v3.24.3
Insurance and Contractholder Liabilities - Future Policy Benefits - Present Values of Expected Premiums and Benefits (Details) - USD ($)
$ in Millions
 9 Months Ended
Sep. 30, 2024
Sep. 30, 2023
Dec. 31, 2023
Dec. 31, 2022
Cigna Healthcare        
Liability for Future Policy Benefit, Expected Net Premium [Roll Forward]        
Beginning balance $ 9,233 $ 8,557    
Reversal of effect of beginning of period discount rate assumptions 1,154 1,537    
Effect of assumption changes and actual variances from expected experience     $ 3 $ 314
Issuances and lapses 1,392 822    
Net premiums collected (1,065) (1,019)    
Interest and other 680 58    
Ending balance at original discount rate 11,397 10,269    
Effect of end of period discount rate assumptions (865) (1,681)    
Ending balance 10,532 8,588 9,233 8,557
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Beginning balance 9,633 8,945    
Reversal of effect of discount rate assumptions 1,220 1,611    
Effect of assumption changes and actual variances from expected experience (2)     203 112
Issuances and lapses 1,316 902    
Benefit payments (1,096) (1,017)    
Interest and other 580 184    
Ending balance at original discount rate 11,856 10,737    
Effect of discount rate assumptions (926) (1,765)    
Ending balance 10,930 8,972 9,633 8,945
Liability for future policy benefits 398 384    
Other 201 206    
Total liability for future policy benefits   590    
Total liability for future policy benefits, including assets held for sale 599      
Effect of actual variances from expectations (43) (12)    
Undiscounted expected future gross premiums 20,700 18,500    
Discounted expected future gross premiums 14,400 12,500    
Undiscounted expected future policy benefits 15,600 13,100    
Future policy benefits reserve, reinsurance recoverables 73 154    
Cigna Healthcare | Held-for-Sale | Medicare Advantage and related Cigna Healthcare businesses        
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Future policy benefits classified as liabilities of business held for sale 422   429  
Future policy benefits reserve, reinsurance recoverables reported in assets of businesses held for sale 78      
Other Operations        
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]        
Total liability for future policy benefits 3,458 3,380 3,538  
Undiscounted expected future policy benefits 4,300 4,500    
Future policy benefits reserve, reinsurance recoverables 900 1,000    
Deferred profit liability included in future policy benefits 400 400    
Future policy benefit, excluding deferred profit liability $ 3,100 $ 3,000 $ 3,200 $ 3,200