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1.0.0.3 true Statement Of Shareholders Equity And Other Comprehensive Income (USD $) In Millions false 1 $ true false false false Preferred Stock us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_PreferredStockMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ true false false false Common Stock us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_CommonStockMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 3 $ true false false false Paid-in Capital us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AdditionalPaidInCapitalMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 4 $ true false false false Retained Earnings us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_RetainedEarningsMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 5 $ true false false false Employee Stock Trust us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_TrustForBenefitOfEmployeesMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 6 $ true false false false Accumulated Other Comprehensive Income (Loss) us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_AccumulatedOtherComprehensiveIncomeMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 7 $ true false false false Common Stock Held in Treasury at Cost us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_TreasuryStockMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 8 $ true false false false Common Stock Issued to Employee Trust us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi ms_CommonStockIssuedToEmployeeTrustMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 9 $ true false false false Non- controlling Interests us-gaap_StatementEquityComponentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_NoncontrollingInterestMember us-gaap_StatementEquityComponentsAxis explicitMember iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 10 $ false false iso4217_USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 iso4217_USD_per_shares Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares 0 shares Standard http://www.xbrl.org/2003/instance shares 0 5 BEGINNING BALANCE at Nov. 30, 2006 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false true false false 1 true true 1100000000 1100 true false 2 true true 12000000 12 true false 3 true true 2213000000 2213 true false 4 true true 41422000000 41422 true false 5 true true 4315000000 4315 true false 6 true true -35000000 -35 true false 7 true true -9348000000 -9348 true false 8 true true -4315000000 -4315 true false 9 true true 2620000000 2620 true false 10 true true 37984000000 37984 false false No definition available. No authoritative reference available. false 6 Fair value adjustment 3 us-gaap_IncreaseDecreaseInFairValueOfInterestRateFairValueHedgingInstruments us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true 186000000 186 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 186000000 186 false false No definition available. No authoritative reference available. false 7 Net (loss) income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true 3209000000 3209 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 40000000 40 true false 10 false true 3249000000 3249 false false No definition available. No authoritative reference available. false 8 Dividends 3 us-gaap_DividendsCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -1219000000 -1219 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -57000000 -57 true false 10 false true -1276000000 -1276 false false No definition available. No authoritative reference available. false 9 Shares issued under employee plans and related tax effects 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 420000000 420 true false 4 false true 5000000 5 true false 5 false true 1254000000 1254 true false 6 false false 0 0 true false 7 false true 2857000000 2857 true false 8 false true -1254000000 -1254 true false 9 false false 0 0 true false 10 false true 3282000000 3282 false false No definition available. No authoritative reference available. false 10 Repurchases of common stock 3 us-gaap_StockRepurchasedDuringPeriodValue us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true -4070000000 -4070 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -4070000000 -4070 false false No definition available. No authoritative reference available. false 17 Net change in cash flow hedges 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 19000000 19 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 19000000 19 [3] false false No definition available. No authoritative reference available. false 18 Minimum pension liability adjustment 3 us-gaap_OtherComprehensiveIncomeMinimumPensionLiabilityNetAdjustmentNetOfTax us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -40000000 -40 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -40000000 -40 [2] false false No definition available. No authoritative reference available. false 19 Pension adjustment 3 ms_OtherComprehensiveIncomePensionAdjustment ms false debit duration monetary Other Comprehensive Income, Pension Adjustment. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -208000000 -208 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -208000000 -208 false false Other Comprehensive Income, Pension Adjustment. No authoritative reference available. false 22 Foreign currency translation adjustments 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 65000000 65 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 122000000 122 true false 10 false true 187000000 187 [1] false false No definition available. No authoritative reference available. false 23 MSCI Inc. initial public offering 3 ms_StockIssuedDuringPeriodValueInitialPublicOffering ms false credit duration monetary Value of stock issued during the period from an initial public offering. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 239000000 239 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 239000000 239 false false Value of stock issued during the period from an initial public offering. No authoritative reference available. false 26 Discover Spin-off 3 us-gaap_StockholdersEquityNoteSpinoffTransaction us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -970000000 -970 true false 4 false true -5558000000 -5558 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true 970000000 970 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -5558000000 -5558 false false No definition available. No authoritative reference available. false 29 Issuances of shares by subsidiaries 3 ms_StockIssuedDuringPeriodBySubsidiaryValue ms false debit duration monetary The SAB 51 adjustment to additional paid-in capital resulting from the issuance of new shares of common stock by a... false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 219000000 219 true false 10 false true 219000000 219 false false The SAB 51 adjustment to additional paid-in capital resulting from the issuance of new shares of common stock by a subsidiary. No authoritative reference available. false 31 Acquisitions of subsidiaries 3 us-gaap_StockIssuedDuringPeriodValueAcquisitions us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 741000000 741 true false 10 false true 741000000 741 false false No definition available. No authoritative reference available. false 32 Repurchases of subsidiaries' shares by Morgan Stanley 3 ms_NoncontrollingInterestChangesFromPurchasesOrRedemptions ms false debit duration monetary Decrease in noncontrolling interest and adjustments to Additional Paid In Capital as a result of redeeming or purchasing the... false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -2044000000 -2044 true false 10 false true -2044000000 -2044 false false Decrease in noncontrolling interest and adjustments to Additional Paid In Capital as a result of redeeming or purchasing the interests of noncontrolling shareholders. No authoritative reference available. false 33 Decrease in non-controlling interests related to disposition of a subsidiary 3 us-gaap_MinorityInterestDecreaseFromRedemptions us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -10000000 -10 true false 10 false true -10000000 -10 false false No definition available. No authoritative reference available. false 34 Other 3 us-gaap_StockholdersEquityOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -3000000 -3 true false 10 false true -3000000 -3 false false No definition available. No authoritative reference available. false 36 ENDING BALANCE at Nov. 30, 2007 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 1100000000 1100 true false 2 false true 12000000 12 true false 3 false true 1902000000 1902 true false 4 false true 38045000000 38045 true false 5 false true 5569000000 5569 true false 6 false true -199000000 -199 true false 7 false true -9591000000 -9591 true false 8 false true -5569000000 -5569 true false 9 false true 1628000000 1628 true false 10 false true 32897000000 32897 false false No definition available. No authoritative reference available. false 7 Net (loss) income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true 1707000000 1707 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 71000000 71 true false 10 false true 1778000000 1778 false false No definition available. No authoritative reference available. false 8 Dividends 3 us-gaap_DividendsCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -1227000000 -1227 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -71000000 -71 true false 10 false true -1298000000 -1298 false false No definition available. No authoritative reference available. false 9 Shares issued under employee plans and related tax effects 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -1142000000 -1142 true false 4 false false 0 0 true false 5 false true -1668000000 -1668 true false 6 false false 0 0 true false 7 false true 3493000000 3493 true false 8 false true 1668000000 1668 true false 9 false false 0 0 true false 10 false true 2351000000 2351 false false No definition available. No authoritative reference available. false 10 Repurchases of common stock 3 us-gaap_StockRepurchasedDuringPeriodValue us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true -1828000000 -1828 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -1828000000 -1828 false false No definition available. No authoritative reference available. false 11 Issuance of preferred stock and common stock warrant 3 ms_StockIssuedDuringPeriodValuePreferredStockAndCommonStockWarrants ms false credit duration monetary Stock issued during period value preferred stock and common stock warrants. false false false false false false false false false 1 false true 18055000000 18055 true false 2 false false 0 0 true false 3 false true 957000000 957 true false 4 false true -15000000 -15 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 18997000000 18997 false false Stock issued during period value preferred stock and common stock warrants. No authoritative reference available. false 17 Net change in cash flow hedges 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 16000000 16 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 16000000 16 [3] false false No definition available. No authoritative reference available. false 19 Pension adjustment 3 ms_OtherComprehensiveIncomePensionAdjustment ms false debit duration monetary Other Comprehensive Income, Pension Adjustment. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -15000000 -15 true false 5 false false 0 0 true false 6 false true 2000000 2 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -13000000 -13 false false Other Comprehensive Income, Pension Adjustment. No authoritative reference available. false 20 Pension and postretirement adjustments 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 216000000 216 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 216000000 216 false false No definition available. No authoritative reference available. false 21 Tax adjustment 3 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 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -92000000 -92 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -92000000 -92 false false No definition available. No authoritative reference available. false 22 Foreign currency translation adjustments 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -160000000 -160 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -110000000 -110 true false 10 false true -270000000 -270 [1] false false No definition available. No authoritative reference available. false 24 Equity Units 3 ms_EquityUnits ms false debit duration monetary Equity Units false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -405000000 -405 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -405000000 -405 false false Equity Units No authoritative reference available. false 27 Reclassification of negative additional paid-in capital to retained earnings 3 ms_ReclassificationOfNegativeAPICToRetainedEarnings ms false credit duration monetary Reclassification Of Negative APIC To Retained Earnings false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 307000000 307 true false 4 false true -307000000 -307 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 0 0 false false Reclassification Of Negative APIC To Retained Earnings No authoritative reference available. false 30 Sales of subsidiaries' shares by Morgan Stanley 3 ms_SalesOfSubsidiarySharesByParent ms false credit duration monetary Sales of Subsidiary Shares By Parent false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 132000000 132 true false 10 false true 132000000 132 false false Sales of Subsidiary Shares By Parent No authoritative reference available. false 31 Acquisitions of subsidiaries 3 us-gaap_StockIssuedDuringPeriodValueAcquisitions us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 9000000 9 true false 10 false true 9000000 9 false false No definition available. No authoritative reference available. false 32 Repurchases of subsidiaries' shares by Morgan Stanley 3 ms_NoncontrollingInterestChangesFromPurchasesOrRedemptions ms false debit duration monetary Decrease in noncontrolling interest and adjustments to Additional Paid In Capital as a result of redeeming or purchasing the... false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -445000000 -445 true false 10 false true -445000000 -445 false false Decrease in noncontrolling interest and adjustments to Additional Paid In Capital as a result of redeeming or purchasing the interests of noncontrolling shareholders. No authoritative reference available. false 33 Decrease in non-controlling interests related to disposition of a subsidiary 3 us-gaap_MinorityInterestDecreaseFromRedemptions us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -514000000 -514 true false 10 false true -514000000 -514 false false No definition available. No authoritative reference available. false 34 Other 3 us-gaap_StockholdersEquityOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 5000000 5 true false 10 false true 5000000 5 false false No definition available. No authoritative reference available. false 36 ENDING BALANCE at Nov. 30, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 19155000000 19155 true false 2 false true 12000000 12 true false 3 false true 1619000000 1619 true false 4 false true 38096000000 38096 true false 5 false true 3901000000 3901 true false 6 false true -125000000 -125 true false 7 false true -7926000000 -7926 true false 8 false true -3901000000 -3901 true false 9 false true 705000000 705 true false 10 false true 51536000000 51536 false false No definition available. No authoritative reference available. false 7 Net (loss) income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -1288000000 -1288 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 3000000 3 true false 10 false true -1285000000 -1285 false false No definition available. No authoritative reference available. false 8 Dividends 3 us-gaap_DividendsCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -641000000 -641 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -5000000 -5 true false 10 false true -646000000 -646 false false No definition available. No authoritative reference available. false 9 Shares issued under employee plans and related tax effects 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true -1160000000 -1160 true false 4 false false 0 0 true false 5 false true 411000000 411 true false 6 false false 0 0 true false 7 false true 1309000000 1309 true false 8 false true -411000000 -411 true false 9 false false 0 0 true false 10 false true 149000000 149 false false No definition available. No authoritative reference available. false 10 Repurchases of common stock 3 us-gaap_StockRepurchasedDuringPeriodValue us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true -3000000 -3 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -3000000 -3 false false No definition available. No authoritative reference available. false 13 Preferred stock accretion 3 ms_DiscountAccretionOnPreferredStock ms false credit duration monetary Discount Accretion on Preferred Stock false false false false false false false false false 1 false true 13000000 13 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -13000000 -13 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 0 0 false false Discount Accretion on Preferred Stock No authoritative reference available. false 17 Net change in cash flow hedges 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 2000000 2 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 2000000 2 [3] false false No definition available. No authoritative reference available. false 20 Pension and postretirement adjustments 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -201000000 -201 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -201000000 -201 false false No definition available. No authoritative reference available. false 22 Foreign currency translation adjustments 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -96000000 -96 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -96000000 -96 [1] false false No definition available. No authoritative reference available. false 36 ENDING BALANCE at Dec. 31, 2008 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 false true 19168000000 19168 true false 2 false true 12000000 12 true false 3 false true 459000000 459 true false 4 false true 36154000000 36154 true false 5 false true 4312000000 4312 true false 6 false true -420000000 -420 true false 7 false true -6620000000 -6620 true false 8 false true -4312000000 -4312 true false 9 false true 703000000 703 true false 10 false true 49456000000 49456 false false No definition available. No authoritative reference available. false 7 Net (loss) income 3 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true 1346000000 1346 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 60000000 60 true false 10 false true 1406000000 1406 false false No definition available. No authoritative reference available. false 8 Dividends 3 us-gaap_DividendsCash us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false true -1310000000 -1310 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -23000000 -23 true false 10 false true -1333000000 -1333 false false No definition available. No authoritative reference available. false 9 Shares issued under employee plans and related tax effects 3 us-gaap_StockIssuedDuringPeriodValueEmployeeStockPurchasePlan us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 485000000 485 true false 4 false false 0 0 true false 5 false true -248000000 -248 true false 6 false false 0 0 true false 7 false true 631000000 631 true false 8 false true 248000000 248 true false 9 false false 0 0 true false 10 false true 1116000000 1116 false false No definition available. No authoritative reference available. false 10 Repurchases of common stock 3 us-gaap_StockRepurchasedDuringPeriodValue us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false true -50000000 -50 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -50000000 -50 false false No definition available. No authoritative reference available. false 12 Morgan Stanley public offerings of common stock 3 ms_StockIssuedDuringPeriodValuePublicOffering ms false credit duration monetary Value of stock issued during the period by an entity in a public offering. false false false false false false false false false 1 false false 0 0 true false 2 false true 3000000 3 true false 3 false true 6209000000 6209 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 6212000000 6212 false false Value of stock issued during the period by an entity in a public offering. No authoritative reference available. false 14 Series C Preferred Stock extinguished and exchanged for common stock 3 ms_RedemptionOfPreferredStock ms false debit duration monetary Redemption of preferred stock. false false false false false false false false false 1 false true -503000000 -503 true false 2 false false 0 0 true false 3 false true 705000000 705 true false 4 false true -202000000 -202 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 0 0 false false Redemption of preferred stock. No authoritative reference available. false 15 Series D Preferred Stock and Warrant 3 ms_PreferredStockRepurchasedAndRetiredDuringPeriodValue ms false debit duration monetary Value of preferred stock that has been repurchased and retired during the period. The excess of the purchase price over par... false false false false false false false false false 1 false true -9068000000 -9068 true false 2 false false 0 0 true false 3 false true -950000000 -950 true false 4 false true -932000000 -932 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true -10950000000 -10950 false false Value of preferred stock that has been repurchased and retired during the period. The excess of the purchase price over par value can be charged against retained earnings (once the excess is fully allocated to additional paid in capital). No authoritative reference available. false 16 Gain on Morgan Stanley Smith Barney transaction 3 ms_ContributionsFromAndDistributionsToNoncontrollingInterests ms false credit duration monetary Contributions from and (distributions to) noncontrolling interests. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false true 1711000000 1711 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 1711000000 1711 false false Contributions from and (distributions to) noncontrolling interests. No authoritative reference available. false 17 Net change in cash flow hedges 3 us-gaap_OtherComprehensiveIncomeDerivativesQualifyingAsHedgesNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 13000000 13 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false false 0 0 true false 10 false true 13000000 13 [3] false false No definition available. No authoritative reference available. false 20 Pension and postretirement adjustments 3 us-gaap_OtherComprehensiveIncomeDefinedBenefitPlansAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true -269000000 -269 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -4000000 -4 true false 10 false true -273000000 -273 false false No definition available. No authoritative reference available. false 22 Foreign currency translation adjustments 3 us-gaap_OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false true 116000000 116 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -4000000 -4 true false 10 false true 112000000 112 [1] false false No definition available. No authoritative reference available. false 25 Increase in non-controlling interests related to Morgan Stanley Smith Barney transaction 3 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 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 4825000000 4825 true false 10 false true 4825000000 4825 false false No definition available. No authoritative reference available. false 28 Increase in non-controlling interests related to the consolidation of certain real estate funds sponsored by the Company 3 ms_IncreaseDecreaseInNoncontrollingInterestRelatedToTheConsolidationOfFundsSponsoredByTheParent ms false credit duration monetary Increase Decrease in Noncontrolling Interest Related To The Consolidation Of Funds Sponsored By The Parent false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 724000000 724 true false 10 false true 724000000 724 false false Increase Decrease in Noncontrolling Interest Related To The Consolidation Of Funds Sponsored By The Parent No authoritative reference available. false 33 Decrease in non-controlling interests related to disposition of a subsidiary 3 us-gaap_MinorityInterestDecreaseFromRedemptions us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true -229000000 -229 true false 10 false true -229000000 -229 false false No definition available. No authoritative reference available. false 35 Other increases in non-controlling interests 3 us-gaap_MinorityInterestPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false false 0 0 true false 2 false false 0 0 true false 3 false false 0 0 true false 4 false false 0 0 true false 5 false false 0 0 true false 6 false false 0 0 true false 7 false false 0 0 true false 8 false false 0 0 true false 9 false true 40000000 40 true false 10 false true 40000000 40 false false No definition available. No authoritative reference available. false 36 ENDING BALANCE at Dec. 31, 2009 3 us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest us-gaap true credit instant monetary No definition available. false false false true false false false true false 1 true true 9597000000 9597 true false 2 true true 15000000 15 true false 3 true true 8619000000 8619 true false 4 true true 35056000000 35056 true false 5 true true 4064000000 4064 true false 6 true true -560000000 -560 true false 7 true true -6039000000 -6039 true false 8 true true -4064000000 -4064 true false 9 true true 6092000000 6092 true false 10 true true 52780000000 52780 false false No definition available. No authoritative reference available. false 1 Amounts are net of (benefit from) provision for income taxes of $(335) million, $388 million, $(132) million and $(52) million for 2009, fiscal 2008, fiscal 2007 and the one month ended December 31, 2008, respectively. 2 Amounts are net of income tax benefits of $(16) million for fiscal 2007. 3 Amounts are net of provision for income taxes of $8 million, $11 million, $10 million and $1 million for 2009, fiscal 2008, fiscal 2007 and the one month ended December 31, 2008, respectively. false 10 61 false Millions UnKnown UnKnown false true