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, 2019
Dec. 31, 2018
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 $ 14,600 $ 11,400
Cash segregated under other regulations 6,300 5,800
Securities segregated under other regulations 14,700 16,600
Deposits with clearing organizations 7,600 $ 8,100
Proceeds from subsidiary $ 8,000  
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 parent company by consolidated subsidiaries $ 9,400  
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 parent company by consolidated subsidiaries 94  
Subsidiaries, Bank of America California, N.A.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Proceeds from dividends received 215  
Bank of America, N.A.    
Compliance with Regulatory Capital Requirements under Banking Regulations [Line Items]    
Proceeds from dividends received $ 20,500