Derivatives - Credit-related Contingent Features and Collateral (Details) $ in Millions	Sep. 30, 2022 USD ($)
Derivative [Line Items]
Additional collateral required to be posted upon downgrade, one incremental notch	$ 430
Additional collateral required to be posted upon downgrade, second incremental notch	1,043
Credit derivatives
Derivative [Line Items]
Derivative liability subject to unilateral termination upon downgrade, one incremental notch	10
Derivative liability subject to unilateral termination upon downgrade, second incremental notch	939
Collateral posted subject to unilateral termination upon downgrade, one incremental notch	0
Collateral posted subject to unilateral termination upon downgrade, second incremental notch	629
Bank of America, N.A.
Derivative [Line Items]
Additional collateral required to be posted upon downgrade, one incremental notch	199
Additional collateral required to be posted upon downgrade, second incremental notch	$ 789