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Commitments and Contingencies - Narrative (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Dec. 31, 2023
Loss Contingencies [Line Items]          
Reserve for unfunded commitments $ 53,100,000   $ 53,100,000   $ 57,200,000
Minimum          
Loss Contingencies [Line Items]          
Total letters of credit and unfunded lending commitments 0   0    
Maximum          
Loss Contingencies [Line Items]          
Total letters of credit and unfunded lending commitments 10,000,000   10,000,000    
Total letters of credit and unfunded lending commitments          
Loss Contingencies [Line Items]          
Guarantor obligations, monetary amount 29,160,000,000 $ 29,390,000,000 57,060,000,000.00 $ 59,500,000,000  
Total letters of credit and unfunded lending commitments $ 15,448,484,000   $ 15,448,484,000   $ 16,253,624,000