Premises and Equipment - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Property Plant And Equipment Capitalized Interest Costs [Abstract]
Operating lease liabilities	$ 717	$ 709
Operating Lease Liability Statement Of Financial Position Extensible List	Accrued interest and other liabilities	Accrued interest and other liabilities
Period of noncancelable operating lease in years	18 years