Fair Value Measurement - Level 3 Analysis (Details) - Recurring - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Level 3 Analysis - Supplemental Data [Abstract]
Assets fair value	$ 1,479,913	$ 1,130,863
MSRs
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	599
Other assets
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	586
Derivative receivables
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	(472)
Non-trading loans
Level 3 Analysis - Supplemental Data [Abstract]
Increase (decrease) in level 3 assets	(663)
Level 3
Level 3 Analysis - Supplemental Data [Abstract]
Assets fair value	23,783	$ 23,656
Increase (decrease) in level 3 assets	$ 127