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Goodwill and Other Intangible Assets - by Business Segment (Details 1) (USD $)
In Millions
Sep. 30, 2011
Jun. 30, 2011
Dec. 31, 2010
Sep. 30, 2010
Jun. 30, 2010
Dec. 31, 2009
Goodwill [Line Items]      
Total goodwill$ 48,180$ 48,882$ 48,854$ 48,736$ 48,320$ 48,357
Investment Bank
      
Goodwill [Line Items]      
Total goodwill5,283 5,278   
Retail Financial Services
      
Goodwill [Line Items]      
Total goodwill16,489 16,496   
Card Services
      
Goodwill [Line Items]      
Total goodwill14,514 14,522   
Commercial Banking
      
Goodwill [Line Items]      
Total goodwill2,864 2,866   
Treasury & Securities Services
      
Goodwill [Line Items]      
Total goodwill1,667 1,680   
Asset Management [Member]
      
Goodwill [Line Items]      
Total goodwill6,986 7,635   
Corporate/Private Equity
      
Goodwill [Line Items]      
Total goodwill$ 377 $ 377