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Shareholders Equity and Dividend Restrictions (Details) - USD ($)
$ in Billions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Equity [Abstract]      
Net income $ 5.3 $ 5.7 $ 3.4
Surplus 14.9 $ 16.4 $ 13.3
Minimum statutory surplus required by regulators 4.8    
Investments on deposit with regulatory bodies 0.3    
Maximum dividend distributions permitted in 2024 without regulatory approval 2.1    
Maximum loans to the parent company permitted without regulatory approval 1.4    
Restricted GAAP net assets of The Cigna Group's subsidiaries 12.3    
Undistributed earnings from equity method subidiaries $ 1.0