Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value (Details)

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Fair Value Measurements - Nonrecurring Fair Value (Details) (USD $)
In Millions, unless otherwise specified
 3 Months Ended
Mar. 31, 2012
Dec. 31, 2011
Mar. 31, 2012
Fair Value, Measurements, Nonrecurring [Member]
Mar. 31, 2011
Fair Value, Measurements, Nonrecurring [Member]
Mar. 31, 2012
Level 2 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Mar. 31, 2011
Level 2 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Mar. 31, 2012
Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Mar. 31, 2011
Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis                
Loans held-for-sale $ 7,558 $ 7,630     $ 3,465 $ 587 $ 857 $ 5,043
Gains (Losses) on loans held-for-sale     68 38        
Loans and Leases         21 [1] 22 [1] 5,813 [1] 7,598 [1]
Gains (Losses) on loans and leases     (1,497) [1] (1,609) [1]        
Foreclosed properties            [2]    [2] 2,149 [2] 2,028 [2]
Gains (Losses) on Foreclosed Properties     (90) [2] (72) [2]        
Other assets 35,671 37,084           14 91
Gains (Losses) on other assets        $ (4)        
[1] Gains (losses) represent charge-offs on real estate-secured loans.
[2] Amounts are included in other assets on the Consolidated Balance Sheet and represent fair value and related losses on foreclosed properties that were written down subsequent to their initial classification as foreclosed properties.