v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
Apr. 28, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-40274  
Entity Registrant Name Jackson Financial Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 98-0486152  
Entity Address, Address Line One 1 Corporate Way  
Entity Address, City or Town Lansing  
Entity Address, State or Province MI  
Entity Address, Postal Zip Code 48951  
City Area Code 517  
Local Phone Number 381-5500  
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   69,743,104
Amendment Flag false  
Document Fiscal Period Focus Q1  
Document Fiscal Year Focus 2026  
Current Fiscal Year End Date --12-31  
Entity Central Index Key 0001822993  
Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Common Stock, Par Value $0.01 Per Share  
Trading Symbol JXN  
Security Exchange Name NYSE  
Depositary Shares    
Document Information [Line Items]    
Title of 12(b) Security Depositary Shares, each representing a 1/1,000th interest in a share of Fixed-Rate Reset Noncumulative Perpetual Preferred Stock, Series A  
Trading Symbol JXN PR A  
Security Exchange Name NYSE