2.2.0.7 true Commitments, Guarantees, and Contingencies (Details 3) (USD $) 4122 - Disclosure - Commitments, Guarantees, and Contingencies (Details 3) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 USDPerShare Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD true false false false ceg_CENGMember dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi ceg_CENGMember dei_LegalEntityAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 3 USD true false false false ceg_CENGMember dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi ceg_CENGMember dei_LegalEntityAxis explicitMember false false ceg_NuclearAccidentsMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_NuclearAccidentsMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 4 true false false false ceg_LitigationMergerWithMidAmericanMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_LitigationMergerWithMidAmericanMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 5 true false false false ceg_LitigationSecuritiesClassActionMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_LitigationSecuritiesClassActionMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 6 true false false false ceg_LitigationERISAActionsMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_LitigationERISAActionsMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 7 USD true false false false ceg_LitigationMercuryMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_LitigationMercuryMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 8 true false false false ceg_LitigationAsbestosMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_LitigationAsbestosMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 9 true false false false ceg_EnvironmentalMattersSolidAndHazardousWasteMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_EnvironmentalMattersSolidAndHazardousWasteMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 10 USD true false false false ceg_EnvironmentalMattersAirQualityMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_EnvironmentalMattersAirQualityMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ false 11 USD true false false false ceg_EnvironmentalMattersWaterQualityMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_EnvironmentalMattersWaterQualityMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 12 USD true false false false ceg_EnvironmentalMattersWaterQualityMember us-gaap_LossContingenciesByNatureOfContingencyAxis xbrldi http://xbrl.org/2006/xbrldi ceg_EnvironmentalMattersWaterQualityMember us-gaap_LossContingenciesByNatureOfContingencyAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ 4 Loss Contingencies 2 us-gaap_LossContingenciesLineItems us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:stringItemType string Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. false 5 Shareholders filing lawsuits in Circuit Court, number 3 ceg_LossContingencyShareholdersFilingLawsuitsCircuitCourtNumber ceg false na duration The number of shareholders filing lawsuits in the Circuit Court. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 7 7 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of shareholders filing lawsuits in the Circuit Court. No authoritative reference available. false 6 Lawsuits filed in District Court, number 3 ceg_LossContingencyLawsuitsFiledDistrictCourtNumber ceg false na duration The number of lawsuits filed in the District Court. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 4 4 true false false 5 false true false false 3 3 true false false 6 false true false false 1 1 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of lawsuits filed in the District Court. No authoritative reference available. false 7 Lawsuits voluntarily dismissed, number 3 ceg_LossContingencyLawsuitsVoluntarilyDismissed ceg false na duration The number of federal merger cases voluntarily dismissed. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 1 1 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of federal merger cases voluntarily dismissed. No authoritative reference available. false 8 Lawsuits transferred to other District Court for coordination, number 3 ceg_LossContingencyLawsuitsTransferredToOtherDistrictCourt ceg false na duration The number of lawsuits transferred to a different District Court for coordination. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false 2 2 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of lawsuits transferred to a different District Court for coordination. No authoritative reference available. false 9 Defendants in addition to BGE and Constellation Energy, number 3 ceg_AdditionalDefendantsNumber ceg false na duration The number of parties, other than the reporting entity and its subsidiaries, who have been involved in legal or environmental... false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 11 11 true false false 8 false false false false 0 0 true false false 9 false true false false 19 19 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of parties, other than the reporting entity and its subsidiaries, who have been involved in legal or environmental actions. No authoritative reference available. false 10 Lawsuits dismissed without prejudice, number 3 ceg_LossContingencyLawsuitsDismissedWithoutPrejudice ceg false na duration The number of lawsuits where plaintiffs' counsel has filed dismissals without prejudice. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 6 6 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of lawsuits where plaintiffs' counsel has filed dismissals without prejudice. No authoritative reference available. false 11 Lawsuits filed, number 3 ceg_LossContingencyLawsuitsFiledNumber ceg false na duration The number of lawsuits filed. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false true false false 7 7 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 70 70 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of lawsuits filed. No authoritative reference available. false 12 Claimants, number 3 us-gaap_LossContingencyPendingClaimsNumber us-gaap true na instant No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0     true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false true false false 132 132 true false false 8 false true false false 494 494 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The total amount of pending claims pertaining to a loss contingency accrual as of the balance sheet date. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9, 10, 11, 12 false 13 Compensatory damages sought per claimant 3 ceg_CompensatoryDamagesSoughtAmountPerClaimant ceg false debit duration The amount of compensatory damages sought by each claimant. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 true true false false 20000000 20000000 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The amount of compensatory damages sought by each claimant. No authoritative reference available. false 14 Fossil fuel plants involved, number 3 ceg_FossilFuelPlantsInvolvedNumber ceg false na duration The number of fossil fuel plants involved in the matter. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false true false false 3 3 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of fossil fuel plants involved in the matter. No authoritative reference available. false 15 Consent decree penalty 3 ceg_ConsentDecreePenalty ceg false debit duration The penalty assessed under a consent decree. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false true false false 100000 100000 true false false 11 false true false false 1000000 1000000 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The penalty assessed under a consent decree. No authoritative reference available. false 16 Consent decree payment for supplemental environmental project 3 ceg_ConsentDecreePaymentForSupplementalProject ceg false debit duration The amount which the entity is required to pay for a supplemental environmental project under a consent decree. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false true false false 100000 100000 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The amount which the entity is required to pay for a supplemental environmental project under a consent decree. No authoritative reference available. false 17 Approximate ownership percentage in Keystone plant (in hundredths) 3 ceg_EquityMethodInvestmentOwnershipPercentageCoalFiredPowerPlant ceg false na duration The percentage of undivided ownership interest in the Keystone coal-fired power plant. false false false false false false false false false false false terselabel false 1 false true false false 0.2099 0.2099 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false true false false 0.21 0.21 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false us-types:percentItemType pure The percentage of undivided ownership interest in the Keystone coal-fired power plant. No authoritative reference available. false 18 Accrual for Environmental (Loss) Contingencies 3 us-gaap_AccrualForEnvironmentalLossContingenciesRollForward us-gaap true na duration No definition available. false false false false false true false false false false false false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:stringItemType string A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. false 19 Environmental loss contingencies 4 us-gaap_AccrualForEnvironmentalLossContingencies us-gaap true credit instant No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0     true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false true false false 3600000 3600000 true false false 12 false true false false 8400000 8400000 true false false xbrli:monetaryItemType monetary Total costs accrued as of the balance sheet date for environmental loss contingencies. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Statement of Position (SOP) -Number 96-1 -Paragraph 161 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 5 -Paragraph 9 false 20 Environmental loss contingencies payments 4 ceg_AccrualForEnvironmentalLossContingenciesPaymentsSinceInception ceg false debit duration The aggregate amount disbursed to date to settle environmental loss contingencies. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false true false false 4800000 4800000 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The aggregate amount disbursed to date to settle environmental loss contingencies. No authoritative reference available. false 21 Additional costs reasonably possible 4 ceg_EnvironmentalExitCostsReasonablyPossibleAdditionalLossesAmount ceg false debit duration Estimate of the amount of reasonably possible loss exposure in excess of the amount accrued for remediation, site... false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false true false false 10000000 10000000 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary Estimate of the amount of reasonably possible loss exposure in excess of the amount accrued for remediation, site restoration, post closure, monitoring commitments, or other exit costs associated with the sale, disposal or abandonment of a particular property resulting from unanticipated contamination of the assets. No authoritative reference available. false 22 Percent of membership interest in CENG sold (in hundredths) 3 ceg_MembershipInterestSalePercentage ceg false na instant The percentage of ownership interest in a subsidiary that was sold during the period. false false false false false false false false false false false terselabel false 1 false true false false 0.4999 0.4999 false false false 2 false true false false 0.4999 0.4999 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false us-types:percentItemType pure The percentage of ownership interest in a subsidiary that was sold during the period. No authoritative reference available. false 23 Percentage of ownership interest in equity investment (in hundredths) 3 us-gaap_EquityMethodInvestmentOwnershipPercentage us-gaap true na instant No definition available. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false true false false 0.5001 0.5001 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false us-types:percentItemType pure The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) false 24 Number of nuclear generating units owned, operated and maintained by CENG 3 ceg_NumberOfNuclearGeneratingUnits ceg false na duration The number of nuclear generating units owned, operated and maintained by a nuclear generation joint venture in which the... false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false true false false 5 5 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:integerItemType integer The number of nuclear generating units owned, operated and maintained by a nuclear generation joint venture in which the reporting segment has an interest. No authoritative reference available. false 25 Commercial insurance available 3 ceg_PrivatePrimaryInsurancePurchased ceg false debit duration The maximum amount of private primary insurance available, which was purchased. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false true false false 375000000 375000000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The maximum amount of private primary insurance available, which was purchased. No authoritative reference available. false 26 Retrospective premium assessment per reactor, per incident 3 ceg_RetrospectivePremiumAssessmentEach ceg false debit duration The amount of the retrospective premium assessment per reactor, per incident required by participation in an industry-wide... false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false true false false 117500000 117500000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The amount of the retrospective premium assessment per reactor, per incident required by participation in an industry-wide program for nuclear accidents. No authoritative reference available. false 27 Total insurance available for public liability related to nuclear accidents 3 ceg_InsuranceAvailableForPublicLiability ceg false credit duration The total amount of insurance for public liability available from all sources. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false true false false 12600000000 12600000000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The total amount of insurance for public liability available from all sources. No authoritative reference available. false 28 Limit on assessment of retrospective premiums per incident 3 ceg_LimitOnAssessmentOfRetrospectivePremiumsPerIncident ceg false debit duration The maximum retrospective premiums that can be assessed per nuclear incident. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false true false false 587500000 587500000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The maximum retrospective premiums that can be assessed per nuclear incident. No authoritative reference available. false 29 Maximum amount of retrospective premium payable per nuclear incident per year 3 ceg_RetrospectivePremiumPayablePerIncidentPerYearMaximum ceg false debit duration The maximum retrospective premiums that are payable per nuclear incident per year. false false false false false false false false false false false terselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 true false false 3 false true false false 87500000 87500000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary The maximum retrospective premiums that are payable per nuclear incident per year. No authoritative reference available. false 30 Maximum per occurrence insurance coverage for Certified acts of terrorism 3 ceg_PropertyInsuranceCoverageForCertifiedActsOfTerrorismLimit ceg false debit duration Maximum coverage per occurrence for Certified acts of terrorism as defined under the Terrorism Risk Insurance Extension Act... false false false false false false false false false false false terselabel false 1 false true false false 1000000000 1000000000 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary Maximum coverage per occurrence for Certified acts of terrorism as defined under the Terrorism Risk Insurance Extension Act of 2005 and the Terrorism Risk Insurance Program Reauthorization Act of 2007 provided by the reporting entity's insurance arrangement. No authoritative reference available. false 31 Maximum annual aggregate insurance coverage for non-certified acts of terrorism 3 ceg_PropertyInsuranceCoverageForNonCertifiedActsOfTerrorismLimit ceg false debit duration Maximum annual aggregate insurance coverage for non-certified acts of terrorism provided by the reporting entity's insurance... false false false false false false false false false false false terselabel false 1 true true false false 1000000000 1000000000 false false false 2 false false false false 0 0 true false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false 7 false false false false 0 0 true false false 8 false false false false 0 0 true false false 9 false false false false 0 0 true false false 10 false false false false 0 0 true false false 11 false false false false 0 0 true false false 12 false false false false 0 0 true false false xbrli:monetaryItemType monetary Maximum annual aggregate insurance coverage for non-certified acts of terrorism provided by the reporting entity's insurance arrangement. No authoritative reference available. false 12 28 false NoRounding UnKnown UnKnown false true