Company:  MORGAN STANLEY INSTITUTIO ... (EMAPX)
Form Type:  485BPOS
Filing Date:  10/22/2019 
CIK:  0000836487 
Address:  522 FIFTH AVENUE 
City, State, Zip:  NEW YORK, New York 10036 
Telephone:  800-548-7786 
Fiscal Year:  12/31 
Register and access this filing in:     
  FORM 485BPOS
    Investment Objective
    Fees and Expenses
      SHAREHOLDER FEES
      OPERATING EXPENSES
    Principal Investment Strategies
    Principal Risks
    Performance Information
      FUND PERFORMANCE
    Fund Management
    Adviser. Morgan Stanley Investment Management Inc.
    Managing Fund
    Investment Objective
    Additional Information About the Fund's Investment ...
    Additional Information About the Fund's Investment ...
    Additional Information About the Fund's Investment ...
    Additional Information About the Fund's Investment ...
    Additional Information About the Fund's Investment ...
    Fund Management
    Portfolio Management
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information
    About Net Asset Value
    Pricing of Fund Shares
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Frequent Purchases and Redemptions of Shares
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Dividends and Distributions
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Shareholder Information (Con't)
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
    Financial Highlights
    Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      FINANCIAL HIGHLIGHTS TABLE
    Where to Find Additional Information
    Statement of Additional Information
      INVESTMENT POLICIES AND STRATEGIES
      PURCHASE AND REDEMPTION OF SHARES
      Valuation of Shares
      MANAGEMENT OF THE COMPANY
      Directors and Officers
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        TRUSTEE OWNERSHIP
        COMPENSATION TABLE
      Code of Ethics
      INVESTMENT ADVISORY AND OTHER SERVICES
      Securities Ownership of Portfolio Managers
        TRUSTEE OWNERSHIP
      Portfolio Transactions
      Dividends and Capital Gains Distributions
      CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
      PERFORMANCE INFORMATION
      FINANCIAL STATEMENTS
      APPENDIX A - MORGAN STANLEY INVESTMENT MANAGEMENT PROXY ...
      B. Board of Directors.
    APPENDIX A
      Investment Objective
      Fees and Expenses
        SHAREHOLDER FEES
        OPERATING EXPENSES
      Principal Investment Strategies
      Principal Risks
      Performance Information
        FUND PERFORMANCE
      Fund Management
      Adviser. Morgan Stanley Investment Management Inc.
      Managing Fund
      Investment Objective
      Additional Information About the Fund's Investment ...
      Additional Information About the Fund's Investment ...
      Additional Information About the Fund's Investment ...
      Additional Information About the Fund's Investment ...
      Additional Information About the Fund's Investment ...
      Fund Management
      Portfolio Management
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information
      About Net Asset Value
      Pricing of Fund Shares
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Frequent Purchases and Redemptions of Shares
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Dividends and Distributions
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Shareholder Information (Con't)
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
      Financial Highlights
      Morgan Stanley Institutional Fund, Inc. Prospectus | ...
        FINANCIAL HIGHLIGHTS TABLE
      Where to Find Additional Information
    Statement of Additional Information
      INVESTMENT POLICIES AND STRATEGIES
      PURCHASE AND REDEMPTION OF SHARES
      Valuation of Shares
      MANAGEMENT OF THE COMPANY
      Directors and Officers
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        NAME AND TITLE
        TRUSTEE OWNERSHIP
        COMPENSATION TABLE
      Code of Ethics
      INVESTMENT ADVISORY AND OTHER SERVICES
      Securities Ownership of Portfolio Managers
        TRUSTEE OWNERSHIP
      Portfolio Transactions
      Dividends and Capital Gains Distributions
      CONTROL PERSONS AND PRINCIPAL HOLDERS OF SECURITIES
      PERFORMANCE INFORMATION
      FINANCIAL STATEMENTS
      APPENDIX A - MORGAN STANLEY INVESTMENT MANAGEMENT PROXY ...
      B. Board of Directors.
    APPENDIX A
    PART C
      ITEM 28. Exhibits
      ITEM 29. Persons Controlled by or Under Common Control with ...
      ITEM 30. Indemnification
      ITEM 31. Business and Other Connections of Investment Adviser
        NAME AND TITLE
      ITEM 32. Principal Underwriters
        NAME AND TITLE
      ITEM 33. Location of Accounts and Records
      ITEM 34. Management Services
      ITEM 35. Undertakings
    SIGNATURES
    EXHIBIT INDEX
  EXHIBIT 99.(I)(73)
  EXHIBIT 99.(I)(74)
  EXHIBIT 99.(J)