Premises, Equipment and Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment and Lease Commitments [Abstract]
Depreciation and amortization expense	$ 939	$ 790	$ 775
Finance lease, right-of-use asset	15	22
Finance lease, liability	$ 27	$ 33
Finance leases, a weighted-average remaining lease term	4 years 1 month 6 days	3 years 3 months 18 days
Finance lease expense	$ 16	$ 14
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Operating Lease, Liability, Statement of Financial Position [Extensible List]	Other liabilities	Other liabilities
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Premises and equipment, net	Premises and equipment, net
Finance Lease, Liability, Statement of Financial Position [Extensible Enumeration]	Other borrowings	Other borrowings