| Cover | May 06, 2022 |
| Cover [Abstract] | |
| Document Type | 8-K/A |
| Amendment Flag | true |
| Amendment Description | On May 6, 2022, Cigna Corporation issued a press release announcing its financial results for the quarter ended March 31, 2022, and filed a Current Report on Form 8-K (the “Original 8-K”) with the Securities and Exchange Commission to furnish the press release. This Amendment No. 1 to the Current Report on Form 8-K/A is being filed solely to furnish the press release furnished in Item 9.01 of the Original 8-K as the press release does not appear in the Original 8-K on the SEC’s website. No other changes have been made to the Original 8-K. |
| Document Period End Date | May 6, 2022 |
| Entity File Number | 001-38769 |
| Entity Registrant Name | Cigna Corporation |
| Entity Central Index Key | 0001739940 |
| Entity Tax Identification Number | 82-4991898 |
| Entity Incorporation, State or Country Code | DE |
| Entity Address, Address Line One | 900 Cottage Grove Road |
| Entity Address, City or Town | Bloomfield |
| Entity Address, State or Province | CT |
| Entity Address, Postal Zip Code | 06002 |
| City Area Code | (860) |
| Local Phone Number | 226-6000 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, Par Value $0.01 |
| Trading Symbol | CI |
| Security Exchange Name | NYSE |
| Entity Emerging Growth Company | false |
