v2.4.0.6
Segment and Geographic Information (Net Revenues and Assets by Geographic Area) (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Net Revenues $ 6,966 $ 5,280 $ 6,942 $ 6,924 $ 5,675 $ 9,803 $ 9,200 $ 7,558 $ 26,112 $ 32,236 $ 31,230
Total assets 780,960 [1]       749,898 [1]       780,960 [1] 749,898 [1]  
Americas
                      
Net Revenues                 20,200 22,306 21,452
Total assets 587,993       558,765       587,993 558,765  
Europe, Middle East and Africa
                      
Net Revenues                 3,078 6,619 5,458
Total assets 122,152       134,190       122,152 134,190  
Asia
                      
Net Revenues                 2,834 3,311 4,320
Total assets $ 70,815       $ 56,943       $ 70,815 $ 56,943  
[1] Corporate assets have been fully allocated to the Company’s business segments.