2.2.0.7 false CONSOLIDATED STATEMENTS OF INCOME (LOSS) (Parenthetical) (Constellation Energy Group, Inc. and Subsidiaries) (USD $) 0015 - Statement - CONSOLIDATED STATEMENTS OF INCOME (LOSS) (Parenthetical) (Constellation Energy Group, Inc. and Subsidiaries) true false In Millions 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 $ 2 CONSOLIDATED STATEMENTS OF INCOME (LOSS) 0 us-gaap_IncomeStatementAbstract 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 xbrli:stringItemType string No definition available. false 3 Loss from discontinued operations, income taxes 1 us-gaap_DiscontinuedOperationTaxEffectOfAdjustmentToPriorPeriodGainLossOnDisposal us-gaap true debit duration No definition available. false false false false false false false false false false false terselabel false 1 true true false false 1500000 1.5 false false false xbrli:monetaryItemType monetary Tax effect of adjustment to an amount previously reported in discontinued operations that is directly related to the disposal of the component in a prior period. Examples of circumstances leading to such adjustments include the resolution of contingencies relating to the terms of the disposal transaction or relating to the operations of the component prior to its disposal, and the settlement of certain employee benefit plan obligations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 44 false 1 2 false HundredThousands UnKnown UnKnown false true