Annual report pursuant to Section 13 and 15(d)

Regulatory Requirements and Restrictions - Narrative (Details)

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Regulatory Requirements and Restrictions - Narrative (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Average daily reserve balance requirements, in excess of vault cash, maintained with the Federal Reserve $ 3,800 $ 14,600
Cash segregated under other regulations 4,900 6,300
Securities segregated under other regulations 16,800 14,700
Deposits with clearing organizations $ 10,900 $ 7,600
Bank of America, N.A.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Preceding period of net profits for dividends 2 years  
Cash dividends allowable to be declared and paid by consolidated subsidiaries to the parent company $ 10,300  
Subsidiaries, Bank of America California, N.A.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Cash dividends allowable to be declared and paid by consolidated subsidiaries to the parent company 198  
Subsidiaries, Bank of America California, N.A.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Proceeds from dividends received 62  
Bank of America, N.A.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Proceeds from dividends received $ 10,300