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 9 Months Ended
Sep. 30, 2014
Dec. 31, 2013
Sep. 30, 2014
Nonrecurring
Sep. 30, 2013
Nonrecurring
Sep. 30, 2014
Nonrecurring
Sep. 30, 2013
Nonrecurring
Sep. 30, 2014
Nonrecurring
Level 2
Sep. 30, 2013
Nonrecurring
Level 2
Sep. 30, 2014
Nonrecurring
Level 3
Sep. 30, 2013
Nonrecurring
Level 3
Assets and Liabilities Measured at Fair Value on a Nonrecurring Basis                    
Loans held-for-sale, measured at fair value $ 5,455 $ 6,656         $ 197 $ 4,266 $ 32 $ 274
Loans and leases, measured at fair value 8,183 10,042         9 23 4,298 5,114
Foreclosed properties, measured at fair value                [1] 17 [1] 1,145 [1] 1,293 [1]
Other assets, measured at fair value 12,726 18,055         24 78    10
Gains (Losses) on loans held-for-sale     (17) 1 (6) (66)        
Gains (Losses) on loans and leases     (286) (281) (671) (985)        
Gains (Losses) on Foreclosed Properties     (21) [1] (31) [1] (34) [1] (37) [1]        
Gains (Losses) on other assets     $ (1) $ (7) $ (2) $ (15)        
[1] Amounts are included in other assets on the Consolidated Balance Sheet and represent fair value of, and related losses on, foreclosed properties that were written down subsequent to their initial classification as foreclosed properties.