Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

v3.19.3
Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)
$ in Millions
Sep. 30, 2019
USD ($)
$ / security
Dec. 31, 2018
USD ($)
Sep. 30, 2018
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measured at fair value $ 5,011 $ 2,942  
Loans and leases, measured at fair value 7,674 4,349  
Other assets, measured at fair value 22,952 19,739  
Nonrecurring | Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measured at fair value 111   $ 12
Loans and leases, measured at fair value 232 $ 474 492
Other assets, measured at fair value $ 658   $ 3
Measurement Input, Price | Nonrecurring | Level 3 | Discounted cash flow | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 77    
Measurement Input, Price | Nonrecurring | Level 3 | Discounted cash flow | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 100    
Measurement Input, Price | Nonrecurring | Level 3 | Discounted cash flow | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input | $ / security 86    
Measurement Input, Discount Rate | Nonrecurring | Level 3 | Market Comparables | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.13 0.13  
Measurement Input, Discount Rate | Nonrecurring | Level 3 | Market Comparables | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.59 0.59  
Measurement Input, Discount Rate | Nonrecurring | Level 3 | Market Comparables | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.24 0.25  
Measurement Input, Cost to Sell | Nonrecurring | Level 3 | Market Comparables | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.08 0.08  
Measurement Input, Cost to Sell | Nonrecurring | Level 3 | Market Comparables | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.26 0.26  
Measurement Input, Cost to Sell | Nonrecurring | Level 3 | Market Comparables | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.09 0.09  
Merchant Servicing Joint Venture | Nonrecurring | Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measured at fair value $ 652    
Merchant Servicing Joint Venture | Measurement Input, Customer Attrition | Nonrecurring | Level 3 | Discounted cash flow | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.00    
Merchant Servicing Joint Venture | Measurement Input, Customer Attrition | Nonrecurring | Level 3 | Discounted cash flow | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.19    
Merchant Servicing Joint Venture | Measurement Input, Customer Attrition | Nonrecurring | Level 3 | Discounted cash flow | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.05    
Merchant Servicing Joint Venture | Measurement Input, Cost To Service | Nonrecurring | Level 3 | Discounted cash flow | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.11    
Merchant Servicing Joint Venture | Measurement Input, Cost To Service | Nonrecurring | Level 3 | Discounted cash flow | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.19    
Merchant Servicing Joint Venture | Measurement Input, Cost To Service | Nonrecurring | Level 3 | Discounted cash flow | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.15