1.0.0.3 true CONSOLIDATED STATEMENTS OF TOTAL EQUITY (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 2 Beginning Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false true false false 1 true true 2764000000 2764 false false 2 true true 1965000000 1965 false false 3 true true 2629000000 2629 false false No definition available. No authoritative reference available. false 3 Net income (loss) 2 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 194000000 194 false false 2 false true 501000000 501 false false 3 false true 413000000 413 false false No definition available. No authoritative reference available. false 4 Impact of accounting for uncertainty in income taxes 2 us-gaap_CumulativeEffectOfInitialAdoptionOfFIN48 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 -1000000 -1 false false No definition available. No authoritative reference available. false 5 Other comprehensive income (loss) 2 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -122000000 -122 false false 2 false true 263000000 263 false false 3 false true -164000000 -164 false false No definition available. No authoritative reference available. false 6 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 7 Cash dividends to parent 2 us-gaap_DividendsCommonStockCash 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 -925000000 -925 false false No definition available. No authoritative reference available. false 8 Payments to Edison International for stock purchases related to stock-based compensation 2 eme_PaymentsToParentForStockPurchasesRelatedToStockBasedCompensation eme false debit duration monetary Represents adjustments to retained earnings due to payments made to parent for stock purchases, related to stock-based... 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 true -34000000 -34 false false Represents adjustments to retained earnings due to payments made to parent for stock purchases, related to stock-based compensation. No authoritative reference available. false 9 Excess tax benefits related to stock-option exercises 2 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 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 3000000 3 false false 3 false true 11000000 11 false false No definition available. No authoritative reference available. false 10 Other stock transactions, net 2 us-gaap_StockholdersEquityOther 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 3 false true 4000000 4 false false No definition available. No authoritative reference available. false 11 Sale of membership interest in noncontrolling interests 2 us-gaap_MinorityInterestIncreaseFromStockIssuance 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 28000000 28 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 12 Cash contributions from noncontrolling interests 2 eme_CashContributionsFromNoncontrollingInterests eme false credit duration monetary The amount contributed by noncontrolling shareholders. 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 true 1000000 1 false false The amount contributed by noncontrolling shareholders. No authoritative reference available. false 13 Cash distributions to noncontrolling interests and other 2 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders 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 -2000000 -2 false false 3 false true -5000000 -5 false false No definition available. No authoritative reference available. false 14 Ending Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false true false 1 false true 2837000000 2837 false false 2 false true 2764000000 2764 false false 3 false true 1965000000 1965 false false No definition available. No authoritative reference available. false 15 Common Stock 0 na true na na na No definition available. false true false false false false 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. No authoritative reference available. false 16 Beginning Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false true false false 1 false true 64000000 64 false false 2 false true 64000000 64 false false 3 false true 64000000 64 false false No definition available. No authoritative reference available. false 28 Ending Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false true false 1 false true 64000000 64 false false 2 false true 64000000 64 false false 3 false true 64000000 64 false false No definition available. No authoritative reference available. false 29 Additional Paid-in Capital 0 na true na na na No definition available. false true false false false false 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. No authoritative reference available. false 30 Beginning Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false true false false 1 false true 1335000000 1335 false false 2 false true 1326000000 1326 false false 3 false true 2174000000 2174 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_DividendsCommonStockCash 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 -899000000 -899 false false No definition available. No authoritative reference available. false 37 Excess tax benefits related to stock-option exercises 2 us-gaap_AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation 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 3000000 3 false false 3 false true 11000000 11 false false No definition available. No authoritative reference available. false 38 Other stock transactions, net 2 us-gaap_StockholdersEquityOther 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 3 false true 4000000 4 false false No definition available. No authoritative reference available. false 42 Ending Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false true false 1 false true 1339000000 1339 false false 2 false true 1335000000 1335 false false 3 false true 1326000000 1326 false false No definition available. No authoritative reference available. false 43 Retained Earnings (Accumulated Deficit) 0 na true na na na No definition available. false true false false false false 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. No authoritative reference available. false 44 Beginning Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false true false false 1 false true 1085000000 1085 false false 2 false true 596000000 596 false false 3 false true 243000000 243 false false No definition available. No authoritative reference available. false 45 Net income (loss) 2 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 197000000 197 false false 2 false true 501000000 501 false false 3 false true 414000000 414 false false No definition available. No authoritative reference available. false 46 Impact of accounting for uncertainty in income taxes 2 us-gaap_CumulativeEffectOfInitialAdoptionOfFIN48 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 -1000000 -1 false false No definition available. No authoritative reference available. false 49 Cash dividends to parent 2 us-gaap_DividendsCommonStockCash 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 -26000000 -26 false false No definition available. No authoritative reference available. false 50 Payments to Edison International for stock purchases related to stock-based compensation 2 eme_PaymentsToParentForStockPurchasesRelatedToStockBasedCompensation eme false debit duration monetary Represents adjustments to retained earnings due to payments made to parent for stock purchases, related to stock-based... 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 true -34000000 -34 false false Represents adjustments to retained earnings due to payments made to parent for stock purchases, related to stock-based compensation. No authoritative reference available. false 56 Ending Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false true false 1 false true 1280000000 1280 false false 2 false true 1085000000 1085 false false 3 false true 596000000 596 false false No definition available. No authoritative reference available. false 57 Accumulated Other Comprehensive Income (Loss) 0 na true na na na No definition available. false true false false false false 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. No authoritative reference available. false 58 Beginning Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false true false false 1 false true 200000000 200 false false 2 false true -63000000 -63 false false 3 false true 101000000 101 false false No definition available. No authoritative reference available. false 61 Other comprehensive income (loss) 2 us-gaap_OtherComprehensiveIncomeLossNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true -122000000 -122 false false 2 false true 263000000 263 false false 3 false true -164000000 -164 false false No definition available. No authoritative reference available. false 70 Ending Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false true false 1 false true 78000000 78 false false 2 false true 200000000 200 false false 3 false true -63000000 -63 false false No definition available. No authoritative reference available. false 71 Non-controlling Interests 0 na true na na na No definition available. false true false false false false 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. No authoritative reference available. false 72 Beginning Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false true false false 1 false true 80000000 80 false false 2 false true 42000000 42 false false 3 false true 47000000 47 false false No definition available. No authoritative reference available. false 73 Net income (loss) 2 us-gaap_ProfitLoss 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 true -1000000 -1 false false No definition available. No authoritative reference available. false 81 Sale of membership interest in noncontrolling interests 2 us-gaap_MinorityInterestIncreaseFromStockIssuance 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 28000000 28 false false 3 false false 0 0 false false No definition available. No authoritative reference available. false 82 Cash contributions from noncontrolling interests 2 eme_CashContributionsFromNoncontrollingInterests eme false credit duration monetary The amount contributed by noncontrolling shareholders. 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 true 1000000 1 false false The amount contributed by noncontrolling shareholders. No authoritative reference available. false 83 Cash distributions to noncontrolling interests and other 2 us-gaap_MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders 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 -2000000 -2 false false 3 false true -5000000 -5 false false No definition available. No authoritative reference available. false 84 Ending Balance 2 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false false false false false true false 1 true true 76000000 76 false false 2 true true 80000000 80 false false 3 true true 42000000 42 false false No definition available. No authoritative reference available. false false 3 41 false Millions UnKnown UnKnown false true