0001104659-13-056105.txt : 20130724 0001104659-13-056105.hdr.sgml : 20130724 20130724104159 ACCESSION NUMBER: 0001104659-13-056105 CONFORMED SUBMISSION TYPE: 485BPOS PUBLIC DOCUMENT COUNT: 7 FILED AS OF DATE: 20130724 DATE AS OF CHANGE: 20130724 EFFECTIVENESS DATE: 20130724 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MORGAN STANLEY INSTITUTIONAL FUND INC CENTRAL INDEX KEY: 0000836487 IRS NUMBER: 000000000 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1933 Act SEC FILE NUMBER: 033-23166 FILM NUMBER: 13982830 BUSINESS ADDRESS: STREET 1: 522 FIFTH AVENUE CITY: NEW YORK STATE: NY ZIP: 10036 BUSINESS PHONE: 6175578742 MAIL ADDRESS: STREET 1: 522 FIFTH AVENUE CITY: NEW YORK STATE: NY ZIP: 10036 FORMER COMPANY: FORMER CONFORMED NAME: MORGAN STANLEY DEAN WITTER INSTITUTIONAL FUND INC DATE OF NAME CHANGE: 19990329 FORMER COMPANY: FORMER CONFORMED NAME: MORGAN STANLEY INSTITUTIONAL FUND INC DATE OF NAME CHANGE: 19920703 FILER: COMPANY DATA: COMPANY CONFORMED NAME: MORGAN STANLEY INSTITUTIONAL FUND INC CENTRAL INDEX KEY: 0000836487 IRS NUMBER: 000000000 STATE OF INCORPORATION: MD FISCAL YEAR END: 1231 FILING VALUES: FORM TYPE: 485BPOS SEC ACT: 1940 Act SEC FILE NUMBER: 811-05624 FILM NUMBER: 13982831 BUSINESS ADDRESS: STREET 1: 522 FIFTH AVENUE CITY: NEW YORK STATE: NY ZIP: 10036 BUSINESS PHONE: 6175578742 MAIL ADDRESS: STREET 1: 522 FIFTH AVENUE CITY: NEW YORK STATE: NY ZIP: 10036 FORMER COMPANY: FORMER CONFORMED NAME: MORGAN STANLEY DEAN WITTER INSTITUTIONAL FUND INC DATE OF NAME CHANGE: 19990329 FORMER COMPANY: FORMER CONFORMED NAME: MORGAN STANLEY INSTITUTIONAL FUND INC DATE OF NAME CHANGE: 19920703 0000836487 S000002825 SMALL COMPANY GROWTH PORTFOLIO C000129402 Class IS 485BPOS 1 a13-9669_7485bpos.htm 485BPOS

As filed with the Securities and Exchange Commission on July 24, 2013

1933 Act File No. 033-23166
1940 Act File No. 811-05624

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION

WASHINGTON D. C. 20549

FORM N-1A

  REGISTRATION STATEMENT
  UNDER THE SECURITIES ACT OF 1933  
x

  Pre-Effective Amendment No.  o

  Post-Effective Amendment No. 122  x

  and/or

  REGISTRATION STATEMENT
  UNDER THE INVESTMENT COMPANY ACT OF 1940  
x

  Amendment No. 123  x

Morgan Stanley Institutional Fund, Inc.

(Exact Name of Registrant as Specified in Charter)

522 Fifth Avenue
New York, New York 10036

(Address of Principal Executive Offices)

Registrant's Telephone Number, Including Area Code: (212) 296-6970

Stefanie V. Chang Yu, Esq.
Morgan Stanley Investment Management Inc.
522 Fifth Avenue
New York, New York 10036

(Name and Address of Agent for Service)

Copy To:

Carl Frischling, Esq.
Kramer Levin Naftalis & Frankel LLP
1177 Avenue of the Americas
New York, New York 10036
  Stuart M. Strauss, Esq.
Dechert LLP
1095 Avenue of the Americas
New York, New York 10036
 

It is proposed that this filing will become effective (check appropriate box)

         

X

   

immediately upon filing pursuant to paragraph (b)

 
           

on (date) pursuant to paragraph (b)

 
           

60 days after filing pursuant to paragraph (a) (1)

 
           

on (date) pursuant to paragraph (a) (1)

 
           

75 days after filing pursuant to paragraph (a) (2)

 
           

On (date) pursuant to paragraph (a) (2) of rule 485.

 

  If appropriate, check the following box:

       

this post-effective amendment designates a new effective date for a previously

 
       

filed post-effective

 


EXPLANATORY NOTE

This Post-Effective Amendment No. 122 to the Registration Statement of Morgan Stanley Institutional Fund, Inc. (the "Registrant") on Form N-1A (File No. 033-23166) (the "Amendment") relates only to the Class IS shares of the Small Company Growth Portfolio.

 

This Amendment does not affect the Post-Effective Amendment No. 118 to the Registration Statement of the Registrant filed on June 3, 2013.

 



 

SIGNATURES

 

Pursuant to the requirements of the Securities Act of 1933 and the Investment Company Act of 1940, the Registrant certifies that it meets all of the requirements for effectiveness of this Registration Statement pursuant to Rule 485(b) under the Securities Act of 1933, and has duly caused this Post-Effective Amendment to the Registration Statement to be signed on its behalf by the undersigned, thereunto duly authorized, in the City of New York and State of New York on the 24th day of July, 2013.

 

 

MORGAN STANLEY INSTITUTIONAL FUND, INC.

 

 

 

 

By

/s/ Arthur Lev

 

 

 

Arthur Lev

 

 

 

President and Principal Executive Officer

 

Pursuant to the requirements of the Securities Act of 1933, this Post-Effective Amendment No. 122 has been signed below by the following persons in the capacities and on the dates indicated.

 

Signatures

 

Title

 

Date

 

 

 

 

 

(1) Principal Executive Officer

 

President and Principal Executive Officer

 

 

 

 

 

 

 

By

/s/ Arthur Lev

 

 

 

July 24, 2013

 

Arthur Lev

 

 

 

 

 

 

 

 

 

(2) Principal Financial Officer

 

Principal Financial Officer

 

 

 

 

 

 

 

By

/s/ Francis J. Smith

 

 

 

July 24, 2013

 

Francis J. Smith

 

 

 

 

 

 

 

 

 

(3) Majority of the Directors

 

 

 

 

 

 

 

 

 

 

James F. Higgins

 

 

 

 

 

 

 

 

 

 

By:

/s/ Stefanie V. Chang Yu

 

 

 

July 24, 2013

 

Stefanie V. Chang Yu

 

 

 

 

 

Attorney-in-Fact

 

 

 

 

 

 

 

 

 

 

 

Frank L. Bowman

Michael F. Klein

 

 

 

 

Michael Bozic

Michael E. Nugent (Chairman)

 

 

 

 

Kathleen A. Dennis

W. Allen Reed

 

 

 

 

Manuel H. Johnson

Fergus Reid

 

 

 

 

Joseph J. Kearns

 

 

 

 

 

 

 

 

 

By:

/s/ Carl Frischling

 

 

 

July 24, 2013

 

Carl Frischling

 

 

 

 

 

Attorney-in-Fact

 

 

 

 

 



 

EXHIBIT INDEX

 

Index No.

 

Description of Exhibit

 

 

 

EX-101.INS

 

XBRL Instance Document

EX-101.SCH

 

XBRL Taxonomy Extension Schema Document

EX-101.CAL

 

XBRL Taxonomy Extension Calculation Linkbase

EX-101.DEF

 

XBRL Taxonomy Extension Definition Linkbase

EX-101.LAB

 

XBRL Taxonomy Extension Labels Linkbase

EX-101.PRE

 

XBRL Taxonomy Extension Presentation Linkbase

 

EX-101.INS 2 ck0000836487-20130712.xml XBRL INSTANCE DOCUMENT 0000836487 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member ck0000836487:C000129402Member 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member ck0000836487:C000007744Member 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member rr:AfterTaxesOnDistributionsMember ck0000836487:C000007744Member 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member rr:AfterTaxesOnDistributionsAndSalesMember ck0000836487:C000007744Member 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member ck0000836487:index_Russell_2000174_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMember 2012-12-31 2012-12-31 0000836487 ck0000836487:S000002825Member ck0000836487:index_Lipper_SmallCap_Growth_Funds_Index_reflects_no_deduction_for_taxesMember 2012-12-31 2012-12-31 xbrli:pure iso4217:USD Class I shares are not offered in this Prospectus. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Class IS shares would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. The returns for Class IS shares are expected to be higher than the returns for Class I shares of the Portfolio as expenses of Class IS are estimated to be lower. Return information for the Portfolio's Class IS shares will be shown in future prospectuses offering the Portfolio's Class IS shares after the Portfolio's Class IS shares have a full calendar year of return information to report. The Russell 2000® Growth Index measures the performance of the small-cap growth segment of the U.S. equity universe. It includes those Russell 2000® Index companies with higher price-to-book ratios and higher forecasted growth values. The Russell 2000® Index is a subset of the Russell 3000® Index representing approximately 10% of the total market capitalization of that index. It includes approximately 2,000 of the smallest securities based on a combination of their market capitalization and current index membership. It is not possible to invest directly in an index. The Lipper Small-Cap Growth Funds Index is an equally weighted performance index of the largest qualifying funds (based on net assets) in the Lipper Small-Cap Growth Funds classification. There are currently 30 funds represented in this Index. Other expenses have been estimated for the current fiscal year. The Portfolio's "Adviser," Morgan Stanley Investment Management Inc., has agreed to reduce its advisory fee and/or reimburse the Portfolio so that Total Annual Portfolio Operating Expenses, excluding certain investment related expenses, taxes, interest and other extraordinary expenses (including litigation), will not exceed 0.98% for Class IS. The fee waivers and/or expense reimbursements will continue for at least one year or until such time as the Board of Directors of Morgan Stanley Institutional Fund, Inc. (the "Fund") acts to discontinue all or a portion of such waivers and/or reimbursements when it deems such action is appropriate. MORGAN STANLEY INSTITUTIONAL FUND INC 485BPOS false 0000836487 2012-12-31 2013-07-12 2013-07-15 2013-07-15 SMALL COMPANY GROWTH PORTFOLIO MFLLX Principal Risks <p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">There is no assurance that the Portfolio will achieve its investment objective and you can lose money investing in this Portfolio. The principal risks of investing in the Portfolio include:</font> </p> <br/><p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><i>Equity Securities.</i></b></font> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">In general, prices of equity securities are more volatile than those of fixed income securities. The prices of equity securities fluctuate, and sometimes widely fluctuate, in response to activities specific to the issuer of the security as well as factors unrelated to the fundamental condition of the issuer, including general market, economic and political conditions. To the extent that the Portfolio invests in convertible securities, and the convertible security's investment value is greater than its conversion value, its price will be likely to increase when interest rates fall and decrease when interest rates rise. If the conversion value exceeds the investment value, the price of the convertible security will tend to fluctuate directly with the price of the underlying equity security.</font> </p> <br/><p style="margin: 0pt 0pt 6pt 0pt;" align="left"> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size: 8pt; font-family: Arial, Helvetica;"><strong><em>Foreign and Emerging Market Securities.</em></strong></font> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Investments in foreign markets entail special risks such as currency, political, economic and market risks. There also may be greater market volatility, less reliable financial information, higher transaction and custody costs, decreased market liquidity and less government and exchange regulation associated with investments in foreign markets. In addition, investments in certain foreign markets, which have historically been considered stable, may become more volatile and subject to increased risk due to ongoing developments and changing conditions in such markets. Moreover, the growing interconnectivity of global economies and financial markets has increased the probability that adverse developments and conditions in one country or region will affect the stability of economies and financial markets in other countries or regions. The risks of investing in emerging market countries are greater than risks associated with investments in foreign developed countries. In addition, the Portfolio's investments may be denominated in foreign currencies and therefore, to the extent unhedged, the value of the investment will fluctuate with the U.S. dollar exchange rates. To the extent hedged by use of foreign currency forward exchange contracts, the precise matching of foreign currency forward exchange contract amounts and the value of the securities involved will not generally be possible because the future value of such securities in foreign currencies will change as a consequence of market movements in the value of those securities between the date on which the contract is entered into and the date it matures. There is additional risk that such transactions reduce or preclude the opportunity for gain if the value of the currency should move in the direction opposite to the position taken and that foreign currency forward exchange contracts create exposure to currencies in which the Portfolio's securities are not denominated. The use of foreign currency forward exchange <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">contracts involves the risk of loss from the insolvency or bankruptcy of the counterparty to the contract or the failure of the counterparty to make payments or otherwise comply with the terms of the contract.</font><br /> </font> </p> <br/><p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><i>Small Cap Companies.</i></b></font> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Investments in small cap companies may involve greater risks than those associated with larger, more established companies. The securities issued by small cap companies may be less liquid, and such companies may have more limited markets, financial resources and product lines, and may lack the depth of management of larger companies.</font> </p> <br/><p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><i>Privately Placed and Restricted Securities.</i></b></font> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio's investments may also include privately placed securities, which are subject to resale restrictions. These securities will have the effect of increasing the level of Portfolio illiquidity to the extent the Portfolio may be unable to sell or transfer these securities due to restrictions on transfers or on the ability to find buyers interested in purchasing the securities. The illiquidity of the market, as well as the lack of publicly available information regarding these securities, may also adversely affect the ability to arrive at a fair value for certain securities at certain times and could make it difficult for the Portfolio to sell certain securities.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Shares of the Portfolio are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.</font> </p> Shares of the Portfolio are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency. There is no assurance that the Portfolio will achieve its investment objective and you can lose money investing in this Portfolio. Performance Information <p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio's Class I shares' performance from year-to-year and by showing how the Portfolio's average annual returns for the past one, five and 10 year periods compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time. The performance of the Class IS shares will differ because the Class IS shares have different ongoing fees. The Portfolio's past performance, before and after taxes, is not necessarily an indication of how the Portfolio will perform in the future. Updated performance information is available online at www.morganstanley.com/im.</font> </p> Annual Total Returns-Calendar Years (Class I)* 0.4413 0.1917 0.1355 0.1190 0.0304 -0.4184 0.4792 0.2720 -0.0912 0.1710 ~ http://morganstanley.com/20130712/role/ScheduleAnnualTotalReturnsBarChart20004 column dei_LegalEntityAxis compact ck0000836487_S000002825Member column rr_ProspectusShareClassAxis compact ck0000836487_C000007744Member row primary compact * ~ High Quarter 0.2500 2009-06-30 Low Quarter -0.2308 2008-12-31 <p style="margin: 3pt 0pt 0pt 0pt;" align="left"> <font style="font-size: 8pt; font-family: Arial, Helvetica;">*&#160;&#160;Class I shares are not offered in this Prospectus. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Class IS shares would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. The returns for Class IS shares are expected to be higher than the returns for Class I shares of the Portfolio as expenses of Class IS are estimated to be lower. Return information for the Portfolio's Class IS shares will be shown in future prospectuses offering the Portfolio's Class IS shares after the Portfolio's Class IS shares have a full calendar year of return information to report.</font> </p> <table border="0" cellspacing="0" cellpadding="0" width="100%"> <tr> <td colspan="3" width="65" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;"><b>High Quarter</b></font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="3" width="54" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">6/30/09</font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="1" width="8" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> &#160; </td> <td colspan="1" width="42" align="right" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">25.00</font> </p> </td> <td colspan="1" width="22" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt; white-space:nowrap"> <font style="font-size:8pt; font-family: Arial, Helvetica;">%</font> </p> </td> <td colspan="1" width="8"> &#160; </td> </tr> <tr> <td colspan="3" width="65" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;"><b>Low Quarter</b></font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="3" width="54" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">12/31/08</font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="1" width="8" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> &#160; </td> <td colspan="1" width="42" align="right" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">&#8211;23.08</font> </p> </td> <td colspan="1" width="22" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt; white-space:nowrap"> <font style="font-size:8pt; font-family: Arial, Helvetica;">%</font> </p> </td> <td colspan="1" width="8"> &#160; </td> </tr> </table> 0.1710 0.0309 0.1010 0.1067 0.1628 0.0285 0.0953 0.0836 0.1206 0.0262 0.0889 0.0819 0.1459 0.0349 0.0980 0.0674 0.1495 0.0209 0.0856 0.0858 1989-11-01 ~ http://morganstanley.com/20130712/role/ScheduleAverageAnnualReturnsTransposed20005 column dei_LegalEntityAxis compact ck0000836487_S000002825Member column rr_PerformanceMeasureAxis compact * row primary compact * ~ <p style="margin: 0pt 0pt 9pt 0pt;" align="left"> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes. After-tax returns for the Portfolio's Class IS shares will vary from Class I shares' returns. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Portfolio shares through tax deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns may be higher <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">than before-tax returns due to an assumed benefit from capital losses that would have been realized had Portfolio shares been sold at the end of the relevant periods, as applicable.</font><br /> </font> </p> The Portfolio's past performance, before and after taxes, is not necessarily an indication of how the Portfolio will perform in the future. www.morganstanley.com/im Class I shares are not offered in this Prospectus. (reflects no deduction for fees, expenses or taxes) Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Portfolio shares through tax deferred arrangements such as 401(k) plans or individual retirement accounts. The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio's Class I shares' performance from year-to-year and by showing how the Portfolio's average annual returns for the past one, five and 10 year periods compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time. The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Average Annual Total Returns (for the calendar periods ended December 31, 2012) After-tax returns may be higher than before-tax returns due to an assumed benefit from capital losses that would have been realized had Portfolio shares been sold at the end of the relevant periods, as applicable. After-tax returns for the Portfolio's Class IS shares will vary from Class I shares' returns. Objective <p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;"><i>The Small Company Growth Portfolio seeks long-term capital appreciation by investing primarily in growth-oriented equity securities of small capitalization companies.</i></font> </p> Principal Investment Strategies <p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Under normal market conditions, the Adviser seeks to achieve the Portfolio's investment objective by investing primarily in established and emerging companies from a universe comprised of small capitalization companies, most with market capitalizations of generally less than $4 billion.</font> </p> <br/><p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Under normal circumstances, at least 80% of the Portfolio's assets will be invested in equity securities of small capitalization companies. This policy may be changed without shareholder approval; however, you would be notified in writing of any changes. A company is considered to be a small capitalization company if it has a total market capitalization at the time of purchase of $4 billion or less.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Adviser emphasizes a bottom-up stock selection process, seeking attractive investments on an individual company basis. In selecting securities for investment, the Adviser seeks to invest in high quality companies it believes have sustainable competitive advantages and the ability to redeploy capital at high rates of return. The Adviser typically favors companies with rising returns on invested capital, above average business visibility, strong free cash flow generation and an attractive risk/reward. The Adviser generally considers selling an investment when it determines the company no longer satisfies its investment criteria.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio's equity investments may include common and preferred stocks, convertible securities and equity-linked securities, rights and warrants to purchase common stocks, depositary receipts, exchange-traded funds ("ETFs"), limited partnership interests and other specialty securities having equity features. The Portfolio may invest in privately placed and restricted securities.</font> </p> <br/><p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Adviser may invest up to 25% of the Portfolio's net assets in foreign securities, including emerging market securities, and securities classified as American Depositary Receipts ("ADRs"), Global Depositary Receipts ("GDRs"), American Depositary Shares ("ADSs") or Global Depositary Shares ("GDSs"), foreign U.S. dollar-denominated securities that are traded on a U.S. exchange or local shares of non-U.S. issuers.</font> </p> <br/><p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio may utilize foreign currency forward exchange contracts, which are derivatives, in connection with its investments in foreign securities.</font> </p> Example <p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The example below is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The example assumes that you invest $10,000 in the Portfolio, your investment has a 5% return each year and that the Portfolio's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font> </p> 100 312 ~ http://morganstanley.com/20130712/role/ScheduleExpenseExampleTransposed20003 column dei_LegalEntityAxis compact ck0000836487_S000002825Member row primary compact * ~ Fees and Expenses <p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The table below describes the fees and expenses that you may pay if you buy and hold Class IS shares of the Portfolio.</font> </p> -0.0200 0.0090 0.0000 0.0013 0.0103 -0.0005 0.0098 ~ http://morganstanley.com/20130712/role/ScheduleShareholderFees20001 column dei_LegalEntityAxis compact ck0000836487_S000002825Member row primary compact * ~ ~ http://morganstanley.com/20130712/role/ScheduleAnnualFundOperatingExpenses20002 column dei_LegalEntityAxis compact ck0000836487_S000002825Member row primary compact * ~ Shareholder Fees (fees paid directly from your investment) Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) Other expenses have been estimated for the current fiscal year. Portfolio Turnover <p style="margin: 0pt 0pt 8pt 0pt;" align="left"> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">These costs, which are not reflected in Total Annual Portfolio Operating Expenses or in the Example, affect Portfolio performance. During the most recent fiscal year, the Portfolio's portfolio turnover rate was 22% of the average value of its portfolio.</font><br /> </font> </p> 0.22 EX-101.SCH 3 ck0000836487-20130712.xsd XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT 000001 - Document - Document and Entity Information link:presentationLink link:definitionLink link:calculationLink 020000 - Document - Risk/Return Summary {Unlabeled} - SMALL COMPANY GROWTH PORTFOLIO link:presentationLink link:definitionLink link:calculationLink 020001 - Schedule - Shareholder Fees link:presentationLink link:definitionLink link:calculationLink 020002 - Schedule - Annual Fund Operating Expenses link:presentationLink link:definitionLink link:calculationLink 020003 - Schedule - Expense Example {Transposed} link:presentationLink link:definitionLink link:calculationLink 020004 - Schedule - Annual Total Returns [Bar Chart] link:presentationLink link:definitionLink link:calculationLink 020005 - Schedule - Average Annual Returns {Transposed} link:presentationLink link:definitionLink link:calculationLink 020006 - Disclosure - Risk/Return Detail Data {Elements} - SMALL COMPANY GROWTH PORTFOLIO link:presentationLink link:definitionLink link:calculationLink EX-101.LAB 4 ck0000836487-20130712_lab.xml XBRL TAXONOMY EXTENSION LABELS LINKBASE DOCUMENT EX-101.DEF 5 ck0000836487-20130712_def.xml XBRL TAXONOMY EXTENSION DEFINITION LINKBASE DOCUMENT EX-101.PRE 6 ck0000836487-20130712_pre.xml XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT EX-101.CAL 7 ck0000836487-20130712_cal.xml XBRL TAXONOMY EXTENSION CALCULATION LINKBASE DOCUMENT XML 8 R8.xml IDEA: Risk/Return Detail Data - SMALL COMPANY GROWTH PORTFOLIO 2.4.0.8020006 - Disclosure - Risk/Return Detail Data {Elements} - SMALL COMPANY GROWTH PORTFOLIOtruetruefalse1false falsefalseS000002825Memberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00pureStandardhttp://www.xbrl.org/2003/instancepurexbrli01true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse02false 4rr_RiskReturnHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00SMALL COMPANY GROWTH PORTFOLIOfalsefalsefalsexbrli:stringItemTypestringRisk/Return Summary Investment Objectives/Goals Include the following information, in plain English under rule 421(d) under the Securities Act, in the order and subject matter indicatedReference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 false03false 4rr_ObjectiveHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Objectivefalsefalsefalsexbrli:stringItemTypestringInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false04false 4rr_ObjectivePrimaryTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;"><i>The Small Company Growth Portfolio seeks long-term capital appreciation by investing primarily in growth-oriented equity securities of small capitalization companies.</i></font> </p>falsefalsefalsenonnum:textBlockItemTypenaInvestment Objectives/Goals. Disclose the Fund's investment objectives or goals. A Fund also may identify its type or category (e.g., that it is a Money Market Fund or a balanced fund).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 2 -Subsection a false05false 4rr_ExpenseHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Fees and Expensesfalsefalsefalsexbrli:stringItemTypestringRisk/Return Summary Fee Table Includes the following information, in plain English under rule 421(d) under the Securities Act, after Item 2 Fees and expenses of the Fund This table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Shareholder Fees (fees paid directly from your investment) Example This Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds. The Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be You would pay the following expenses if you did not redeem your shares The Example does not reflect sales charges (loads) on reinvested dividends [and other distributions]. If these sales charges (loads) were included, your costs would be higher. Portfolio Turnover The Fund pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover may indicate higher transaction costs. These costs, which are not reflected in annual fund operating expenses or in the example, affect the Fund's performance. During the most recent fiscal year, the Fund's portfolio turnover rate was __% of the average value of its whole portfolio. Instructions. A.3.instructions.6 New Funds. For purposes of this Item, a "New Fund" is a Fund that does not include in Form N-1A financial statements reporting operating results or that includes financial statements for the Fund's initial fiscal year reporting operating results for a period of 6 months or less. The following Instructions apply to New Funds.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph d false06false 4rr_ExpenseNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The table below describes the fees and expenses that you may pay if you buy and hold Class IS shares of the Portfolio.</font> </p>falsefalsefalsenonnum:textBlockItemTypenaThis table describes the fees and expenses that you may pay if you buy and hold shared of the Fund. You may qualify for sales charge discounts if you and your family invest, or agree to invest in the future, at least $[_____] in [name of fund family] funds. Include the narrative explanations in the order indicated. A Fund may modify the narrative explanations if the explanation contains comparable information to that shown. The narrative explanation regarding sales charge discounts is only required by a Fund that offers such discounts and should specify the minimum level of investment required to qualify for a discount. Modify the narrative explanation to state that Fund shares are sold on a national securities exchange at the end of the time periods indicated, and that brokerage commissions for buying and selling Fund shares through a broker are not reflected.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 1 -Subparagraph b false07false 4rr_ShareholderFeesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 Shareholder Fees (fees paid directly from your investment) falsefalsefalsexbrli:stringItemTypestringShareholder Fees (fees paid directly from your investment).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 false08false 4rr_OperatingExpensesCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment) falsefalsefalsexbrli:stringItemTypestringAnnual Fund Operating Expenses (ongoing expenses that you pay each year as a percentage of the value of your investment)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 7 false09false 4rr_PortfolioTurnoverHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Portfolio Turnoverfalsefalsefalsexbrli:stringItemTypestringDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 5 false010false 4rr_PortfolioTurnoverTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin: 0pt 0pt 8pt 0pt;" align="left"> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">These costs, which are not reflected in Total Annual Portfolio Operating Expenses or in the Example, affect Portfolio performance. During the most recent fiscal year, the Portfolio's portfolio turnover rate was 22% of the average value of its portfolio.</font><br /> </font> </p>falsefalsefalsenonnum:textBlockItemTypenaDisclose the portfolio turnover rate provided in response to Item 14(a) for the most recent fiscal year (or for such shorter period as the Fund has been in operation). Disclose the period for which the information is provided if less than a full fiscal year. A Fund that is a Money Market Fund may omit the portfolio turnover information required by this Item.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false011false 4rr_PortfolioTurnoverRaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.220.22falsefalsefalsexbrli:pureItemTypepureThis element represents the rate of portfolio turnover presented as a percentage (SEC Form N-1A 2006-09-14 A.3.example.3 Portfolio Turnover A.3.instructions.5 Portfolio Turnover).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 3 false012false 4rr_OtherExpensesNewFundBasedOnEstimatesrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Other expenses have been estimated for the current fiscal year.falsefalsefalsexbrli:stringItemTypestringThis element represents the disclosure for new funds that "Other Expenses" are based on estimated amounts for the current fiscal year.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 6 -Subparagraph a false013false 4rr_ExpenseExampleHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Examplefalsefalsefalsexbrli:stringItemTypestringHeading for Expense Example.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false014false 4rr_ExpenseExampleNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The example below is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The example assumes that you invest $10,000 in the Portfolio, your investment has a 5% return each year and that the Portfolio's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:</font> </p>falsefalsefalsenonnum:textBlockItemTypenaThe Example is intended to help you compare the cost of investing in the Fund with the cost of investing in other mutual funds.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 1 false015false 4rr_StrategyHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Investment Strategiesfalsefalsefalsexbrli:stringItemTypestringPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false016false 4rr_StrategyNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Under normal market conditions, the Adviser seeks to achieve the Portfolio's investment objective by investing primarily in established and emerging companies from a universe comprised of small capitalization companies, most with market capitalizations of generally less than $4 billion.</font> </p> <br/><p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Under normal circumstances, at least 80% of the Portfolio's assets will be invested in equity securities of small capitalization companies. This policy may be changed without shareholder approval; however, you would be notified in writing of any changes. A company is considered to be a small capitalization company if it has a total market capitalization at the time of purchase of $4 billion or less.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Adviser emphasizes a bottom-up stock selection process, seeking attractive investments on an individual company basis. In selecting securities for investment, the Adviser seeks to invest in high quality companies it believes have sustainable competitive advantages and the ability to redeploy capital at high rates of return. The Adviser typically favors companies with rising returns on invested capital, above average business visibility, strong free cash flow generation and an attractive risk/reward. The Adviser generally considers selling an investment when it determines the company no longer satisfies its investment criteria.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio's equity investments may include common and preferred stocks, convertible securities and equity-linked securities, rights and warrants to purchase common stocks, depositary receipts, exchange-traded funds ("ETFs"), limited partnership interests and other specialty securities having equity features. The Portfolio may invest in privately placed and restricted securities.</font> </p> <br/><p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Adviser may invest up to 25% of the Portfolio's net assets in foreign securities, including emerging market securities, and securities classified as American Depositary Receipts ("ADRs"), Global Depositary Receipts ("GDRs"), American Depositary Shares ("ADSs") or Global Depositary Shares ("GDSs"), foreign U.S. dollar-denominated securities that are traded on a U.S. exchange or local shares of non-U.S. issuers.</font> </p> <br/><p style="margin:0pt 0pt 8pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio may utilize foreign currency forward exchange contracts, which are derivatives, in connection with its investments in foreign securities.</font> </p>falsefalsefalsenonnum:textBlockItemTypenaPrincipal investment strategies of the Fund. Summarize how the Fund intends to achieve its investment objectives by identifying the Fund's principal investment strategies (including the type or types of securities in which the Fund invests or will invest principally) and any policy to concentrate in securities of issuers in a particular industry or group of industries.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection a false017false 4rr_RiskHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Principal Risksfalsefalsefalsexbrli:stringItemTypestringNarrative Risk Disclosure.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 false018false 4rr_RiskNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">There is no assurance that the Portfolio will achieve its investment objective and you can lose money investing in this Portfolio. The principal risks of investing in the Portfolio include:</font> </p> <br/><p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><i>Equity Securities.</i></b></font> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">In general, prices of equity securities are more volatile than those of fixed income securities. The prices of equity securities fluctuate, and sometimes widely fluctuate, in response to activities specific to the issuer of the security as well as factors unrelated to the fundamental condition of the issuer, including general market, economic and political conditions. To the extent that the Portfolio invests in convertible securities, and the convertible security's investment value is greater than its conversion value, its price will be likely to increase when interest rates fall and decrease when interest rates rise. If the conversion value exceeds the investment value, the price of the convertible security will tend to fluctuate directly with the price of the underlying equity security.</font> </p> <br/><p style="margin: 0pt 0pt 6pt 0pt;" align="left"> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size: 8pt; font-family: Arial, Helvetica;"><strong><em>Foreign and Emerging Market Securities.</em></strong></font> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Investments in foreign markets entail special risks such as currency, political, economic and market risks. There also may be greater market volatility, less reliable financial information, higher transaction and custody costs, decreased market liquidity and less government and exchange regulation associated with investments in foreign markets. In addition, investments in certain foreign markets, which have historically been considered stable, may become more volatile and subject to increased risk due to ongoing developments and changing conditions in such markets. Moreover, the growing interconnectivity of global economies and financial markets has increased the probability that adverse developments and conditions in one country or region will affect the stability of economies and financial markets in other countries or regions. The risks of investing in emerging market countries are greater than risks associated with investments in foreign developed countries. In addition, the Portfolio's investments may be denominated in foreign currencies and therefore, to the extent unhedged, the value of the investment will fluctuate with the U.S. dollar exchange rates. To the extent hedged by use of foreign currency forward exchange contracts, the precise matching of foreign currency forward exchange contract amounts and the value of the securities involved will not generally be possible because the future value of such securities in foreign currencies will change as a consequence of market movements in the value of those securities between the date on which the contract is entered into and the date it matures. There is additional risk that such transactions reduce or preclude the opportunity for gain if the value of the currency should move in the direction opposite to the position taken and that foreign currency forward exchange contracts create exposure to currencies in which the Portfolio's securities are not denominated. The use of foreign currency forward exchange <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">contracts involves the risk of loss from the insolvency or bankruptcy of the counterparty to the contract or the failure of the counterparty to make payments or otherwise comply with the terms of the contract.</font><br /> </font> </p> <br/><p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><i>Small Cap Companies.</i></b></font> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Investments in small cap companies may involve greater risks than those associated with larger, more established companies. The securities issued by small cap companies may be less liquid, and such companies may have more limited markets, financial resources and product lines, and may lack the depth of management of larger companies.</font> </p> <br/><p style="margin:0pt 0pt 6pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">&#8226;&#160;&#160;</font><font style="font-size:8pt; font-family: Arial, Helvetica;"><b><i>Privately Placed and Restricted Securities.</i></b></font> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The Portfolio's investments may also include privately placed securities, which are subject to resale restrictions. These securities will have the effect of increasing the level of Portfolio illiquidity to the extent the Portfolio may be unable to sell or transfer these securities due to restrictions on transfers or on the ability to find buyers interested in purchasing the securities. The illiquidity of the market, as well as the lack of publicly available information regarding these securities, may also adversely affect the ability to arrive at a fair value for certain securities at certain times and could make it difficult for the Portfolio to sell certain securities.</font> </p> <br/><p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">Shares of the Portfolio are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.</font> </p>falsefalsefalsenonnum:textBlockItemTypenaNarrative Risk Disclosure. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i -Clause instruction false019false 4rr_RiskLoseMoneyrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00There is no assurance that the Portfolio will achieve its investment objective and you can lose money investing in this Portfolio.falsefalsefalsexbrli:stringItemTypestringSummarize the principal risks of investing in the Fund, including the risks to which the Fund's portfolio as a whole is subject and the circumstances reasonably likely to affect adversely the Fund's net asset value, yield, and total return. Unless the Fund is a Money Market Fund, disclose that loss of money is a risk of investing in the Fund. A Fund may, in responding to this Item, describe the types of investors for whom the Fund is intended or the types of investment goals that may be consistent with an investment in the Fund.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph i false020false 4rr_RiskNotInsuredDepositoryInstitutionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Shares of the Portfolio are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.falsefalsefalsexbrli:stringItemTypestringIf the Fund is advised by or sold through an insured depository institution, state that An investment in the Fund is not a deposit of the bank and is not insured or guaranteed by the Federal Deposit Insurance Corporation or any other government agency. A Money Market Fund that is advised by or sold through an insured depository institution should combine the disclosure required by Items 2(c)(1)(ii) and (iii) in a single statement.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 1 -Subparagraph iii false021false 4rr_BarChartAndPerformanceTableHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Performance Informationfalsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false022false 4rr_PerformanceNarrativeTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin:0pt 0pt 9pt 0pt;" align="left"> <font style="font-size:10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio's Class I shares' performance from year-to-year and by showing how the Portfolio's average annual returns for the past one, five and 10 year periods compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time. The performance of the Class IS shares will differ because the Class IS shares have different ongoing fees. The Portfolio's past performance, before and after taxes, is not necessarily an indication of how the Portfolio will perform in the future. Updated performance information is available online at www.morganstanley.com/im.</font> </p>falsefalsefalsenonnum:textBlockItemTypenaRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false023false 4rr_PerformanceInformationIllustratesVariabilityOfReturnsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio's Class I shares' performance from year-to-year and by showing how the Portfolio's average annual returns for the past one, five and 10 year periods compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false024false 4rr_PerformanceAvailabilityWebSiteAddressrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00www.morganstanley.com/imfalsefalsefalsexbrli:stringItemTypestringIf applicable, include a statement explaining that updated performance information is available and providing a Website address and/or toll-free (or collect) telephone number where the updated information may be obtained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false025false 4rr_PerformancePastDoesNotIndicateFuturerr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The Portfolio's past performance, before and after taxes, is not necessarily an indication of how the Portfolio will perform in the future.falsefalsefalsexbrli:stringItemTypestringInclude the bar chart and table required by paragraphs (b)(2)(ii) and (iii) of this section. Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i false026false 4rr_BarChartHeadingrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Annual Total Returns-Calendar Years (Class I)*falsefalsefalsexbrli:stringItemTypestringRisk/Return Bar Chart and Table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 false027false 4rr_BarChartFootnotesTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<table border="0" cellspacing="0" cellpadding="0" width="100%"> <tr> <td colspan="3" width="65" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;"><b>High Quarter</b></font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="3" width="54" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">6/30/09</font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="1" width="8" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> &#160; </td> <td colspan="1" width="42" align="right" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">25.00</font> </p> </td> <td colspan="1" width="22" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt; white-space:nowrap"> <font style="font-size:8pt; font-family: Arial, Helvetica;">%</font> </p> </td> <td colspan="1" width="8"> &#160; </td> </tr> <tr> <td colspan="3" width="65" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;"><b>Low Quarter</b></font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="3" width="54" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">12/31/08</font> </p> </td> <td colspan="1"> &#160; </td> <td colspan="1" width="8" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> &#160; </td> <td colspan="1" width="42" align="right" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt"> <font style="font-size:8pt; font-family: Arial, Helvetica;">&#8211;23.08</font> </p> </td> <td colspan="1" width="22" align="left" valign="bottom" style="padding:0pt .7pt 0pt 0pt;"> <p style="margin:0pt 0pt 0pt 0pt; white-space:nowrap"> <font style="font-size:8pt; font-family: Arial, Helvetica;">%</font> </p> </td> <td colspan="1" width="8"> &#160; </td> </tr> </table>falsefalsefalsenonnum:textBlockItemTypenaMultiple Class Funds.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 false028false 4rr_BarChartClosingTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin: 3pt 0pt 0pt 0pt;" align="left"> <font style="font-size: 8pt; font-family: Arial, Helvetica;">*&#160;&#160;Class I shares are not offered in this Prospectus. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Class IS shares would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. The returns for Class IS shares are expected to be higher than the returns for Class I shares of the Portfolio as expenses of Class IS are estimated to be lower. Return information for the Portfolio's Class IS shares will be shown in future prospectuses offering the Portfolio's Class IS shares after the Portfolio's Class IS shares have a full calendar year of return information to report.</font> </p>falsefalsefalsenonnum:textBlockItemTypenaIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false029false 4rr_BarChartReturnsForClassNotOfferedInProspectusrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Class I shares are not offered in this Prospectus. falsefalsefalsexbrli:stringItemTypestringWhen a Multiple Class Fund offering one or more Classes offers a new Class in a prospectus that does not offer the shares of any other Class, include the bar chart with annual total returns for any other existing Class for the first year that the Class is offered. Explain in a footnote that the returns are for a Class that is not offered in the prospectus that would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. Include return information for the other Class reflected in the bar chart in the performance table.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit b false030false 4rr_HighestQuarterlyReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00High Quarterfalsefalsefalsexbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false031false 4rr_BarChartHighestQuarterlyReturnDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002009-06-30falsefalsetruexbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false032false 4rr_BarChartHighestQuarterlyReturnrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.25000.2500falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false033false 4rr_LowestQuarterlyReturnLabelrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Low Quarterfalsefalsefalsexbrli:stringItemTypestringIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false034false 4rr_BarChartLowestQuarterlyReturnDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse002008-12-31falsefalsetruexbrli:dateItemTypedateIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false035false 4rr_BarChartLowestQuarterlyReturnrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse-0.2308-0.2308falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false036false 4rr_IndexNoDeductionForFeesExpensesTaxesrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00(reflects no deduction for fees, expenses or taxes)falsefalsefalsexbrli:stringItemTypestringThe Performance Table includes a parenthetical, indicating that the Index "(reflects no deduction for fees, expenses or taxes)". This tag is used when this is reflected in a footnote.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 5 false037false 4rr_PerformanceTableUsesHighestFederalRaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that after-tax returns are calculated using the historical highest individual federal marginal income tax rates and do not reflect the impact of state and local taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii false038false 4rr_PerformanceTableNotRelevantToTaxDeferredrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Portfolio shares through tax deferred arrangements such as 401(k) plans or individual retirement accounts.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that the actual after-tax returns depend on an investor's tax situation and may differ from those shown, and after-tax returns shown are not relevant to investors who hold their Fund shares through tax-deferred arrangements, such as 401(k) plans or individual retirement accounts.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv -Clause B false039false 4rr_PerformanceTableOneClassOfAfterTaxShownrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00After-tax returns for the Portfolio's Class IS shares will vary from Class I shares' returns.falsefalsefalsexbrli:stringItemTypestringProvide a brief explanation that if the Fund is a Multiple Class Fund that offers more than one Class in the prospectus, after-tax returns are shown for only one Class and after-tax returns for other Classes will vary.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv -Clause C false040false 4rr_PerformanceTableExplanationAfterTaxHigherrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00 After-tax returns may be higher than before-tax returns due to an assumed benefit from capital losses that would have been realized had Portfolio shares been sold at the end of the relevant periods, as applicable.falsefalsefalsexbrli:stringItemTypestringIf average annual total return (after taxes on distributions and redemption) is higher than average annual total return, the reason for this result may be explained.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iv -Clause D false041false 4rr_PerformanceTableClosingTextBlockrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00<p style="margin: 0pt 0pt 9pt 0pt;" align="left"> <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes. After-tax returns for the Portfolio's Class IS shares will vary from Class I shares' returns. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Portfolio shares through tax deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns may be higher <font style="font-size: 10pt; font-family: Times New Roman PS Std, Times New Roman PS, Times New Roman, Times;">than before-tax returns due to an assumed benefit from capital losses that would have been realized had Portfolio shares been sold at the end of the relevant periods, as applicable.</font><br /> </font> </p> falsefalsefalsenonnum:textBlockItemTypenaIf the Fund has annual returns for at least one calendar year, provide a table showing the Fund's (A) average annual total return; (B) average annual total return (after taxes on distributions); and (C) average annual total return (after taxes on distributions and redemption). A Money Market Fund should show only the returns described in clause (A) of the preceding sentence. All returns should be shown for 1-, 5-, and 10- calendar year periods ending on the date of the most recently completed calendar year (or for the life of the Fund, if shorter), but only for periods subsequent to the effective date of the Fund's registration statement. The table also should show the returns of an appropriate broad-based securities market index as defined in Instruction 5 to Item 22(b)(7) for the same periods. A Fund that has been in existence for more than 10 years also may include returns for the life of the Fund. A Money Market Fund may provide the Fund's 7-day yield ending on the date of the most recent calendar year or disclose a toll-free (or collect) telephone number that investors can use to obtain the Fund's current 7-day yield. For a Fund (other than a Money Market Fund or a Fund described in General Instruction C.3.(d)(iii)), provide the information in the following table with the specified captions AVERAGE ANNUAL TOTAL RETURNS (For the periods ended December 31, _____)Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii false042false 4rr_AverageAnnualReturnCaptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsetruefalse00 Average Annual Total Returns (for the calendar periods ended December 31, 2012) falsefalsefalsexbrli:stringItemTypestringThis item represents Average Anuual Total Returns. If a Multiple Class Fund offers a Class in the prospectus that converts into another Class after a stated period, compute average annual total returns in the table by using the returns of the other Class for the period after conversion.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 5 false043false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse2false truefalseS000002825Member_index_Russell_2000174_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseSMALL COMPANY GROWTH PORTFOLIOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_S000002825Memberdei_LegalEntityAxisexplicitMemberfalsefalseRussell 2000® Growth Index (reflects no deduction for fees, expenses or taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_index_Russell_2000174_Growth_Index_reflects_no_deduction_for_fees_expenses_or_taxesMemberrr_PerformanceMeasureAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse044true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse045false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.14590.1459[1]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false046false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.03490.0349[1]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false047false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.09800.0980[1]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false048false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.06740.0674[1]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false049false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse3false truefalseS000002825Member_index_Lipper_SmallCap_Growth_Funds_Index_reflects_no_deduction_for_taxesMemberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseSMALL COMPANY GROWTH PORTFOLIOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_S000002825Memberdei_LegalEntityAxisexplicitMemberfalsefalseLipper Small-Cap Growth Funds Index (reflects no deduction for taxes)rr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_index_Lipper_SmallCap_Growth_Funds_Index_reflects_no_deduction_for_taxesMemberrr_PerformanceMeasureAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse050true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse051false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.14950.1495[2]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false052false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.02090.0209[2]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false053false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.08560.0856[2]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false054false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.08580.0858[2]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false055false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse4false USDtruefalse$S000002825Member_C000129402Memberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseSMALL COMPANY GROWTH PORTFOLIOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_S000002825Memberdei_LegalEntityAxisexplicitMemberfalsefalseClass ISrr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_C000129402Memberrr_ProspectusShareClassAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0usdStandardhttp://www.xbrl.org/2003/iso4217USDiso42170USDUSD$nanafalse056true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse057false 4rr_RedemptionFeeOverRedemptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.0200-0.0200falsefalsefalserr:NonPositivePure4Typepure"Redemption Fee" (as a percentage of amount redeemed, if applicable) If the Fund is an Exchange-Traded Fund and issues or redeems shares in creation units of not less than 25,000 shares each, exclude any fees charged for the purchase and redemption of the Fund's creation units. "Redemption Fee" includes a fee charged for any redemption of the Fund's shares, but does not include a deferred sales charge (load) imposed upon redemption.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 2 -Subparagraph b false058false 4rr_ManagementFeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00900.0090falsefalsefalserr:NonNegativePure4TypepureManagement Fees include investment advisory fees (including any fees based on the Fund's performance), any other management fees payable to the investment adviser or its affiliates, and administrative fees payable to the investment adviser or its affiliates that are not included as "Other Expenses."Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph a false059false 4rr_DistributionAndService12b1FeesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00000.0000falsefalsefalserr:NonNegativePure4TypepureDistribution [and/or Service] (12b-1) Fees" include all distribution or other expenses incurred during the most recent fiscal year under a plan adopted pursuant to rule 12b-1 [17 CFR 270.12b-1]. Under an appropriate caption or a subcaption of "Other Expenses," disclose the amount of any distribution or similar expenses deducted from the Fund's assets other than pursuant to a rule 12b-1 plan.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 9 false060false 4rr_OtherExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00130.0013[3]falsefalsefalserr:NonNegativePure4Typepure"Other Expenses" include all expenses not otherwise disclosed in the table that are deducted from the Fund's assets or charged to all shareholder accounts. The amount of expenses deducted from the Fund's assets are the amounts shown as expenses in the Fund's statement of operations (including increases resulting from complying with paragraph 2(g) of rule 6-07 of Regulation S-X [17 CFR 210.6-07]). "Other Expenses" do not include extraordinary expenses as determined under generally accepted accounting principles (see Accounting Principles Board Opinion No. 30). If extraordinary expenses were incurred that materially affected the Fund's "Other Expenses," disclose in a footnote to the table what "Other Expenses" would have been had the extraordinary expenses been included.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph c -Clause i false061false 4rr_ExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.01030.0103[4]falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses. If the Fund is a Feeder Fund, reflect the aggregate expenses of the Feeder Fund and the Master Fund in a single fee table using the captions provided. In a footnote to the fee table, state that the table and Example reflect the expenses of both the Feeder and Master Funds. If the prospectus offers more than one Class of a Multiple Class Fund or more than one Feeder Fund that invests in the same Master Fund, provide a separate response for each Class or Feeder Fund. Base the percentages of "Annual Fund Operating Expenses" on amounts incurred during the Fund's most recent fiscal year, but include in expenses amounts that would have been incurred absent expense reimbursement or fee waiver arrangements. If the Fund has changed its fiscal year and, as a result, the most recent fiscal year is less than three months, use the fiscal year prior to the most recent fiscal year as the basis for determining "Annual Fund Operating Expenses."Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 3 -Subparagraph d false062false 4rr_FeeWaiverOrReimbursementOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue-0.0005-0.0005[4]falsefalsefalserr:NonPositivePure4TypepureTotal Annual Fund Operating Expenses. If there were expense reimbursement or fee waiver arrangements that reduced any Fund operating expenses and will continue to reduce them for no less than one year from the effective date of the Fund's registration statement, a Fund may add two captions to the table one caption showing the amount of the expense reimbursement or fee waiver, and a second caption showing the Fund's net expenses after subtracting the fee reimbursement or expense waiver from the total fund operating expenses. The Fund should place these additional captions directly below the "Total Annual Fund Operating Expenses" caption of the table and should use appropriate descriptive captions, such as "Fee Waiver [and/or Expense Reimbursement]" and "Total Annual Fund Operating Expenses After Fee Waiver [and/or Expense Reimbursement]," respectively. If the Fund provides this disclosure, also disclose the period for which the expense reimbursement or fee waiver arrangement is expected to continue, and briefly describe who can terminate the arrangement and under what circumstances.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false063false 4rr_NetExpensesOverAssetsrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruetrue0.00980.0098[4]falsefalsefalserr:NonNegativePure4TypepureTotal Annual Fund Operating Expenses.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection table -Paragraph 1 -Subparagraph 11 false064false 4rr_ExpenseExampleYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue100100USD$falsetruefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection instructions -Paragraph 4 false265false 4rr_ExpenseExampleYear03rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truefalsetrue312312USD$falsetruefalserr:NonNegativeMonetaryTypemonetaryThe Example assumes that you invest $10,000 in the Fund for the time periods indicated and then you redeem all of your shares at the end of those periods. The Example also assumes that your investment has a 5% return per year and that the Fund's operating expenses remained the same. Although your actual costs may be higher or lower.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 3 -Subsection example -Paragraph 1 -Subparagraph 2 false266false 4rr_PerformanceOneYearOrLessrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1falsefalsefalse00As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio.falsefalsefalsexbrli:stringItemTypestringFor a Fund that provides annual total returns for only one calendar year or for a Fund that does not include the bar chart because it does not have annual returns for a full calendar year, modify, as appropriate, the narrative explanation required by stating that the information gives some indication of the risks of an investment in the Fund by comparing the Fund's performance with a broad measure of market performance). Provide a brief explanation of how the information illustrates the variability of the Fund's returns (e.g., by stating that the information provides some indication of the risks of investing in the Fund by showing changes in the Fund's performance from year to year and by showing how the Fund's average annual returns for 1, 5, and 10 years compare with those of a broad measure of market performance). Provide a statement to the effect that the Fund's past performance (before and after taxes) is not necessarily an indication of how the Fund will perform in the future.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph i Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 1 -Exhibit b false067false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruetrue00&nbsp;&nbsp;[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false068false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruetrue00&nbsp;&nbsp;[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false069false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruetrue00&nbsp;&nbsp;[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false070false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruetrue00&nbsp;&nbsp;[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false071false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse5false truefalseS000002825Member_C000007744Memberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseSMALL COMPANY GROWTH PORTFOLIOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_S000002825Memberdei_LegalEntityAxisexplicitMemberfalsefalseCLASS Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_C000007744Memberrr_ProspectusShareClassAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse072true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse073false 4rr_AnnualReturn2003rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.44130.4413falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false074false 4rr_AnnualReturn2004rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.19170.1917falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false075false 4rr_AnnualReturn2005rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.13550.1355falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false076false 4rr_AnnualReturn2006rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.11900.1190falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false077false 4rr_AnnualReturn2007rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.03040.0304falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false078false 4rr_AnnualReturn2008rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse-0.4184-0.4184falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false079false 4rr_AnnualReturn2009rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.47920.4792falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false080false 4rr_AnnualReturn2010rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.27200.2720falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false081false 4rr_AnnualReturn2011rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse-0.0912-0.0912falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 3 -Exhibit a false082false 4rr_AnnualReturn2012rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalselabel1truetruefalse0.17100.1710falsefalsefalsexbrli:pureItemTypepureIf the Fund has annual returns for at least one calendar year, provide a bar chart showing the Fund's annual total returns for each of the last 10 calendar years (or for the life of the Fund if less than 10 years), but only for periods subsequent to the effective date of the Fund's registration statement. Present the corresponding numerical return adjacent to each bar. If the Fund's fiscal year is other than a calendar year, include the year-to-date return information as of the end of the most recent quarter in a footnote to the bar chart. Following the bar chart, disclose the Fund's highest and lowest return for a quarter during the 10 years or other period of the bar chart. When a Multiple Class Fund offers more than one Class in the prospectus, provide annual total returns in the bar chart for only one of those Classes. The Fund can select which Class to include (e.g., the oldest Class, the Class with the greatest net assets).Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph ii false083false 4rr_AverageAnnualReturnYear01rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.17100.1710[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false084false 4rr_AverageAnnualReturnYear05rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.03090.0309[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false085false 4rr_AverageAnnualReturnYear10rr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.10100.1010[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false086false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.10670.1067[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false087false 4rr_AverageAnnualReturnInceptionDaterr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1falsetruefalse001989-11-01[5]falsefalsetruexbrli:dateItemTypedateReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph instructions -Clause 4 false088false 0truefalsetruefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalse6false truefalseS000002825Member_AfterTaxesOnDistributionsMember_C000007744Memberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseSMALL COMPANY GROWTH PORTFOLIOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_S000002825Memberdei_LegalEntityAxisexplicitMemberfalsefalseCLASS Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_C000007744Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on 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truefalseS000002825Member_AfterTaxesOnDistributionsAndSalesMember_C000007744Memberhttp://www.sec.gov/CIK0000836487duration2012-12-31T00:00:002012-12-31T00:00:00falsefalseSMALL COMPANY GROWTH PORTFOLIOdei_LegalEntityAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_S000002825Memberdei_LegalEntityAxisexplicitMemberfalsefalseCLASS Irr_ProspectusShareClassAxisxbrldihttp://xbrl.org/2006/xbrldick0000836487_C000007744Memberrr_ProspectusShareClassAxisexplicitMemberfalsefalseAfter Taxes on Distributions and Sale of Portfolio Sharesrr_PerformanceMeasureAxisxbrldihttp://xbrl.org/2006/xbrldirr_AfterTaxesOnDistributionsAndSalesMemberrr_PerformanceMeasureAxisexplicitMemberpureStandardhttp://www.xbrl.org/2003/instancepurexbrli0nanafalse095true 3rr_RiskReturnAbstractrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalse1falsefalsefalse00falsefalsefalsexbrli:stringItemTypestringfalse096false 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http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false099false 4rr_AverageAnnualReturnSinceInceptionrr_falsenadurationfalsefalsefalsefalsefalsefalsefalsefalseterseLabel1truetruetrue0.08190.0819[5]falsefalsefalsexbrli:pureItemTypepureReturn Before Taxes.Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Form -Number N-1A -Chapter A -Section 4 -Subsection b -Paragraph 2 -Subparagraph iii -Clause 1 -Exhibit 2 false01The Russell 2000® Growth Index measures the performance of the small-cap growth segment of the U.S. equity universe. It includes those Russell 2000® Index companies with higher price-to-book ratios and higher forecasted growth values. The Russell 2000® Index is a subset of the Russell 3000® Index representing approximately 10% of the total market capitalization of that index. It includes approximately 2,000 of the smallest securities based on a combination of their market capitalization and current index membership. It is not possible to invest directly in an index.2The Lipper Small-Cap Growth Funds Index is an equally weighted performance index of the largest qualifying funds (based on net assets) in the Lipper Small-Cap Growth Funds classification. There are currently 30 funds represented in this Index.3Other expenses have been estimated for the current fiscal year.4The Portfolio's "Adviser," Morgan Stanley Investment Management Inc., has agreed to reduce its advisory fee and/or reimburse the Portfolio so that Total Annual Portfolio Operating Expenses, excluding certain investment related expenses, taxes, interest and other extraordinary expenses (including litigation), will not exceed 0.98% for Class IS. The fee waivers and/or expense reimbursements will continue for at least one year or until such time as the Board of Directors of Morgan Stanley Institutional Fund, Inc. (the "Fund") acts to discontinue all or a portion of such waivers and/or reimbursements when it deems such action is appropriate.5Class I shares are not offered in this Prospectus. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Class IS shares would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. The returns for Class IS shares are expected to be higher than the returns for Class I shares of the Portfolio as expenses of Class IS are estimated to be lower. Return information for the Portfolio's Class IS shares will be shown in future prospectuses offering the Portfolio's Class IS shares after the Portfolio's Class IS shares have a full calendar year of return information to report.falseRisk/Return Detail Data - SMALL COMPANY GROWTH PORTFOLIO (SMALL COMPANY GROWTH PORTFOLIO, USD $)NoRoundingUnKnownUnKnownUnKnowntruefalsefalseSheethttp://morganstanley.com/20130712/role/DisclosureRiskReturnDetailDataElementsSMALLCOMPANYGROWTHPORTFOLIO199 XML 9 Show.js IDEA: XBRL DOCUMENT /** * Rivet Software Inc. * * @copyright Copyright (c) 2006-2011 Rivet Software, Inc. 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Label Element Value
Risk/Return: rr_RiskReturnAbstract  
Risk/Return [Heading] rr_RiskReturnHeading SMALL COMPANY GROWTH PORTFOLIO
Objective [Heading] rr_ObjectiveHeading Objective
Objective, Primary [Text Block] rr_ObjectivePrimaryTextBlock

The Small Company Growth Portfolio seeks long-term capital appreciation by investing primarily in growth-oriented equity securities of small capitalization companies.

Expense [Heading] rr_ExpenseHeading Fees and Expenses
Expense Narrative [Text Block] rr_ExpenseNarrativeTextBlock

The table below describes the fees and expenses that you may pay if you buy and hold Class IS shares of the Portfolio.

Shareholder Fees Caption [Text] rr_ShareholderFeesCaption Shareholder Fees (fees paid directly from your investment)
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Portfolio Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Portfolio Turnover [Heading] rr_PortfolioTurnoverHeading Portfolio Turnover
Portfolio Turnover [Text Block] rr_PortfolioTurnoverTextBlock

The Portfolio pays transaction costs, such as commissions, when it buys and sells securities (or "turns over" its portfolio). A higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Portfolio shares are held in a taxable account. These costs, which are not reflected in Total Annual Portfolio Operating Expenses or in the Example, affect Portfolio performance. During the most recent fiscal year, the Portfolio's portfolio turnover rate was 22% of the average value of its portfolio.

Portfolio Turnover, Rate rr_PortfolioTurnoverRate 22.00%
Other Expenses, New Fund, Based on Estimates [Text] rr_OtherExpensesNewFundBasedOnEstimates Other expenses have been estimated for the current fiscal year.
Expense Example [Heading] rr_ExpenseExampleHeading Example
Expense Example Narrative [Text Block] rr_ExpenseExampleNarrativeTextBlock

The example below is intended to help you compare the cost of investing in the Portfolio with the cost of investing in other mutual funds.


The example assumes that you invest $10,000 in the Portfolio, your investment has a 5% return each year and that the Portfolio's operating expenses remain the same. Although your actual costs may be higher or lower, based on these assumptions your costs would be:

Strategy [Heading] rr_StrategyHeading Principal Investment Strategies
Strategy Narrative [Text Block] rr_StrategyNarrativeTextBlock

Under normal market conditions, the Adviser seeks to achieve the Portfolio's investment objective by investing primarily in established and emerging companies from a universe comprised of small capitalization companies, most with market capitalizations of generally less than $4 billion.


Under normal circumstances, at least 80% of the Portfolio's assets will be invested in equity securities of small capitalization companies. This policy may be changed without shareholder approval; however, you would be notified in writing of any changes. A company is considered to be a small capitalization company if it has a total market capitalization at the time of purchase of $4 billion or less.


The Adviser emphasizes a bottom-up stock selection process, seeking attractive investments on an individual company basis. In selecting securities for investment, the Adviser seeks to invest in high quality companies it believes have sustainable competitive advantages and the ability to redeploy capital at high rates of return. The Adviser typically favors companies with rising returns on invested capital, above average business visibility, strong free cash flow generation and an attractive risk/reward. The Adviser generally considers selling an investment when it determines the company no longer satisfies its investment criteria.


The Portfolio's equity investments may include common and preferred stocks, convertible securities and equity-linked securities, rights and warrants to purchase common stocks, depositary receipts, exchange-traded funds ("ETFs"), limited partnership interests and other specialty securities having equity features. The Portfolio may invest in privately placed and restricted securities.


The Adviser may invest up to 25% of the Portfolio's net assets in foreign securities, including emerging market securities, and securities classified as American Depositary Receipts ("ADRs"), Global Depositary Receipts ("GDRs"), American Depositary Shares ("ADSs") or Global Depositary Shares ("GDSs"), foreign U.S. dollar-denominated securities that are traded on a U.S. exchange or local shares of non-U.S. issuers.


The Portfolio may utilize foreign currency forward exchange contracts, which are derivatives, in connection with its investments in foreign securities.

Risk [Heading] rr_RiskHeading Principal Risks
Risk Narrative [Text Block] rr_RiskNarrativeTextBlock

There is no assurance that the Portfolio will achieve its investment objective and you can lose money investing in this Portfolio. The principal risks of investing in the Portfolio include:


•  Equity Securities. In general, prices of equity securities are more volatile than those of fixed income securities. The prices of equity securities fluctuate, and sometimes widely fluctuate, in response to activities specific to the issuer of the security as well as factors unrelated to the fundamental condition of the issuer, including general market, economic and political conditions. To the extent that the Portfolio invests in convertible securities, and the convertible security's investment value is greater than its conversion value, its price will be likely to increase when interest rates fall and decrease when interest rates rise. If the conversion value exceeds the investment value, the price of the convertible security will tend to fluctuate directly with the price of the underlying equity security.


•  Foreign and Emerging Market Securities. Investments in foreign markets entail special risks such as currency, political, economic and market risks. There also may be greater market volatility, less reliable financial information, higher transaction and custody costs, decreased market liquidity and less government and exchange regulation associated with investments in foreign markets. In addition, investments in certain foreign markets, which have historically been considered stable, may become more volatile and subject to increased risk due to ongoing developments and changing conditions in such markets. Moreover, the growing interconnectivity of global economies and financial markets has increased the probability that adverse developments and conditions in one country or region will affect the stability of economies and financial markets in other countries or regions. The risks of investing in emerging market countries are greater than risks associated with investments in foreign developed countries. In addition, the Portfolio's investments may be denominated in foreign currencies and therefore, to the extent unhedged, the value of the investment will fluctuate with the U.S. dollar exchange rates. To the extent hedged by use of foreign currency forward exchange contracts, the precise matching of foreign currency forward exchange contract amounts and the value of the securities involved will not generally be possible because the future value of such securities in foreign currencies will change as a consequence of market movements in the value of those securities between the date on which the contract is entered into and the date it matures. There is additional risk that such transactions reduce or preclude the opportunity for gain if the value of the currency should move in the direction opposite to the position taken and that foreign currency forward exchange contracts create exposure to currencies in which the Portfolio's securities are not denominated. The use of foreign currency forward exchange contracts involves the risk of loss from the insolvency or bankruptcy of the counterparty to the contract or the failure of the counterparty to make payments or otherwise comply with the terms of the contract.


•  Small Cap Companies. Investments in small cap companies may involve greater risks than those associated with larger, more established companies. The securities issued by small cap companies may be less liquid, and such companies may have more limited markets, financial resources and product lines, and may lack the depth of management of larger companies.


•  Privately Placed and Restricted Securities. The Portfolio's investments may also include privately placed securities, which are subject to resale restrictions. These securities will have the effect of increasing the level of Portfolio illiquidity to the extent the Portfolio may be unable to sell or transfer these securities due to restrictions on transfers or on the ability to find buyers interested in purchasing the securities. The illiquidity of the market, as well as the lack of publicly available information regarding these securities, may also adversely affect the ability to arrive at a fair value for certain securities at certain times and could make it difficult for the Portfolio to sell certain securities.


Shares of the Portfolio are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.

Risk Lose Money [Text] rr_RiskLoseMoney There is no assurance that the Portfolio will achieve its investment objective and you can lose money investing in this Portfolio.
Risk Not Insured Depository Institution [Text] rr_RiskNotInsuredDepositoryInstitution Shares of the Portfolio are not bank deposits and are not guaranteed or insured by the Federal Deposit Insurance Corporation or any other government agency.
Bar Chart and Performance Table [Heading] rr_BarChartAndPerformanceTableHeading Performance Information
Performance Narrative [Text Block] rr_PerformanceNarrativeTextBlock

The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio's Class I shares' performance from year-to-year and by showing how the Portfolio's average annual returns for the past one, five and 10 year periods compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time. The performance of the Class IS shares will differ because the Class IS shares have different ongoing fees. The Portfolio's past performance, before and after taxes, is not necessarily an indication of how the Portfolio will perform in the future. Updated performance information is available online at www.morganstanley.com/im.

Performance Information Illustrates Variability of Returns [Text] rr_PerformanceInformationIllustratesVariabilityOfReturns The bar chart and table below provide some indication of the risks of investing in the Portfolio by showing changes in the Portfolio's Class I shares' performance from year-to-year and by showing how the Portfolio's average annual returns for the past one, five and 10 year periods compare with those of a broad measure of market performance, as well as an index that represents a group of similar mutual funds, over time.
Performance Availability Website Address [Text] rr_PerformanceAvailabilityWebSiteAddress www.morganstanley.com/im
Performance Past Does Not Indicate Future [Text] rr_PerformancePastDoesNotIndicateFuture The Portfolio's past performance, before and after taxes, is not necessarily an indication of how the Portfolio will perform in the future.
Bar Chart [Heading] rr_BarChartHeading Annual Total Returns-Calendar Years (Class I)*
Bar Chart Footnotes [Text Block] rr_BarChartFootnotesTextBlock

High Quarter

 

6/30/09

   

25.00

%

 

Low Quarter

 

12/31/08

   

–23.08

%

 
Bar Chart Closing [Text Block] rr_BarChartClosingTextBlock

*  Class I shares are not offered in this Prospectus. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Class IS shares would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. The returns for Class IS shares are expected to be higher than the returns for Class I shares of the Portfolio as expenses of Class IS are estimated to be lower. Return information for the Portfolio's Class IS shares will be shown in future prospectuses offering the Portfolio's Class IS shares after the Portfolio's Class IS shares have a full calendar year of return information to report.

Bar Chart, Returns for Class Not Offered in Prospectus [Text] rr_BarChartReturnsForClassNotOfferedInProspectus Class I shares are not offered in this Prospectus.
Highest Quarterly Return, Label rr_HighestQuarterlyReturnLabel High Quarter
Highest Quarterly Return, Date rr_BarChartHighestQuarterlyReturnDate Jun. 30, 2009
Highest Quarterly Return rr_BarChartHighestQuarterlyReturn 25.00%
Lowest Quarterly Return, Label rr_LowestQuarterlyReturnLabel Low Quarter
Lowest Quarterly Return, Date rr_BarChartLowestQuarterlyReturnDate Dec. 31, 2008
Lowest Quarterly Return rr_BarChartLowestQuarterlyReturn (23.08%)
Index No Deduction for Fees, Expenses, Taxes [Text] rr_IndexNoDeductionForFeesExpensesTaxes (reflects no deduction for fees, expenses or taxes)
Performance Table Uses Highest Federal Rate rr_PerformanceTableUsesHighestFederalRate The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes.
Performance Table Not Relevant to Tax Deferred rr_PerformanceTableNotRelevantToTaxDeferred Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Portfolio shares through tax deferred arrangements such as 401(k) plans or individual retirement accounts.
Performance Table One Class of after Tax Shown [Text] rr_PerformanceTableOneClassOfAfterTaxShown After-tax returns for the Portfolio's Class IS shares will vary from Class I shares' returns.
Performance Table Explanation after Tax Higher rr_PerformanceTableExplanationAfterTaxHigher After-tax returns may be higher than before-tax returns due to an assumed benefit from capital losses that would have been realized had Portfolio shares been sold at the end of the relevant periods, as applicable.
Performance Table Closing [Text Block] rr_PerformanceTableClosingTextBlock

The after-tax returns shown in the table above are calculated using the historical highest individual federal marginal income tax rates during the period shown and do not reflect the impact of state and local taxes. After-tax returns for the Portfolio's Class IS shares will vary from Class I shares' returns. Actual after-tax returns depend on the investor's tax situation and may differ from those shown, and after-tax returns are not relevant to investors who hold their Portfolio shares through tax deferred arrangements such as 401(k) plans or individual retirement accounts. After-tax returns may be higher than before-tax returns due to an assumed benefit from capital losses that would have been realized had Portfolio shares been sold at the end of the relevant periods, as applicable.

Caption rr_AverageAnnualReturnCaption Average Annual Total Returns (for the calendar periods ended December 31, 2012)
Russell 2000® Growth Index (reflects no deduction for fees, expenses or taxes)
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Past One Year rr_AverageAnnualReturnYear01 14.59% [1]
Average Annual Returns, Past Five Years rr_AverageAnnualReturnYear05 3.49% [1]
Average Annual Returns, Past Ten Years rr_AverageAnnualReturnYear10 9.80% [1]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 6.74% [1]
Lipper Small-Cap Growth Funds Index (reflects no deduction for taxes)
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Past One Year rr_AverageAnnualReturnYear01 14.95% [2]
Average Annual Returns, Past Five Years rr_AverageAnnualReturnYear05 2.09% [2]
Average Annual Returns, Past Ten Years rr_AverageAnnualReturnYear10 8.56% [2]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.58% [2]
Class IS
 
Risk/Return: rr_RiskReturnAbstract  
Redemption Fee (as a percentage of Amount Redeemed) rr_RedemptionFeeOverRedemption (2.00%)
Advisory Fee rr_ManagementFeesOverAssets 0.90%
Distribution and/or Shareholder Service (12b-1) Fee rr_DistributionAndService12b1FeesOverAssets none
Other Expenses rr_OtherExpensesOverAssets 0.13% [3]
Total Annual Portfolio Operating Expenses rr_ExpensesOverAssets 1.03% [4]
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.05%) [4]
Total Annual Portfolio Operating Expenses After Fee Waiver and/or Expense Reimbursement rr_NetExpensesOverAssets 0.98% [4]
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 100
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 $ 312
Performance One Year or Less [Text] rr_PerformanceOneYearOrLess As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio.
Average Annual Returns, Past One Year rr_AverageAnnualReturnYear01    [5]
Average Annual Returns, Past Five Years rr_AverageAnnualReturnYear05    [5]
Average Annual Returns, Past Ten Years rr_AverageAnnualReturnYear10    [5]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception    [5]
CLASS I
 
Risk/Return: rr_RiskReturnAbstract  
Annual Return 2003 rr_AnnualReturn2003 44.13%
Annual Return 2004 rr_AnnualReturn2004 19.17%
Annual Return 2005 rr_AnnualReturn2005 13.55%
Annual Return 2006 rr_AnnualReturn2006 11.90%
Annual Return 2007 rr_AnnualReturn2007 3.04%
Annual Return 2008 rr_AnnualReturn2008 (41.84%)
Annual Return 2009 rr_AnnualReturn2009 47.92%
Annual Return 2010 rr_AnnualReturn2010 27.20%
Annual Return 2011 rr_AnnualReturn2011 (9.12%)
Annual Return 2012 rr_AnnualReturn2012 17.10%
Average Annual Returns, Past One Year rr_AverageAnnualReturnYear01 17.10% [5]
Average Annual Returns, Past Five Years rr_AverageAnnualReturnYear05 3.09% [5]
Average Annual Returns, Past Ten Years rr_AverageAnnualReturnYear10 10.10% [5]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 10.67% [5]
Average Annual Returns, Inception Date rr_AverageAnnualReturnInceptionDate Nov. 01, 1989 [5]
CLASS I | After Taxes on Distributions
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Past One Year rr_AverageAnnualReturnYear01 16.28% [5]
Average Annual Returns, Past Five Years rr_AverageAnnualReturnYear05 2.85% [5]
Average Annual Returns, Past Ten Years rr_AverageAnnualReturnYear10 9.53% [5]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.36% [5]
CLASS I | After Taxes on Distributions and Sale of Portfolio Shares
 
Risk/Return: rr_RiskReturnAbstract  
Average Annual Returns, Past One Year rr_AverageAnnualReturnYear01 12.06% [5]
Average Annual Returns, Past Five Years rr_AverageAnnualReturnYear05 2.62% [5]
Average Annual Returns, Past Ten Years rr_AverageAnnualReturnYear10 8.89% [5]
Average Annual Returns, Since Inception rr_AverageAnnualReturnSinceInception 8.19% [5]
[1] The Russell 2000® Growth Index measures the performance of the small-cap growth segment of the U.S. equity universe. It includes those Russell 2000® Index companies with higher price-to-book ratios and higher forecasted growth values. The Russell 2000® Index is a subset of the Russell 3000® Index representing approximately 10% of the total market capitalization of that index. It includes approximately 2,000 of the smallest securities based on a combination of their market capitalization and current index membership. It is not possible to invest directly in an index.
[2] The Lipper Small-Cap Growth Funds Index is an equally weighted performance index of the largest qualifying funds (based on net assets) in the Lipper Small-Cap Growth Funds classification. There are currently 30 funds represented in this Index.
[3] Other expenses have been estimated for the current fiscal year.
[4] The Portfolio's "Adviser," Morgan Stanley Investment Management Inc., has agreed to reduce its advisory fee and/or reimburse the Portfolio so that Total Annual Portfolio Operating Expenses, excluding certain investment related expenses, taxes, interest and other extraordinary expenses (including litigation), will not exceed 0.98% for Class IS. The fee waivers and/or expense reimbursements will continue for at least one year or until such time as the Board of Directors of Morgan Stanley Institutional Fund, Inc. (the "Fund") acts to discontinue all or a portion of such waivers and/or reimbursements when it deems such action is appropriate.
[5] Class I shares are not offered in this Prospectus. As of the date of this Prospectus, the Fund had not commenced offering Class IS shares of the Portfolio. Class IS shares would have substantially similar annual returns because the shares are invested in the same portfolio of securities and the annual returns would differ only to the extent that the Classes do not have the same expenses. The returns for Class IS shares are expected to be higher than the returns for Class I shares of the Portfolio as expenses of Class IS are estimated to be lower. Return information for the Portfolio's Class IS shares will be shown in future prospectuses offering the Portfolio's Class IS shares after the Portfolio's Class IS shares have a full calendar year of return information to report.