Annual report pursuant to Section 13 and 15(d)

Merger and Restructuring Activity (Details)

v2.4.0.6
Merger and Restructuring Activity (Details) (USD $)
In Millions, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Restructuring Cost and Reserve [Line Items]      
Severance and employee-related charges $ 226 $ 455 $ 1,351
Systems integrations and related charges 285 1,137 1,155
Other merger and restructuring charges 127 228 215
Total merger and restructuring charges 638 1,820 2,721
Restructuring Reserve, Beginning Balance 336 403  
Cash payments and other (319) (496)  
Restructuring Reserve, Ending Balance 234 336 403
Merrill Lynch [Member]
     
Restructuring Cost and Reserve [Line Items]      
Total merger and restructuring charges   1,600 1,800
Exit costs and restructuring charges 217 375  
Series Of Individually Immaterial Business Acquisitions From Prior Periods [Member]
     
Restructuring Cost and Reserve [Line Items]      
Total merger and restructuring charges   202 940
Exit costs and restructuring charges   $ 54