Quarterly report pursuant to Section 13 or 15(d)

Loans, Notes and Mortgages - Credit Quality Indicators (Details)

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Loans, Notes and Mortgages - Credit Quality Indicators (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2012
Dec. 31, 2011
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable   $ 20,646
Commercial Portfolio Segment [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 6,934 7,721
Commercial Portfolio Segment [Member] | Commercial real estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 598 775
Commercial Portfolio Segment [Member] | Pass rated Member] | Commercial real estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 444 511
Commercial Portfolio Segment [Member] | Reservable Criticized [Member] | Commercial real estate [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 154 264
United States [Member] | Commercial Portfolio Segment [Member] | Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 3,365 3,841
United States [Member] | Commercial Portfolio Segment [Member] | Pass rated Member] | Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 3,162 3,594
United States [Member] | Commercial Portfolio Segment [Member] | Reservable Criticized [Member] | Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 203 247
Non-U.S. [Member] | Commercial Portfolio Segment [Member] | Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 2,971 3,105
Non-U.S. [Member] | Commercial Portfolio Segment [Member] | Pass rated Member] | Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable 2,833 2,967
Non-U.S. [Member] | Commercial Portfolio Segment [Member] | Reservable Criticized [Member] | Commercial [Member]
   
Financing Receivable, Recorded Investment [Line Items]    
Loans receivable $ 138 $ 138