Commitments and Contingencies - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Loss Contingencies [Line Items]
Reserve for unfunded commitments	$ 49,600,000		$ 49,600,000		$ 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	28,770,000,000	$ 27,780,000,000	85,830,000,000	$ 87,280,000,000
Total letters of credit and unfunded lending commitments	$ 15,293,802,000		$ 15,293,802,000		$ 16,253,624,000