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Cover Page - shares
 9 Months Ended
Sep. 30, 2025
Oct. 30, 2025
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Sep. 30, 2025  
Document Transition Report false  
Entity File Number 001-31792  
Entity Registrant Name CNO Financial Group, Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 75-3108137  
Entity Address, Address Line One 11299 Illinois Street  
Entity Address, City or Town Carmel,  
Entity Address, State or Province IN  
Entity Address, Postal Zip Code 46032  
City Area Code (317)  
Local Phone Number 817-6100  
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   95,353,512
Entity Central Index Key 0001224608  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Common Stock, par value $0.01 per share    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, par value $0.01 per share  
Trading Symbol CNO  
Security Exchange Name NYSE  
Rights To Purchase Series F Junior Participating Preferred Stock    
Document Information [Line Items]    
Title of 12(b) Security Rights to purchase Series F Junior Participating Preferred Stock  
Security Exchange Name NYSE  
No Trading Symbol Flag true  
5.125% Subordinated Debentures due 2060    
Document Information [Line Items]    
Title of 12(b) Security 5.125% Subordinated Debentures due 2060  
Trading Symbol CNOpA  
Security Exchange Name NYSE