Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

v3.21.2
Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)
$ in Millions
Jun. 30, 2021
USD ($)
Dec. 31, 2020
USD ($)
$ / security
Jun. 30, 2020
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measured at fair value $ 6,950 $ 6,681  
Other assets, measured at fair value 14,928 15,718  
Loans held for sale, measured at fair value 2,207 1,585  
Nonrecurring | Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measured at fair value 142 301 $ 186
Other assets, measured at fair value 2,172 576 6
Loans held for sale, measured at fair value 52 $ 792 $ 1,119
Nonrecurring | Level 3 | Market comparables      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measured at fair value 211    
Nonrecurring | Level 3 | Discounted cash flow      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measured at fair value $ 1,955    
Price | Nonrecurring | Level 3 | Discounted cash flow | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input   8  
Price | Nonrecurring | Level 3 | Discounted cash flow | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input   99  
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   95  
OREO discount | Nonrecurring | Level 3 | Market comparables | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.13 0.13  
OREO discount | Nonrecurring | Level 3 | Market comparables | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.59 0.59  
OREO discount | Nonrecurring | Level 3 | Market comparables | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.24 0.24  
Costs 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  
Costs 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  
Costs 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  
Revenue attrition | Nonrecurring | Level 3 | Discounted cash flow | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input   0.02  
Revenue attrition | Nonrecurring | Level 3 | Discounted cash flow | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input   0.19  
Revenue attrition | Nonrecurring | Level 3 | Discounted cash flow | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input   0.07  
Discount rate | Nonrecurring | Level 3 | Discounted cash flow      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.07    
Discount rate | Nonrecurring | Level 3 | Discounted cash flow | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input   0.11  
Discount rate | Nonrecurring | Level 3 | Discounted cash flow | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input   0.14  
Discount rate | Nonrecurring | Level 3 | Discounted cash flow | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input   0.12