Premises and Equipment - Components (Details) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Property, Plant and Equipment [Line Items]
Right-of-use assets	$ 8,901	$ 8,494
Total premises and equipment	36,244	32,223
Premises and equipment
Property, Plant and Equipment [Line Items]
Right-of-use assets	8,424	7,930
Other assets
Property, Plant and Equipment [Line Items]
Right-of-use assets	477	564
Land, buildings and leasehold improvements
Property, Plant and Equipment [Line Items]
Premises and equipment, excluding Right-of-use assets	19,041	16,874
Other premises and equipment
Property, Plant and Equipment [Line Items]
Premises and equipment, excluding Right-of-use assets	$ 8,779	$ 7,419