Description of Business	3 Months Ended
Description of Business	Mar. 31, 2022
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business	Note 1 – Description of Business Cigna Corporation, together with its subsidiaries (either individually or collectively referred to as "Cigna," the "Company," "we," "our" or "us") is a global health services organization with a mission of helping those we serve improve their health, well-being and peace of mind by making health care affordable, predictable and simple. Our subsidiaries offer a differentiated set of pharmacy, medical, behavioral, dental and supplemental products and services. The majority of these products are offered through employers and other groups such as governmental and non-governmental organizations, unions and associations. Cigna also offers commercial health and dental insurance and Medicare products to individuals in the United States and selected international markets. In addition to these ongoing operations, Cigna also has certain run-off operations. Details of the Company's reporting segments and recent changes are provided below: We entered into a definitive agreement in October 2021 to sell our life, accident and supplemental benefits businesses in several countries to Chubb INA Holdings, Inc. ("Chubb"). As of March 31, 2022, we now expect to sell our life, accident and supplemental benefits businesses in six countries (Hong Kong, Indonesia, New Zealand, South Korea, Taiwan and Thailand) to Chubb for $5.72 billion in cash (the "Chubb Transaction"); we no longer expect to sell our interest in a joint venture in Turkey as part of the Chubb Transaction. See Note 5 for further information on the classification of these businesses as held for sale. In connection with the pending Chubb Transaction, we revised our business reporting structure. As such, we adjusted our segment reporting effective in the fourth quarter of 2021 and segment results for the three months ended March 31, 2021 have been restated to conform to the new segment presentation (see Note 19). A full description of our segments follows: Evernorth includes a broad range of coordinated and point solution health services and capabilities, as well as those from partners across the health care system, in pharmacy solutions, benefits management solutions, care delivery and care management solutions and intelligence solutions, which are provided to health plans, employers, government organizations and health care providers. Cigna Healthcare includes U.S. Commercial, U.S. Government and International Health operating segments that provide comprehensive medical and coordinated solutions to clients and customers. U.S. Commercial products and services include medical, pharmacy, behavioral health, dental, vision, health advocacy programs and other products and services for insured and self-insured customers. U.S. Government solutions include Medicare Advantage, Medicare Supplement and Medicare Part D plans for seniors and individual health insurance plans both on and off the public exchanges. International Health solutions include health care coverage in our international markets, as well as health care benefits for globally mobile individuals and employees of multinational organizations. Other Operations contains the remainder of our business operations, consisting of the following: •Ongoing business: •Corporate-Owned Life Insurance ("COLI") offers permanent insurance contracts sold to corporations to provide coverage on the lives of certain employees for the purpose of financing employer-paid future benefit obligations. •Our interest in a joint venture in Turkey. •Exiting businesses: •International Life, Accident and Supplemental Benefits Businesses in six countries to be sold pursuant to the Chubb Transaction. •Run-off businesses: •Reinsurance: predominantly comprised of guaranteed minimum death benefit ("GMDB") and guaranteed minimum income benefit ("GMIB") business effectively exited through reinsurance with Berkshire Hathaway Life Insurance Company of Nebraska ("Berkshire") in 2013. •Settlement Annuity and other businesses in run-off. •Individual Life Insurance and Annuity and Retirement Benefits businesses: deferred gains from the sales of these businesses. Corporate reflects amounts not allocated to operating segments, including net interest expense (defined as interest on corporate debt less net investment income on investments not supporting segment and other operations), certain litigation matters, expense associated with our frozen pension plans, charitable contributions, severance, certain overhead and enterprise-wide project costs and intersegment eliminations for products and services sold between segments.