Business Combinations - Narrative (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended		14 Months Ended
	May 01, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024
Business Acquisition [Line Items]
Estimated bargain purchase gain associated with the First Republic acquisition			$ 2,712		$ 2,712
Increase to estimated bargain purchase gain		$ 119		$ 103
Provision for credit losses		3,052	$ 2,899	4,936	$ 5,174
First Republic
Business Acquisition [Line Items]
Estimated bargain purchase gain associated with the First Republic acquisition	$ 2,700					$ 2,878
Increase to estimated bargain purchase gain		$ 119		$ 103
Provision for credit losses	$ 1,200