Commitments, Guarantees and Contingencies - Narrative (Details) € in Millions, $ in Millions	1 Months Ended	3 Months Ended		12 Months Ended
	Feb. 29, 2016 operator	Dec. 31, 2025 EUR (€)	Dec. 31, 2025 USD ($)	Dec. 31, 2025 EUR (€) complaint	Dec. 31, 2025 USD ($)	Oct. 29, 2014 USD ($) certificate	May 17, 2013 USD ($)
Loss Contingencies
Dividend rate of preferred stock per annum (as a percent)				10.00%
United States District Court for the Southern District of New York (“SDNY”) styled In Re: Interest Rate Swaps Antitrust Litigation \| Pending Litigation
Loss Contingencies
Number of swap execution facilities \| operator	3
City of Philadelphia, et al. v. Bank of America Corporation, et al. \| Pending Litigation
Loss Contingencies
Number of antitrust class action complaints \| complaint				3
Case Number 15/3637 and Case Number 15/4353 \| Pending Litigation
Loss Contingencies
Withholding tax credit set-off		€ 124		€ 124	$ 146
Dutch Authority
Loss Contingencies
Loss Contingency, Damages Paid, Value		€ 101	$ 117
IKB International S.A. in Liquidation, et al. v. Morgan Stanley, et al. \| Pending Litigation
Loss Contingencies
Value of mortgage pass-through certificates \| $						$ 116	$ 133
Number of certificates dismissed \| certificate						4