v2.3.0.11
Significant Accounting Policies (Details) (USD $)
In Billions
6 Months Ended 0 Months Ended 6 Months Ended
Jun. 30, 2011
Jun. 30, 2010
Apr. 21, 2011
MUFG Stock Conversion [Member]
Jun. 30, 2011
MUFG Stock Conversion [Member]
Financial instruments owned, corporate and other debt $ 5.6      
Financial instruments owned, physical commodities 3.4      
Financing obligations, other secured financings 9.0      
Value of stock converted     7.8 7.8
Stock Issued During Period Value Conversion Of Convertible Securities Carrying Value       8.1
Non-cash activities, negative adjustment 1.7     1.7
Non-cash activities, assets acquired   0.4    
Non-cash activities, liabilities assumed   0.1    
Non-cash activities, securities issued   $ 0.6