Quarterly report pursuant to Section 13 or 15(d)

Fair Value Option - Gains (Losses) Relating to Assets and Liabilities (Details)

v3.19.1
Fair Value Option - Gains (Losses) Relating to Assets and Liabilities (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2019
Mar. 31, 2018
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option $ 1,648 $ 1,577
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 91 103
Trading inventory – other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 2,544 595
Consumer and commercial loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 19 85
Long-term debt    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option (1,103) 778
Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 97 16
Trading Account Income    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1,567 1,631
Trading Account 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 91 103
Trading Account 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 2,544 595
Trading Account Income | Consumer and commercial loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 1 106
Trading Account 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 (1,080) 819
Trading Account Income | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 11 8
Other Income    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 81 (54)
Other 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
Other 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
Other Income | Consumer and commercial loans    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option 18 (21)
Other 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 (23) (41)
Other Income | Other    
Fair Value, Option, Quantitative Disclosures [Line Items]    
Gains (losses) relating to assets and liabilities accounted for under the fair value option $ 86 $ 8