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 false 3 $ false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 3 Cash Flows From Operating Activities 1 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 3 false false 0 0 false false No definition available. false 4 Net income 2 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 194000000 194 false false 2 true true 501000000 501 false false 3 true true 413000000 413 false false No definition available. No authoritative reference available. false 5 (Income) loss from discontinued operations 2 us-gaap_IncomeLossFromDiscontinuedOperationsNetOfTax 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 -1000000 -1 false false 3 false true 2000000 2 false false No definition available. No authoritative reference available. false 6 Income from continuing operations, net 2 us-gaap_IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 201000000 201 false false 2 false true 500000000 500 false false 3 false true 415000000 415 false false No definition available. No authoritative reference available. false 7 Adjustments to reconcile income to net cash provided by operating activities: 2 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 3 false false 0 0 false false No definition available. false 8 Equity in income from unconsolidated affiliates 3 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 -100000000 -100 false false 2 false true -121000000 -121 false false 3 false true -199000000 -199 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 9 Distributions from unconsolidated affiliates 3 us-gaap_EquityMethodInvestmentDividendsOrDistributions us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 76000000 76 false false 2 false true 108000000 108 false false 3 false true 137000000 137 false false No definition available. No authoritative reference available. false 10 Depreciation and amortization 3 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 246000000 246 false false 2 false true 202000000 202 false false 3 false true 172000000 172 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 11 Deferred taxes and tax credits 3 us-gaap_DeferredIncomeTaxesAndTaxCredits us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 275000000 275 false false 2 false true 104000000 104 false false 3 false true 41000000 41 false false No definition available. No authoritative reference available. false 12 Gain on buyout of contract, loss on termination of contract, asset write-down and other charges and credits 3 eme_GainLossOnContractTerminationAssetImpairmentAndOtherChargesCreditsNet eme false credit duration monetary This element represents the income received from or payment made to a third party in connection with the termination of a... false false false false false false false false false 1 false true 4000000 4 false false 2 false true 14000000 14 false false 3 false true 1000000 1 false false This element represents the income received from or payment made to a third party in connection with the termination of a contract between the parties. The termination may be due to many causes including early termination of a lease by a lessee, a breach of contract by one or the other party, a failure to perform. This element also includes charges against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value, and various other charges and credits not specifically identified in the taxonomy. No authoritative reference available. false 13 Loss on early extinguishment of debt 3 us-gaap_GainsLossesOnExtinguishmentOfDebt 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 false 0 0 false false 3 false true 160000000 160 false false No definition available. No authoritative reference available. false 14 Changes in operating assets and liabilities: 2 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 3 false false 0 0 false false No definition available. false 15 (Increase) decrease in margin and collateral deposits 3 us-gaap_IncreaseDecreaseInMarginDepositsOutstanding us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -32000000 -32 false false 2 false true -3000000 -3 false false 3 false true 69000000 69 false false No definition available. No authoritative reference available. false 16 Increase in accounts receivables 3 us-gaap_IncreaseDecreaseInReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -35000000 -35 false false 2 false true -1000000 -1 false false 3 false true -29000000 -29 false false No definition available. No authoritative reference available. false 17 (Increase) decrease in inventory 3 us-gaap_IncreaseDecreaseInInventories us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -8000000 -8 false false 2 false true -40000000 -40 false false 3 false true 9000000 9 false false No definition available. No authoritative reference available. false 18 Decrease (increase) in prepaid expenses and other 3 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 53000000 53 false false 2 false true -9000000 -9 false false 3 false true 6000000 6 false false No definition available. No authoritative reference available. false 19 Increase in restricted cash 3 us-gaap_IncreaseDecreaseInRestrictedCashForOperatingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -69000000 -69 false false 2 false false 0 0 false false 3 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 3 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 -160000000 -160 false false 2 false true -162000000 -162 false false 3 false true -160000000 -160 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 (Decrease) increase in accounts payable and other current liabilities 3 us-gaap_IncreaseDecreaseInAccountsPayableAndAccruedLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -109000000 -109 false false 2 false true -7000000 -7 false false 3 false true 6000000 6 false false No definition available. No authoritative reference available. false 22 Increase in interest payable 3 us-gaap_IncreaseDecreaseInInterestPayableNet 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 false 0 0 false false 3 false true 2000000 2 false false No definition available. No authoritative reference available. false 23 (Increase) decrease in derivative assets and liabilities 3 us-gaap_IncreaseDecreaseInCommodityContractAssetsAndLiabilities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -168000000 -168 false false 2 false true 215000000 215 false false 3 false true -106000000 -106 false false No definition available. No authoritative reference available. false 24 Other operating-assets 3 us-gaap_IncreaseDecreaseInOtherOperatingAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 16000000 16 false false 2 false true -53000000 -53 false false 3 false true -18000000 -18 false false No definition available. No authoritative reference available. false 25 Other operating-liabilities 3 us-gaap_IncreaseDecreaseInOtherOperatingLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 68000000 68 false false 2 false true -19000000 -19 false false 3 false true 13000000 13 false false No definition available. No authoritative reference available. false 26 Operating cash flow from continuing operations 2 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 258000000 258 false false 2 false true 728000000 728 false false 3 false true 519000000 519 false false No definition available. No authoritative reference available. true 27 Operating cash flow from discontinued operations 2 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -7000000 -7 false false 2 false true 1000000 1 false false 3 false true -2000000 -2 false false No definition available. No authoritative reference available. false 28 Net cash provided by operating activities 2 us-gaap_NetCashProvidedByUsedInOperatingActivities us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 251000000 251 false false 2 false true 729000000 729 false false 3 false true 517000000 517 false false No definition available. No authoritative reference available. true 29 Cash Flows From Financing Activities 1 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 3 false false 0 0 false false No definition available. false 30 Borrowings on long-term debt 2 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 3 false true 2930000000 2930 false false No definition available. No authoritative reference available. false 31 Payments on long-term debt agreements 2 us-gaap_RepaymentsOfLongTermDebt us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -886000000 -886 false false 2 false true -292000000 -292 false false 3 false true -2276000000 -2276 false false No definition available. No authoritative reference available. false 32 Cash contributions from noncontrolling interests 2 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 true 12000000 12 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 33 Cash dividends to noncontrolling interests 2 us-gaap_PaymentsOfDividendsMinorityInterest 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 false 0 0 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 34 Cash contribution from parent 2 us-gaap_ProceedsFromContributionsFromParent 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 false 0 0 false false 3 false true 36000000 36 false false No definition available. No authoritative reference available. false 35 Cash dividends to parent 2 us-gaap_PaymentsOfDividendsCommonStock 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 false 0 0 false false 3 false true -925000000 -925 false false No definition available. No authoritative reference available. false 36 Payments to affiliates related to stock-based awards 2 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 -8000000 -8 false false 3 false true -34000000 -34 false false Represents cash used by parent company to settle stock options exercised by employees of affiliates. No authoritative reference available. false 37 Excess tax benefits related to stock-based awards 2 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 3000000 3 false false 3 false true 14000000 14 false false No definition available. No authoritative reference available. false 38 Premium paid on extinguishment of debt and financing costs 2 eme_PremiumPaidOnExtinguishmentOfDebtAndFinancingCosts eme false credit duration monetary Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time... false false false false false false false false false 1 false true -14000000 -14 false false 2 false true -1000000 -1 false false 3 false true -162000000 -162 false false Amount represents the difference between the fair value of the payments made and the carrying amount of the debt at the time of its extinguishment, and the write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt. No authoritative reference available. false 39 Net cash provided by (used in) financing activities 2 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -714000000 -714 false false 2 false true 844000000 844 false false 3 false true -417000000 -417 false false No definition available. No authoritative reference available. true 40 Cash Flows From Investing Activities 1 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 3 false false 0 0 false false No definition available. false 41 Capital expenditures 2 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -283000000 -283 false false 2 false true -552000000 -552 false false 3 false true -540000000 -540 false false No definition available. No authoritative reference available. false 42 Proceeds from return of capital and loan repayments and sale of assets 2 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 30000000 30 false false 2 false true 39000000 39 false false 3 false true 32000000 32 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 43 Proceeds from sale of membership interest 2 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 3 false false 0 0 false false Proceeds From Sale Of Membership Interest No authoritative reference available. false 44 Purchase of interest of acquired companies 2 us-gaap_PaymentsToAcquireInterestInSubsidiariesAndAffiliates us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -22000000 -22 false false 2 false true -19000000 -19 false false 3 false true -33000000 -33 false false No definition available. No authoritative reference available. false 45 Purchase of short-term investments 2 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 3 false true -20000000 -20 false false No definition available. No authoritative reference available. false 46 Maturities of short-term investments 2 us-gaap_ProceedsFromMaturitiesPrepaymentsAndCallsOfHeldToMaturitySecurities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 3000000 3 false false 2 false true 96000000 96 false false 3 false true 497000000 497 false false No definition available. No authoritative reference available. false 47 Decrease in restricted deposits 2 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 3 false true 43000000 43 false false No definition available. No authoritative reference available. false 48 Investments in other assets 2 us-gaap_PaymentsForProceedsFromOtherInvestingActivities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -279000000 -279 false false 2 false true -337000000 -337 false false 3 false true -298000000 -298 false false No definition available. No authoritative reference available. false 49 Net cash used in investing activities 2 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -548000000 -548 false false 2 false true -760000000 -760 false false 3 false true -319000000 -319 false false No definition available. No authoritative reference available. true 50 Net increase (decrease) in cash and cash equivalents 1 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -1011000000 -1011 false false 2 false true 813000000 813 false false 3 false true -219000000 -219 false false No definition available. No authoritative reference available. true 51 Cash and cash equivalents at beginning of period 1 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 3 false true 1213000000 1213 false false No definition available. No authoritative reference available. false 52 Cash and cash equivalents at end of period 1 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 true true 796000000 796 false false 2 true true 1807000000 1807 false false 3 true true 994000000 994 false false No definition available. No authoritative reference available. false false 3 50 false Millions UnKnown UnKnown false true