | Legacy Assets & Servicing    
Goodwill [Line Items]    
Total goodwill 0 0
All Other    
Goodwill [Line Items]    
Total goodwill $ 820,000,000 $ 836,000,000