v2.4.0.8
Fair Value, Assets Recorded at Fair Value on Nonrecurring Basis (Details) (USD $)
In Millions, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages held for sale $ 35,402 $ 42,305
Loans held for sale 2 6
Loans 6,088 6,206
MSRs (carried at fair value) 14,185 11,538
Other assets 595 0
Nonrecurring [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages held for sale 2,540 2,554
Loans held for sale 0 4
Loans 3,326 7,400
Other assets 487 1,133
Nonrecurring [Member] | Commercial Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 388 1,507
Nonrecurring [Member] | Consumer Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 2,938 5,893
Level 1 [Member] | Nonrecurring [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages held for sale 0 0
Loans held for sale 0 0
Loans 0 0
Other assets 0 0
Level 1 [Member] | Nonrecurring [Member] | Commercial Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 0 0
Level 1 [Member] | Nonrecurring [Member] | Consumer Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 0 0
Level 2 [Member] | Nonrecurring [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages held for sale 1,552 1,509
Loans held for sale 0 4
Loans 3,316 7,396
Other assets 382 989
Level 2 [Member] | Nonrecurring [Member] | Commercial Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 384 1,507
Level 2 [Member] | Nonrecurring [Member] | Consumer Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 2,932 5,889
Level 3 [Member] | Nonrecurring [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Mortgages held for sale 988 1,045
Loans held for sale 0 0
Loans 10 4
Other assets 105 144
Level 3 [Member] | Nonrecurring [Member] | Commercial Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans 4 0
Level 3 [Member] | Nonrecurring [Member] | Consumer Portfolio Segment [Member]
   
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Loans $ 6 $ 4