1.0.0.3 false CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions false 1 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 4 Cash Flows From Operating Activities 2 us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 5 Net Income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 95000000 95 false false 2 true true 217000000 217 false false No definition available. No authoritative reference available. false 6 Loss from discontinued operations 3 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 4000000 4 false false 2 false true 6000000 6 false false No definition available. No authoritative reference available. false 7 Income from continuing operations, net 3 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 99000000 99 false false 2 false true 223000000 223 false false No definition available. No authoritative reference available. false 8 Adjustments to reconcile income to net cash used in operating activities: 3 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 9 Equity in income from unconsolidated affiliates 4 eme_IncomeLossFromEquityMethodInvestmentsCashFlowImpact eme false credit duration monetary This item represents the entity's proportionate share for the period of the undistributed net income (loss) of its investee... false false false false false false false false false 1 false true -26000000 -26 false false 2 false true -48000000 -48 false false This item represents the entity's proportionate share for the period of the undistributed net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. No authoritative reference available. false 10 Distributions from unconsolidated affiliates 4 us-gaap_EquityMethodInvestmentDividendsOrDistributions us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 21000000 21 false false 2 false true 40000000 40 false false No definition available. No authoritative reference available. false 11 Depreciation and amortization 4 eme_DepreciationAndAmortizationCashFlowImpact eme false debit duration monetary The cash flow impact of the current period expense charged against earnings on long-lived, physical assets used in the normal... false false false false false false false false false 1 false true 115000000 115 false false 2 false true 92000000 92 false false The cash flow impact of the current period expense charged against earnings on long-lived, physical assets used in the normal conduct of business and not intended for resale to allocate or recognize the cost of assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset. Examples include buildings, production equipment and customer lists, deferred financing costs, and accretion of discounted liabilities. No authoritative reference available. false 12 Deferred taxes and tax credits 4 us-gaap_DeferredIncomeTaxesAndTaxCredits us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 209000000 209 false false 2 false true 28000000 28 false false No definition available. No authoritative reference available. false 13 (Gain) on buyout of contract and (gain) loss on sale of assets 4 us-gaap_GainLossOnContractTermination us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 1000000 1 false false 2 false true -16000000 -16 false false No definition available. No authoritative reference available. false 14 Changes in operating assets and liabilities: 4 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 15 Increase in margin and collateral deposits 5 us-gaap_IncreaseDecreaseInMarginDepositsOutstanding us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -12000000 -12 false false 2 false true -93000000 -93 false false No definition available. No authoritative reference available. false 16 Increase in accounts receivable 5 us-gaap_IncreaseDecreaseInReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -127000000 -127 false false 2 false true -127000000 -127 false false No definition available. No authoritative reference available. false 17 Increase in inventory 5 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -31000000 -31 false false 2 false true -23000000 -23 false false No definition available. No authoritative reference available. false 18 Decrease in prepaid expenses and other 5 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 36000000 36 false false 2 false true 42000000 42 false false No definition available. No authoritative reference available. false 19 Increase in restricted cash 5 us-gaap_IncreaseDecreaseInRestrictedCashForOperatingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -188000000 -188 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 20 Increase in rent payments in excess of levelized rent expense 5 eme_IncreaseInRentPaymentsInExcessOfLevelizedRentExpense eme false credit duration monetary The net change during the reporting period in the aggregate value of rent payments in excess of levelized rent expense under... false false false false false false false false false 1 false true -113000000 -113 false false 2 false true -113000000 -113 false false The net change during the reporting period in the aggregate value of rent payments in excess of levelized rent expense under plant operating leases. No authoritative reference available. false 21 Increase (decrease) in accounts payable and other current liabilities 5 eme_IncreaseDecreaseInAccountsPayableAndOtherCurrentLiabilities eme false debit duration monetary The net change during the reporting period in the aggregate amount of obligations and expenses incurred but not paid,... false false false false false false false false false 1 false true -144000000 -144 false false 2 false true 48000000 48 false false The net change during the reporting period in the aggregate amount of obligations and expenses incurred but not paid, excluding interest payable. No authoritative reference available. false 22 Increase in derivative assets and liabilities 5 us-gaap_IncreaseDecreaseInCommodityContractAssetsAndLiabilities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -1000000 -1 false false 2 false true -131000000 -131 false false No definition available. No authoritative reference available. false 23 Other operating - assets 5 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -2000000 -2 false false 2 false true -33000000 -33 false false No definition available. No authoritative reference available. false 24 Other operating - liabilities 5 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 72000000 72 false false 2 false true 5000000 5 false false No definition available. No authoritative reference available. false 25 Operating cash flow from continuing operations 3 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -91000000 -91 false false 2 false true -106000000 -106 false false No definition available. No authoritative reference available. true 26 Operating cash flow from discontinued operations 3 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -4000000 -4 false false 2 false true -6000000 -6 false false No definition available. No authoritative reference available. false 27 Net cash used in operating activities 3 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -95000000 -95 false false 2 false true -112000000 -112 false false No definition available. No authoritative reference available. true 28 Cash Flows From Financing Activities: 2 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 29 Borrowings on long-term debt 3 us-gaap_ProceedsFromIssuanceOfLongTermDebt us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 189000000 189 false false 2 false true 182000000 182 false false No definition available. No authoritative reference available. false 30 Payments on long-term debt agreements 3 us-gaap_RepaymentsOfLongTermDebt us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -43000000 -43 false false 2 false true -133000000 -133 false false No definition available. No authoritative reference available. false 31 Cash contributions from noncontrolling interests 3 us-gaap_ProceedsFromMinorityShareholders us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1000000 1 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 32 Cash dividends to noncontrolling interests 3 us-gaap_PaymentsOfDividendsMinorityInterest us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -1000000 -1 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 33 Payments to affiliates related to stock-based awards 3 eme_PaymentsToAffiliatesShareBasedCompensation eme false credit duration monetary Represents cash used by parent company to settle stock options exercised by employees of affiliates. false false false false false false false false false 1 false true -1000000 -1 false false 2 false true -8000000 -8 false false Represents cash used by parent company to settle stock options exercised by employees of affiliates. No authoritative reference available. false 34 Excess tax benefits related to stock-based awards 3 us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false true 1000000 1 false false No definition available. No authoritative reference available. false 35 Financing costs 3 us-gaap_PaymentsOfFinancingCosts us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -13000000 -13 false false 2 false true -1000000 -1 false false No definition available. No authoritative reference available. false 36 Net cash provided by financing activities 3 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 132000000 132 false false 2 false true 41000000 41 false false No definition available. No authoritative reference available. true 37 Cash Flows From Investing Activities 2 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 38 Capital expenditures 3 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -138000000 -138 false false 2 false true -214000000 -214 false false No definition available. No authoritative reference available. false 39 Proceeds from return of capital and loan repayments and sale of assets 3 eme_ProceedsFromReturnOfCapitalLoanRepaymentsAndSaleOfAssets eme false debit duration monetary Proceeds from Return of Capital and Loan Repayments (includes distributions received from unconsolidated subsidiaries that... false false false false false false false false false 1 false true 11000000 11 false false 2 false true 7000000 7 false false Proceeds from Return of Capital and Loan Repayments (includes distributions received from unconsolidated subsidiaries that constitute a return of investment or loan repayment) and sale of assets (cash inflow from sale of other property, plant and equipment used to produce goods or deliver services, and not otherwise defined in taxonomy) No authoritative reference available. false 40 Proceeds from sale of membership interest 3 eme_ProceedsFromSaleOfMembershipInterest eme false debit duration monetary Proceeds From Sale Of Membership Interest false false false false false false false false false 1 false false 0 0 false false 2 false true 28000000 28 false false Proceeds From Sale Of Membership Interest No authoritative reference available. false 41 Purchase of interest of acquired companies 3 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -7000000 -7 false false 2 false true -7000000 -7 false false No definition available. No authoritative reference available. false 42 Maturities of short-term investments 3 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 2000000 2 false false 2 false true 70000000 70 false false No definition available. No authoritative reference available. false 43 Increase in restricted cash 3 us-gaap_IncreaseDecreaseInRestrictedCash us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -1000000 -1 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 44 Investments in other assets 3 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -55000000 -55 false false 2 false true -222000000 -222 false false No definition available. No authoritative reference available. false 45 Net cash used in investing activities 3 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -188000000 -188 false false 2 false true -338000000 -338 false false No definition available. No authoritative reference available. true 46 Net decrease in cash and cash equivalents 2 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -151000000 -151 false false 2 false true -409000000 -409 false false No definition available. No authoritative reference available. true 47 Cash and cash equivalents at beginning of period 2 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false true 1807000000 1807 false false 2 false true 994000000 994 false false No definition available. No authoritative reference available. false 48 Cash and cash equivalents at end of period 2 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 true true 1656000000 1656 false false 2 true true 585000000 585 false false No definition available. No authoritative reference available. false false 2 45 false Millions UnKnown UnKnown false true