v3.25.3
Divestiture (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Mar. 19, 2025
Dec. 31, 2025
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Jan. 31, 2024
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]                
Integration and transaction-related costs     $ 7 $ 77 $ 297 $ 177    
Integration and transaction-related costs, after-tax     6 59 226 135    
Disposed of by Sale | Medicare Advantage and related Cigna Healthcare businesses | Health Care Service Corporation (HCSC)                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Cash proceeds from sale of business $ 4,200              
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax [Abstract]                
Estimated loss on sale, pre-tax     38   75      
Estimated loss on sale, after-tax     $ 241   $ 353      
Loss on sale of businesses, location, Consolidated Statements of Income         Gain (loss) on sale of businesses      
Disposed of by Sale | Medicare Advantage and related Cigna Healthcare businesses | Health Care Service Corporation (HCSC) | Forecast                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Cash proceeds from sale of business   $ 600            
Held-for-Sale | Medicare Advantage and related Cigna Healthcare businesses                
Disposal Group, Including Discontinued Operation, Balance Sheet Disclosures [Abstract]                
Cash and cash equivalents             $ 1,339  
Investments             1,444  
Accounts receivable, net             1,927  
Other assets, including Goodwill             2,294  
Goodwill classified as Assets of businesses held for sale             94  
Total assets of businesses held for sale             7,004  
Insurance and contractholder liabilities       $ 1,568   $ 1,568 1,579  
All other liabilities             831  
Total liabilities of businesses held for sale             $ 2,410  
Held-for-Sale | Medicare Advantage and related Cigna Healthcare businesses | Health Care Service Corporation (HCSC)                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Sale price $ 4,900             $ 3,300