v3.25.3
Insurance and Contractholder Liabilities - Unpaid Claims and Claim Expenses - Cigna Healthcare - Activity (Details) - USD ($)
$ in Millions
9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Dec. 31, 2023
Held-for-Sale | Medicare Advantage and related Cigna Healthcare businesses        
Paid costs related to:        
Unpaid claims classified as liabilities of business held for sale       $ 823
Cigna Healthcare        
Liability for Claims and Claims Adjustment Expense [Line Items]        
Total of incurred but not reported liabilities plus expected claim development on reported claims and reported claims in process $ 4,500 $ 4,700    
Liability for Unpaid Claims and Claims Adjustment Expense [Roll Forward]        
Beginning balance, including held for sale liabilities 5,018 5,092    
Less: Reinsurance, including held for sale liabilities 159 236    
Beginning balance, net, including held for sale liabilities 4,859 4,856    
Incurred costs related to:        
Current year 25,763 28,314    
Prior years (319) (422)    
Total incurred 25,444 27,892    
Paid costs related to:        
Current year 20,399 23,761    
Prior years 4,055 4,059    
Total paid 24,454 27,820    
Less: Divestiture and other 1,323 0    
Ending balance, net 4,526      
Add: Reinsurance and other amounts recoverable 150      
Ending balance $ 4,676      
Ending balance, net, including held for sale liabilities   4,928    
Add: Reinsurance, including held for sale liabilities   160    
Ending balance, including held for sale liabilities   5,088    
Cigna Healthcare | Held-for-Sale | Medicare Advantage and related Cigna Healthcare businesses        
Paid costs related to:        
Unpaid claims classified as liabilities of business held for sale   $ 937 $ 983