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Cover Page - USD ($)
 12 Months Ended
Dec. 31, 2023
Feb. 01, 2024
Jun. 30, 2023
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2023    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-36636    
Entity Registrant Name CITIZENS FINANCIAL GROUP INC/RI    
Entity Incorporation, State or Country Code DE    
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 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    
Document Financial Statement Error Correction Flag false    
Entity Shell Company false    
Entity Public Float     $ 12,304,245,801
Entity Common Stock, Shares Outstanding   458,756,723  
Documents Incorporated by Reference
Portions of Citizens Financial Group, Inc.’s proxy statement to be filed with the United States Securities and Exchange Commission in connection with Citizens Financial Group, Inc.’s 2024 annual meeting of stockholders (the “Proxy Statement”) are incorporated by reference into Part III hereof. Such Proxy Statement will be filed within 120 days of Citizens Financial Group, Inc.’s fiscal year ended December 31, 2023.
    
Entity Central Index Key 0000759944    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Common Stock      
Document 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      
Document 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      
Document 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