Quarterly report pursuant to Section 13 or 15(d)

Fair Value Option - Changes in Fair Value of Assets and Liabilities (Details)

v3.7.0.1
Fair Value Option - Changes in Fair Value of Assets and Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option $ 1,196 $ 276
Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (12) 8
Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 150 112
Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,151 (113)
Loans and leases    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 24 29
Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 85 165
Other assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option   2
Long-term deposits    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 6 (31)
Federal funds purchased and securities loaned or sold under agreements to repurchase    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (45) (8)
Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (2)  
Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 38 148
Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (199) (36)
Trading Account Profits (Losses)    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,087 3
Trading Account Profits (Losses) | Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (12) 8
Trading Account Profits (Losses) | Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 150 112
Trading Account Profits (Losses) | Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,151 (113)
Trading Account Profits (Losses) | Loans and leases    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 5 19
Trading Account Profits (Losses) | Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1 0
Trading Account Profits (Losses) | Other assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option   0
Trading Account Profits (Losses) | Long-term deposits    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1 (9)
Trading Account Profits (Losses) | Federal funds purchased and securities loaned or sold under agreements to repurchase    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (45) (8)
Trading Account Profits (Losses) | Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (2)  
Trading Account Profits (Losses) | Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Trading Account Profits (Losses) | Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (162) (6)
Mortgage Banking Income    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 40 130
Mortgage Banking Income | Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Loans and leases    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 40 130
Mortgage Banking Income | Other assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option   0
Mortgage Banking Income | Long-term deposits    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Federal funds purchased and securities loaned or sold under agreements to repurchase    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0  
Mortgage Banking Income | Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Mortgage Banking Income | Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Other Income (Loss)    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 69 143
Other Income (Loss) | Federal funds sold and securities borrowed or purchased under agreements to resell    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Other Income (Loss) | Loans reported as trading account assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Other Income (Loss) | Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Other Income (Loss) | Loans and leases    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 19 10
Other Income (Loss) | Loans held-for-sale    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 44 35
Other Income (Loss) | Other assets    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option   2
Other Income (Loss) | Long-term deposits    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 5 (22)
Other Income (Loss) | Federal funds purchased and securities loaned or sold under agreements to repurchase    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0 0
Other Income (Loss) | Short-term borrowings    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 0  
Other Income (Loss) | Unfunded loan commitments    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 38 148
Other Income (Loss) | Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option $ (37) $ (30)