v2.4.0.6
Significant Accounting Policies (Details) (USD $)
In Billions, unless otherwise specified
6 Months Ended
Jun. 30, 2012
Jun. 30, 2011
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Significant non-cash activities, assets disposed of in connection with business dispositions $ 2.4  
Significant non-cash activities, liabilities disposed of in connection with business dispositions 1.0  
Adjustment to preferred stock conversion ratio   1.7
MUFG Stock Conversion [Member]
   
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION    
Value of stock converted   7.8
Carrying value of stock converted   $ 8.1