XML 64 R35.htm IDEA: XBRL DOCUMENT
v3.25.1

Nuclear Decommissioning (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2025
Asset Retirement Obligation Disclosure [Abstract] |
Asset Retirement Obligation | The following table provides a rollforward of the nuclear decommissioning AROs reflected in the Consolidated Balance Sheets from December 31, 2024 to March 31, 2025:
Balance as of December 31, 2024 | $ | 12,186 |
Accretion expense | 154 |
Net decrease due to changes in, and timing of, estimated future cash flows | (76) |
Costs incurred related to decommissioning plants | (4) |
Balance as of March 31, 2025 | $ | 12,260 |
Related Party Transactions - Noncurrent Receivables from/Payables to affiliates | The following table presents our noncurrent payables to ComEd, PECO, CenterPoint, and AEP Texas reflected as Payables related to Regulatory Agreement Units in the Consolidated Balance Sheets as of March 31, 2025 and December 31, 2024:
| March 31, 2025 |  | December 31, 2024
ComEd | $ | 3,798 |  |  | $ | 3,780 |
PECO | 312 |  |  | 247 |
CenterPoint | 359 |  |  | 365 |
AEP Texas | 124 |  |  | 126 |
Payables related to Regulatory Agreement Units | $ | 4,593 |  |  | $ | 4,518 |

X
- Definition Related Party Transactions - Noncurrent Receivables from/Payables to affiliates [Table Text Block] + References No definition available. + Details
Name: | ceg_RelatedPartyTransactionsNoncurrentReceivablesfromPayablestoaffiliatesTableTextBlock
Namespace Prefix: | ceg_
Data Type: | dtr-types1:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AssetRetirementObligationDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the changes in carrying amount of a liability for asset retirement obligations, for changes such as new obligations, changes in estimates of existing obligations, spending on existing obligations, property dispositions, and foreign currency translation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
Name: | us-gaap_ScheduleOfChangeInAssetRetirementObligationTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration