Quarterly report pursuant to Section 13 or 15(d)

Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)

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Fair Value Measurements - Nonrecurring Fair Value Inputs (Details)
$ in Millions
Mar. 31, 2022
USD ($)
Dec. 31, 2021
USD ($)
Mar. 31, 2021
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held for sale, measured at fair value $ 3,203 $ 4,455  
Loans and leases, measured at fair value 7,111 7,819  
Other assets, measured at fair value 12,807 12,144  
Nonrecurring | Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held for sale, measured at fair value 543   $ 66
Loans and leases, measured at fair value 68 213 85
Other assets, measured at fair value $ 50   $ 2,155
Nonrecurring | Level 3 | Market comparables      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measured at fair value   166  
Nonrecurring | Level 3 | Discounted cash flow      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measured at fair value   $ 1,875  
Price | Nonrecurring | Level 3 | Market comparables | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 85    
Price | Nonrecurring | Level 3 | Market comparables | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 98    
Price | Nonrecurring | Level 3 | Market comparables | Weighted Average      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 93    
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  
Discount rate | Nonrecurring | Level 3 | Discounted cash flow      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets, measurement input 0.07 0.07