Expenses - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 2	$ 203
Compensation and Employee Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring charges	15	182
Occupancy Costs
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 13	$ 21