v3.26.3
Cover Page
Sep. 17, 2026
Document Information [Line Items]  
Document Type 8-K
Amendment Flag false
Document Period End Date Sep. 17, 2026
Entity File Number 1-9924
Entity Registrant Name Citigroup Inc.
Entity Central Index Key 0000831001
Entity Tax Identification Number 52-1568099
Entity Incorporation, State or Country Code DE
Entity Address, Address Line One 388 Greenwich Street
Entity Address, City or Town New York
Entity Address, State or Province NY
Entity Address, Postal Zip Code 10013
City Area Code 212
Local Phone Number 559-1000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Common Stock [Member]  
Document Information [Line Items]  
Title of 12(b) Security Common Stock, par value $.01 per share
Trading Symbol C
Security Exchange Name NYSE
Noncumulative Preferred Stock Series II [Member]  
Document Information [Line Items]  
Title of 12(b) Security Dep Shs, represent 1/1,000th interest in a share of 6.250% Noncum Pref Stk, Ser II
Trading Symbol C PR R
Security Exchange Name NYSE
Citigroup Capital III [Member]  
Document Information [Line Items]  
Title of 12(b) Security 7.625% TRUPs of Cap III (and registrant’s guaranty)
Trading Symbol C/36Y
Security Exchange Name NYSE
Citigroup Capital XIII [Member]  
Document Information [Line Items]  
Title of 12(b) Security 7.875% FXD / FRN TruPS of Cap XIII (and registrant’s guaranty)
Trading Symbol C N
Security Exchange Name NYSE
Series N Medium Term Senior Notes Due Apr 2028 [Member]  
Document Information [Line Items]  
Title of 12(b) Security MTN, Series N, Floating Rate Notes Due Apr 26, 2028 of CGMHI (and registrant’s guaranty)
Trading Symbol C/28
Security Exchange Name NYSE
Series N Medium Term Senior Notes Due Sept 2026 [Member]  
Document Information [Line Items]  
Title of 12(b) Security MTN, Series N, Floating Rate Notes Due Sept 2026 of CGMHI (and registrant’s guaranty)
Trading Symbol C/26
Security Exchange Name NYSE
Series N Medium Term Senior Notes Due Sept 2028 [Member]  
Document Information [Line Items]  
Title of 12(b) Security MTN, Series N, Floating Rate Notes Due Sept 2028 of CGMHI (and registrant’s guaranty)
Trading Symbol C/28A
Security Exchange Name NYSE
Series N Medium Term Senior Notes Due Oct 2028 [Member]  
Document Information [Line Items]  
Title of 12(b) Security MTN, Series N, Floating Rate Notes Due Oct 2028 of CGMHI (and registrant’s guaranty)
Trading Symbol C/28B
Security Exchange Name NYSE
Series N Medium Term Senior Notes Due Mar 2029 [Member]  
Document Information [Line Items]  
Title of 12(b) Security MTN, Series N, Floating Rate Notes Due Mar 2029 of CGMHI (and registrant’s guaranty)
Trading Symbol C/29A
Security Exchange Name NYSE