| Cover | Feb. 01, 2022 |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 1, 2022 |
| Entity File Number | 001-41137 |
| Entity Registrant Name | CONSTELLATION ENERGY CORPORATION |
| Entity Central Index Key | 0001868275 |
| Entity Tax Identification Number | 87-1210716 |
| Entity Incorporation, State or Country Code | PA |
| Entity Address, Address Line One | 1310 Point Street |
| Entity Address, City or Town | Baltimore |
| Entity Address, State or Province | MD |
| Entity Address, Postal Zip Code | 21231 |
| City Area Code | 610 |
| Local Phone Number | 765-5959 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Title of 12(b) Security | Common Stock, without par value |
| Trading Symbol | CEG |
| Security Exchange Name | NASDAQ |
| Entity Emerging Growth Company | false |
| Entity Information, Former Legal or Registered Name | EXELON GENERATION COMPANY, LLC |
| Former Address [Member] | |
| Document Information [Line Items] | |
| Entity Address, Address Line One | 300 Exelon Way |
| Entity Address, City or Town | Kennett Square |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19348-2473 |
| CONSTELLATION ENERGY GENERATION, LLC [MEMBER] | |
| Document Information [Line Items] | |
| Document Type | 8-K |
| Amendment Flag | false |
| Document Period End Date | Feb. 1, 2022 |
| Entity File Number | 333-85496 |
| Entity Registrant Name | CONSTELLATION ENERGY GENERATION, LLC |
| Entity Central Index Key | 0001168165 |
| Entity Tax Identification Number | 23-3064219 |
| Entity Incorporation, State or Country Code | PA |
| Entity Address, Address Line One | 200 Exelon Way |
| Entity Address, City or Town | Kennett Square |
| Entity Address, State or Province | PA |
| Entity Address, Postal Zip Code | 19348-2473 |
| City Area Code | 610 |
| Local Phone Number | 765-5959 |
| Written Communications | false |
| Soliciting Material | false |
| Pre-commencement Tender Offer | false |
| Pre-commencement Issuer Tender Offer | false |
| Entity Emerging Growth Company | false |
