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 5 Cash Flows From Operating Activities 3 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 6 Net income 4 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 147000000 147 false false 2 true true 425000000 425 false false No definition available. No authoritative reference available. false 7 Loss from discontinued operations 4 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 5000000 5 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 8 Income from continuing operations, net 4 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 152000000 152 false false 2 false true 425000000 425 false false No definition available. No authoritative reference available. false 9 Adjustments to reconcile income to net cash provided by operating activities: 4 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 10 Equity in income from unconsolidated affiliates 5 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -86000000 -86 false false 2 false true -123000000 -123 false false No definition available. No authoritative reference available. false 11 Distributions from unconsolidated affiliates 5 us-gaap_EquityMethodInvestmentDividendsOrDistributions us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 46000000 46 false false 2 false true 85000000 85 false false No definition available. No authoritative reference available. false 12 Depreciation and amortization 5 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 180000000 180 false false 2 false true 146000000 146 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 13 Deferred taxes and tax credits 5 us-gaap_DeferredIncomeTaxesAndTaxCredits us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 314000000 314 false false 2 false true 79000000 79 false false No definition available. No authoritative reference available. false 14 (Gain) on buyout of contract and (gain) loss on sale of assets 5 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 15 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 16 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 -118000000 -118 false false 2 false true -63000000 -63 false false No definition available. No authoritative reference available. false 17 Increase in accounts receivables 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 -70000000 -70 false false 2 false true -11000000 -11 false false No definition available. No authoritative reference available. false 18 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 -28000000 -28 false false 2 false true -14000000 -14 false false No definition available. No authoritative reference available. false 19 (Increase) 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 39000000 39 false false 2 false true -5000000 -5 false false No definition available. No authoritative reference available. false 20 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 -148000000 -148 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 21 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 -161000000 -161 false false 2 false true -162000000 -162 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 22 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 -130000000 -130 false false 2 false true -1000000 -1 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 23 Increase in interest payable 5 us-gaap_IncreaseDecreaseInInterestPayableNet us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 71000000 71 false false 2 false true 69000000 69 false false No definition available. No authoritative reference available. false 24 (Increase) decrease 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 -55000000 -55 false false 2 false true 32000000 32 false false No definition available. No authoritative reference available. false 25 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 11000000 11 false false 2 false true -35000000 -35 false false No definition available. No authoritative reference available. false 26 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 69000000 69 false false 2 false true -4000000 -4 false false No definition available. No authoritative reference available. false 27 Operating cash flow from continuing operations 4 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 87000000 87 false false 2 false true 402000000 402 false false No definition available. No authoritative reference available. true 28 Operating cash flow from discontinued operations 4 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -5000000 -5 false false 2 false false 0 0 false false No definition available. No authoritative reference available. false 29 Net cash provided by operating activities 4 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 82000000 82 false false 2 false true 402000000 402 false false No definition available. No authoritative reference available. true 30 Cash Flows From Financing Activities 3 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 31 Borrowings on long-term debt 4 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 1130000000 1130 false false No definition available. No authoritative reference available. false 32 Payments on long-term debt agreements 4 us-gaap_RepaymentsOfLongTermDebt us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -409000000 -409 false false 2 false true -243000000 -243 false false No definition available. No authoritative reference available. false 33 Cash contributions from noncontrolling interests 4 us-gaap_ProceedsFromMinorityShareholders 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 false 0 0 false false No definition available. No authoritative reference available. false 34 Cash dividends to noncontrolling interests 4 us-gaap_PaymentsOfDividendsMinorityInterest 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 false 0 0 false false No definition available. No authoritative reference available. false 35 Payments to affiliates related to stock-based awards 4 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 -2000000 -2 false false 2 false true -7000000 -7 false false Represents cash used by parent company to settle stock options exercised by employees of affiliates. No authoritative reference available. false 36 Excess tax benefits related to stock-based awards 4 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 2000000 2 false false No definition available. No authoritative reference available. false 37 Financing costs 4 us-gaap_PaymentsOfFinancingCosts us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -14000000 -14 false false 2 false true -1000000 -1 false false No definition available. No authoritative reference available. false 38 Net cash provided by (used in) financing activities 4 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -236000000 -236 false false 2 false true 881000000 881 false false No definition available. No authoritative reference available. true 39 Cash Flows From Investing Activities 3 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 40 Capital expenditures 4 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -177000000 -177 false false 2 false true -316000000 -316 false false No definition available. No authoritative reference available. false 41 Proceeds from return of capital and loan repayments and sale of assets 4 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 9000000 9 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 42 Proceeds from sale of membership interest 4 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 43 Purchase of interest of acquired companies 4 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 -11000000 -11 false false No definition available. No authoritative reference available. false 44 Purchase of short-term investments 4 us-gaap_PaymentsToAcquireHeldToMaturitySecurities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 false false 2 false true -19000000 -19 false false No definition available. No authoritative reference available. false 45 Maturities of short-term investments 4 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 80000000 80 false false No definition available. No authoritative reference available. false 46 Decrease in restricted deposits 4 us-gaap_IncreaseDecreaseInRestrictedCash us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 3000000 3 false false 2 false true 4000000 4 false false No definition available. No authoritative reference available. false 47 Investments in other assets 4 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -277000000 -277 false false 2 false true -307000000 -307 false false No definition available. No authoritative reference available. false 48 Net cash used in investing activities 4 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -445000000 -445 false false 2 false true -532000000 -532 false false No definition available. No authoritative reference available. true 49 Net increase (decrease) in cash and cash equivalents 3 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -599000000 -599 false false 2 false true 751000000 751 false false No definition available. No authoritative reference available. true 50 Cash and cash equivalents at beginning of period 3 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 51 Cash and cash equivalents at end of period 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 true true 1208000000 1208 false false 2 true true 1745000000 1745 false false No definition available. No authoritative reference available. false false 2 47 false Millions UnKnown UnKnown false true