v2.4.0.6
Financing Receivables (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
 6 Months Ended 12 Months Ended
Jun. 30, 2012
Y
Dec. 31, 2011
Loans held for sale $ 1,847 $ 114
Percent of loans which are current 99.00% 99.00%
Amount of commercial asset-backed and wholesale real estate loans internally graded doubtful 35 87
Loans outstanding to certain employees, repayment terms, minimum (in years) 1  
Loans outstanding to certain employees, repayment terms, maximum (in years) 12  
Loans outstanding to employees 6,089 5,610
Loans outstanding to employees, allowance 128 119
After-tax Leveraged Investment Arrangements
    
Loans outstanding to employees 167 162
Loans outstanding to employees, allowance 132 133
Commercial and Industrial
    
Amount of gross loans collectively evaluated for impairment 7,470 4,934
Amount of gross loans individually evaluated for impairment 52 163
Gross loans, impairment 31 33
Consumer Loans
    
Amount of gross loans collectively evaluated for impairment 6,201 5,072
Amount of gross loans individually evaluated for impairment 4 100
Residential Real Estate
    
Amount of gross loans collectively evaluated for impairment 5,493 4,675
Wholesale Real Estate
    
Amount of gross loans collectively evaluated for impairment 372 278
Amount of gross loans individually evaluated for impairment 32 50
Gross loans, impairment $ 32 $ 50