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, 2024
USD ($)
Dec. 31, 2023
USD ($)
Mar. 31, 2023
USD ($)
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held for sale, measured at fair value $ 2,070 $ 2,059  
Loans and leases, measured at fair value 2,938 3,569  
Other assets 13,935 11,861  
Nonrecurring | Level 3      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held for sale, measured at fair value 2,687   $ 3,428
Loans and leases, measured at fair value 45   57
Other assets 10   $ 30
Nonrecurring | Level 3 | Pricing model      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held for sale, measured at fair value 2,687 2,793  
Nonrecurring | Level 3 | Market comparables      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measured at fair value $ 45 153  
Nonrecurring | Level 3 | Discounted cash flow      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Other assets   $ 898  
Implied yield | Nonrecurring | Level 3 | Pricing model | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 0.07 0.07  
Implied yield | Nonrecurring | Level 3 | Pricing model | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans held-for-sale, measurement input 0.23 0.23  
OREO discount | Nonrecurring | Level 3 | Market comparables | Minimum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.10 0.10  
OREO discount | Nonrecurring | Level 3 | Market comparables | Maximum      
Fair Value Measurement Inputs and Valuation Techniques [Line Items]      
Loans and leases, measurement input 0.66 0.66  
OREO discount | Nonrecurring | Level 3 | Market comparables | Weighted Average      
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 | 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 0.24 0.24  
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