Fair Value Measurement - Level 3 Analysis (Details) - Recurring - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Level 3 Analysis - Supplemental Data [Abstract]
Assets fair value	$ 1,130,863	$ 1,105,603
Non-trading loans
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	1,700
Non-trading loans | First Republic
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	1,100
Derivative receivables
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	(1,800)
Mortgage servicing rights
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	549
Level 3
Level 3 Analysis - Supplemental Data [Abstract]
Assets fair value	23,656	$ 23,626
Increase (decrease) in level 3 assets	$ 30