Parent Company Financial Statements - Statement of Condition (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Assets:
Interest-bearing deposits with banks	$ 112,957	$ 87,665
Trading account assets	768	773
Other assets	64,514	44,806
Total assets	353,240	297,258
Liabilities:
Consolidated banking subsidiary	0	68
Consolidated non-banking subsidiaries and unconsolidated entities	2,063	896
Total liabilities	327,914	273,459
Shareholders’ equity	25,326	23,799	$ 25,191	$ 27,363
Total liabilities and shareholders’ equity	353,240	297,258
Parent Company
Assets:
Interest-bearing deposits with banks	438	659
Trading account assets	499	454
Investment securities available-for-sale	378	279
Consolidated banking subsidiary	27,504	25,391
Consolidated non-banking subsidiaries	10,487	10,055
Unconsolidated entities	114	111
Consolidated banking subsidiary	170	2
Consolidated non-banking subsidiaries and unconsolidated entities	9,211	6,816
Other assets	127	230
Total assets	48,928	43,997
Liabilities:
Accrued expenses and other liabilities	652	615
Long-term debt	20,887	18,619
Total liabilities	23,602	20,198
Shareholders’ equity	25,326	23,799
Total liabilities and shareholders’ equity	$ 48,928	$ 43,997