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Document and Entity Information Document
 6 Months Ended
Jun. 14, 2024
Jun. 30, 2024
Document and Entity Information [Line Items]    
Entity Registrant Name CITIZENS FINANCIAL GROUP INC/RI  
Amendment Flag false  
Entity Central Index Key 0000759944  
Document Type 8-K  
Document Period End Date Jun. 13, 2024  
Entity Incorporation, State or Country Code DE  
Entity File Number 001-36636  
Entity Tax Identification Number 05-0412693  
Entity Address, Address Line One One Citizens Plaza  
Entity Address, City or Town Providence,  
Entity Address, State or Province RI  
Entity Address, Postal Zip Code 02903  
City Area Code 203  
Local Phone Number 900-6715  
Entity Emerging Growth Company false  
Written Communications false  
Soliciting Material false  
Pre-commencement Tender Offer false  
Pre-commencement Issuer Tender Offer false  
Common Stock [Member]    
Document and Entity Information [Line Items]    
Title of 12(b) Security Common stock, $0.01 par value per share  
Trading Symbol CFG  
Security Exchange Name NYSE  
Series D Preferred Stock [Member]    
Document and Entity Information [Line Items]    
Title of 12(b) Security Depositary Shares, each representing a 1/40th interest in a share of 6.350% Fixed-to-Floating Rate Non-Cumulative Perpetual Preferred Stock, Series D  
Trading Symbol CFG PrD  
Security Exchange Name NYSE  
Series E Preferred Stock [Member]    
Document and Entity Information [Line Items]    
Title of 12(b) Security Depositary Shares, each representing a 1/40th interest in a share of 5.000% Fixed-Rate Non-Cumulative Perpetual Preferred Stock, Series E  
Trading Symbol CFG PrE  
Security Exchange Name NYSE  
Series H Preferred Stock    
Document and Entity Information [Line Items]    
Title of 12(b) Security   Depositary Shares, each representing a 1/40th interest in a share of 7.375% Fixed-Rate Non-Cumulative Perpetual Preferred Stock, Series H
Trading Symbol   CFG PrH
Security Exchange Name   NYSE