Annual report pursuant to Section 13 and 15(d)

Mortgage Servicing Rights (Details)

v2.4.0.6
Mortgage Servicing Rights (Details) (USD $)
 12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Activity for Residential First Mortgage MSRs    
Balance, January 1 $ 14,900,000,000 $ 19,465,000,000
Additions 1,656,000,000 3,626,000,000
Sales (896,000,000) (110,000,000)
Impact Of Customer Payments (2,621,000,000) [1] (3,760,000,000) [1]
Impact Of Changes In Interest Rates And Other Market Factors (4,890,000,000) [2] (3,224,000,000) [2]
Model And Other Cash Flow Assumption Changes:    
Projected Cash Flows, Primarily Due to Increases in Cost to Service Loans (2,306,000,000) [3] (3,161,000,000) [3]
Impact of Changes in the Home Price Index 428,000,000 [3] 937,000,000 [3]
Impact of Changes in the Prepayment Model 1,818,000,000 [3] 1,298,000,000 [3]
Other Model Changes (711,000,000) [3] (171,000,000) [3]
Balance, December 31 7,378,000,000 14,900,000,000
Mortgage Loans Serviced For Investors (in billions) 1,379,000,000,000 1,628,000,000,000
Commercial and Residential Reverse Mortgage [Member]
    
Servicing Assets at Fair Value [Line Items]    
Servicing Asset at Amortized Cost $ 132,000,000 $ 277,000,000
[1] Represents the change in the market value of the MSR asset due to the impact of customer payments received during the period.
[2] These amounts reflect changes in the modeled MSR fair value largely due to observed changes in interest rates, volatility, spreads and the shape of the forward swap curve.
[3] These amounts reflect periodic adjustments to the valuation model as well as changes in certain cash flow assumptions such as costs to service and ancillary income per loan.