Depositary Shares, each representing 1/1,000th interest in a share of Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series E, $0.01 par value Series E Preferred Stock [Member] Entity Tax Identification Number Entity Tax Identification Number Series Q Preferred Stock Series Q Preferred Stock [Member] Series Q Preferred Stock Depositary Shares, each representing 1/1,000th interest in a share of Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series I, $0.01 par value Series I Preferred Stock [Member] Series I Preferred Stock Entity File Number Entity File Number Cover [Abstract] Title of 12(b) Security Title of 12(b) Security Local Phone Number Local Phone Number Class of Stock [Domain] Class of Stock [Domain] Soliciting Material Soliciting Material Entity Address, Address Line One Entity Address, Address Line One Entity Address, Postal Zip Code Entity Address, Postal Zip Code Entity Registrant Name Entity Registrant Name Entity Address, State or Province Entity Address, State or Province Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Written Communications Written Communications Trading Symbol Trading Symbol Depositary Shares, each representing 1/1,000th interest in a share of 6.500% Non-Cumulative Preferred Stock, Series P, $0.01 par value Series P Preferred Stock [Member] Series P Preferred Stock City Area Code City Area Code Depositary Shares, each representing 1/1,000th interest in a share of Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series K, $0.01 par value Series K Preferred Stock [Member] Series K Preferred Stock Depositary Shares, each representing 1/1,000th interest in a share of Floating Rate Non-Cumulative Preferred Stock, Series A, $0.01 par value Series A Preferred Stock [Member] Document Information [Table] Document Information [Table] Common Stock, $0.01 par value Common Class A [Member] Global Medium-Term Notes, Series A, Floating Rate Notes Due 2029 of Morgan Stanley Finance LLC (and Registrant’s guarantee with respect thereto) Global Medium Term Notes Series A Floating Rate Notes Due2029 Of Morgan Stanley Finance L L C [Member] Global Medium Term Notes Series A Floating Rate Notes Due 2029 Of Morgan Stanley Finance LLC Document Period End Date Document Period End Date Amendment Flag Amendment Flag Pre-commencement Issuer Tender Offer Pre-commencement Issuer Tender Offer Entity Address, City or Town Entity Address, City or Town Security Exchange Name Security Exchange Name Depositary Shares, each representing 1/1,000th interest in a share of 4.250% Non-Cumulative Preferred Stock, Series O, $0.01 par value Series O Preferred Stock [Member] Series O Preferred Stock Document Information [Line Items] Document Information [Line Items] Document Type Document Type Depositary Shares, each representing 1/1,000th interest in a share of 4.875% Non-Cumulative Preferred Stock, Series L, $0.01 par value Series L Preferred Stock [Member] Series L Preferred Stock Class of Stock [Axis] Class of Stock [Axis] Depositary Shares, each representing 1/1,000th interest in a share of Fixed-to-Floating Rate Non-Cumulative Preferred Stock, Series F, $0.01 par value Series F Preferred Stock [Member] Pre-commencement Tender Offer Pre-commencement Tender Offer Entity Central Index Key Entity Central Index Key Entity Emerging Growth Company Entity Emerging Growth Company