Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

v2.4.0.6
Fair Value Measurements - Nonrecurring Fair Value Inputs (Details) (USD $)
In Millions, unless otherwise specified
9 Months Ended 9 Months Ended
Sep. 30, 2012
Dec. 31, 2011
Sep. 30, 2012
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2011
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2012
Discounted Cash Flow Market Comparables [Member]
Loans and Securities [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2012
Discounted Cash Flow Market Comparables [Member]
Loans and Securities [Member]
Minimum [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2012
Discounted Cash Flow Market Comparables [Member]
Loans and Securities [Member]
Maximum [Member]
Instruments Backed by Residential Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2012
Discounted Cash Flow [Member]
Loans and Securities [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2012
Discounted Cash Flow [Member]
Loans and Securities [Member]
Minimum [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Sep. 30, 2012
Discounted Cash Flow [Member]
Loans and Securities [Member]
Maximum [Member]
Instruments Backed by Commercial Real Estate Assets [Member]
Fair Value, Inputs, Level 3 [Member]
Fair Value, Measurements, Nonrecurring [Member]
Fair Value, Option, Quantitative Disclosures [Line Items]                    
Loans and Securities Fair Value Disclosure         $ 9,277     $ 305    
Loans Held-for-sale, Fair Value Disclosure 11,077 7,630 1,006 1,465 701     305    
Loans and leases     $ 8,576 [1] $ 10,368 [1] $ 8,576          
Fair Value Inputs, Yield           3.00% 6.00%   4.00% 13.00%
Fair Value Inputs, Prepayment Rate           2.00% 27.00%      
Fair Value Inputs, Probability of Default           0.00% 67.00%      
Fair Value Inputs, Loss Severity           6.00% 72.00%   22.00% 100.00%
Fair Value Inputs, Discount Rate           0.00% 29.00%      
Fair Value Inputs, Cost to Sell         8.00%          
[1] Losses represent charge-offs on real estate-secured loans.