Cover Page - shares	6 Months Ended
	Jun. 30, 2022	Jul. 29, 2022
Document Information [Line Items]
Document Type	10-Q
Document Period End Date	Jun. 30, 2022
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 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 Common Stock, Shares Outstanding		1,716,826,307
Amendment Flag	false
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q2
Entity Central Index Key	0000895421
Current Fiscal Year End Date	--12-31
Entity Registrant Name	MORGAN STANLEY
Document Quarterly 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