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Document and Entity Information - USD ($)
 12 Months Ended
Dec. 31, 2019
Jan. 31, 2020
Jun. 30, 2019
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2019    
Document Transition Report false    
Entity File Number 001-35651    
Entity Registrant Name THE BANK OF NEW YORK MELLON CORPORATION    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 13-2614959    
Entity Address, Address Line One 240 Greenwich Street    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10286    
City Area Code 212    
Local Phone Number 495-1784    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
Entity Shell Company false    
Entity Public Float     $ 41,580,614,768
Entity Common Stock, Shares Outstanding (shares)   890,210,117  
Documents Incorporated by Reference
Portions of the following documents are incorporated by reference in the following parts of this Form 10-K:
The Bank of New York Mellon Corporation 2020 Proxy Statement-Part III
The Bank of New York Mellon Corporation 2019 Annual Report to Shareholders-Parts I, II and IV
    
Amendment Flag false    
Document Fiscal Year Focus 2019    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001390777    
Current Fiscal Year End Date --12-31    
Common Stock, $0.01 par value | New York Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol BK    
Security Exchange Name NYSE    
Series C Noncumulative Perpetual Preferred Stock | New York Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security Depositary Shares, each representing 1/4,000th of a share of Series C Noncumulative Perpetual Preferred Stock    
Trading Symbol BK PrC    
Security Exchange Name NYSE    
6.244% Fixed-to-Floating Rate Normal Preferred Capital Securities of Mellon Capital IV | New York Stock Exchange      
Entity Information [Line Items]      
Title of 12(b) Security 6.244% Fixed-to-Floating Rate Normal Preferred Capital Securities of Mellon Capital IV    
Trading Symbol BK/P    
Security Exchange Name NYSE