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Cover Page - USD ($)
12 Months Ended
Dec. 31, 2022
Jan. 31, 2023
Jun. 30, 2022
Document Information [Line Items]      
Document Type 10-K    
Document Period End Date Dec. 31, 2022    
Current Fiscal Year End Date --12-31    
Entity File Number 1-11758    
Entity Incorporation, State or Country Code DE    
Entity Address, Address Line One 1585 Broadway    
Entity Address, City or Town New York,    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10036    
Entity Tax Identification Number 36-3145972    
City Area Code (212)    
Local Phone Number 761-4000    
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    
ICFR Auditor Attestation Flag true    
Entity Shell Company false    
Entity Public Float     $ 125,979,662,346
Entity Common Stock, Shares Outstanding   1,681,940,155  
Documents Incorporated by Reference Portions of the Registrant’s definitive proxy statement for its 2023 annual meeting of shareholders are incorporated by reference in Part III of this Form 10-K.    
Amendment Flag false    
Document Fiscal Year Focus 2022    
Document Fiscal Period Focus FY    
Entity Registrant Name MORGAN STANLEY    
Entity Central Index Key 0000895421    
Document Annual Report true    
Document Transition Report false    
Common Stock, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Common Stock, $0.01 par value    
Trading Symbol MS    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series A, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series A, $0.01 par value    
Trading Symbol MS/PA    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series E, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series E, $0.01 par value    
Trading Symbol MS/PE    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series F, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series F, $0.01 par value    
Trading Symbol MS/PF    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series I, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series I, $0.01 par value    
Trading Symbol MS/PI    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series K, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series K, $0.01 par value    
Trading Symbol MS/PK    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series L, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series L, $0.01 par value    
Trading Symbol MS/PL    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series O, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series O, $0.01 par value    
Trading Symbol MS/PO    
Security Exchange Name NYSE    
Non-Cumulative Preferred Stock, Series P, $0.01 par value      
Document Information [Line Items]      
Title of 12(b) Security Non-Cumulative Preferred Stock, Series P, $0.01 par value    
Trading Symbol MS/PP    
Security Exchange Name NYSE    
Global Medium-Term Notes, Series A, Fixed Rate Step-Up Senior Notes Due 2026      
Document Information [Line Items]      
Title of 12(b) Security Global Medium-Term Notes, Series A, Fixed Rate Step-Up Senior Notes Due 2026    
Trading Symbol MS/26C    
Security Exchange Name NYSE    
Global Medium-Term Notes, Series A, Floating Rate Notes Due 2029      
Document Information [Line Items]      
Title of 12(b) Security Global Medium-Term Notes, Series A, Floating Rate Notes Due 2029    
Trading Symbol MS/29    
Security Exchange Name NYSE