This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 10.6667px; font-weight: 400; grid-area: auto; line-height: 16px; margin: 0px; overflow: visible; text-align: left; text-align-last: auto; white-space-collapse: preserve-breaks;">www.morganstanley.com/im/shareholderreports</span>

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$64	1.17%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 64

Expense Ratio, Percent

1.17%

^[1]

AssetsNet

$ 229,067,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$229,067,075
# of Portfolio Holdings	33
Portfolio Turnover Rate	27%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.5%
Industrials	4.0%
Short-Term Investments	6.6%
Health Care	6.9%
Communication Services	9.2%
Financials	11.3%
Consumer, Cyclical	23.6%
Information Technology	36.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.6%
MicroStrategy, Inc.	6.0%
MercadoLibre, Inc.	6.0%
Tesla, Inc.	5.9%
DoorDash, Inc.	5.8%
ROBLOX Corp.	5.7%
Shopify, Inc.	5.4%
Crowdstrike Holdings, Inc.	4.7%
Snowflake, Inc.	4.7%
Royalty Pharma PLC	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155898

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Trading Symbol

MSPRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$105	1.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 105

Expense Ratio, Percent

1.93%

^[2]

AssetsNet

$ 229,067,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$229,067,075
# of Portfolio Holdings	33
Portfolio Turnover Rate	27%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.5%
Industrials	4.0%
Short-Term Investments	6.6%
Health Care	6.9%
Communication Services	9.2%
Financials	11.3%
Consumer, Cyclical	23.6%
Information Technology	36.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.6%
MicroStrategy, Inc.	6.0%
MercadoLibre, Inc.	6.0%
Tesla, Inc.	5.9%
DoorDash, Inc.	5.8%
ROBLOX Corp.	5.7%
Shopify, Inc.	5.4%
Crowdstrike Holdings, Inc.	4.7%
Snowflake, Inc.	4.7%
Royalty Pharma PLC	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085091

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Trading Symbol

MPAIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$46	0.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.84%

^[3]

AssetsNet

$ 229,067,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$229,067,075
# of Portfolio Holdings	33
Portfolio Turnover Rate	27%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.5%
Industrials	4.0%
Short-Term Investments	6.6%
Health Care	6.9%
Communication Services	9.2%
Financials	11.3%
Consumer, Cyclical	23.6%
Information Technology	36.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.6%
MicroStrategy, Inc.	6.0%
MercadoLibre, Inc.	6.0%
Tesla, Inc.	5.9%
DoorDash, Inc.	5.8%
ROBLOX Corp.	5.7%
Shopify, Inc.	5.4%
Crowdstrike Holdings, Inc.	4.7%
Snowflake, Inc.	4.7%
Royalty Pharma PLC	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085092

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Trading Symbol

MAPLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$54	0.98%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

0.98%

^[4]

AssetsNet

$ 229,067,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$229,067,075
# of Portfolio Holdings	33
Portfolio Turnover Rate	27%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.5%
Industrials	4.0%
Short-Term Investments	6.6%
Health Care	6.9%
Communication Services	9.2%
Financials	11.3%
Consumer, Cyclical	23.6%
Information Technology	36.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.6%
MicroStrategy, Inc.	6.0%
MercadoLibre, Inc.	6.0%
Tesla, Inc.	5.9%
DoorDash, Inc.	5.8%
ROBLOX Corp.	5.7%
Shopify, Inc.	5.4%
Crowdstrike Holdings, Inc.	4.7%
Snowflake, Inc.	4.7%
Royalty Pharma PLC	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126919

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio

Class Name

Trading Symbol

MADSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Advantage Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$44	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.80%

^[5]

AssetsNet

$ 229,067,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$229,067,075
# of Portfolio Holdings	33
Portfolio Turnover Rate	27%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.5%
Industrials	4.0%
Short-Term Investments	6.6%
Health Care	6.9%
Communication Services	9.2%
Financials	11.3%
Consumer, Cyclical	23.6%
Information Technology	36.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.6%
MicroStrategy, Inc.	6.0%
MercadoLibre, Inc.	6.0%
Tesla, Inc.	5.9%
DoorDash, Inc.	5.8%
ROBLOX Corp.	5.7%
Shopify, Inc.	5.4%
Crowdstrike Holdings, Inc.	4.7%
Snowflake, Inc.	4.7%
Royalty Pharma PLC	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236926

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio

Class Name

Trading Symbol

MSCUX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$53	1.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

1.05%

^[6]

AssetsNet

$ 1,364,777

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,364,777
# of Portfolio Holdings	30
Portfolio Turnover Rate	30%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Investment Company	2.1%
Communication Services	5.1%
Consumer Discretionary	6.8%
Consumer Staples	9.6%
Health Care	10.7%
Industrials	11.3%
Information Technology	26.9%
Financials	27.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.0%
Visa, Inc.	6.0%
Alphabet, Inc.	5.2%
Texas Instruments, Inc.	4.7%
Aon PLC	4.5%
Coca-Cola Co.	4.4%
Roper Technologies, Inc.	4.0%
Booking Holdings, Inc.	3.9%
Intercontinental Exchange, Inc.	3.9%
Accenture PLC	3.9%
Total	49.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236923

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio

Class Name

Trading Symbol

MSBWX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$91	1.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 91

Expense Ratio, Percent

1.80%

^[7]

AssetsNet

$ 1,364,777

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,364,777
# of Portfolio Holdings	30
Portfolio Turnover Rate	30%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Investment Company	2.1%
Communication Services	5.1%
Consumer Discretionary	6.8%
Consumer Staples	9.6%
Health Care	10.7%
Industrials	11.3%
Information Technology	26.9%
Financials	27.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.0%
Visa, Inc.	6.0%
Alphabet, Inc.	5.2%
Texas Instruments, Inc.	4.7%
Aon PLC	4.5%
Coca-Cola Co.	4.4%
Roper Technologies, Inc.	4.0%
Booking Holdings, Inc.	3.9%
Intercontinental Exchange, Inc.	3.9%
Accenture PLC	3.9%
Total	49.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236924

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio

Class Name

Trading Symbol

MSBVX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$35	0.70%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 35

Expense Ratio, Percent

0.70%

^[8]

AssetsNet

$ 1,364,777

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,364,777
# of Portfolio Holdings	30
Portfolio Turnover Rate	30%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Investment Company	2.1%
Communication Services	5.1%
Consumer Discretionary	6.8%
Consumer Staples	9.6%
Health Care	10.7%
Industrials	11.3%
Information Technology	26.9%
Financials	27.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.0%
Visa, Inc.	6.0%
Alphabet, Inc.	5.2%
Texas Instruments, Inc.	4.7%
Aon PLC	4.5%
Coca-Cola Co.	4.4%
Roper Technologies, Inc.	4.0%
Booking Holdings, Inc.	3.9%
Intercontinental Exchange, Inc.	3.9%
Accenture PLC	3.9%
Total	49.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236925

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio

Class Name

Trading Symbol

MSBQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - American Resilience Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$33	0.65%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 33

Expense Ratio, Percent

0.65%

^[9]

AssetsNet

$ 1,364,777

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

30.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,364,777
# of Portfolio Holdings	30
Portfolio Turnover Rate	30%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Investment Company	2.1%
Communication Services	5.1%
Consumer Discretionary	6.8%
Consumer Staples	9.6%
Health Care	10.7%
Industrials	11.3%
Information Technology	26.9%
Financials	27.5%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.0%
Visa, Inc.	6.0%
Alphabet, Inc.	5.2%
Texas Instruments, Inc.	4.7%
Aon PLC	4.5%
Coca-Cola Co.	4.4%
Roper Technologies, Inc.	4.0%
Booking Holdings, Inc.	3.9%
Intercontinental Exchange, Inc.	3.9%
Accenture PLC	3.9%
Total	49.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163121

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Trading Symbol

MSAUX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$73	1.42%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 73

Expense Ratio, Percent

1.42%

^[10]

AssetsNet

$ 127,671,114

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$127,671,114
# of Portfolio Holdings	33
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Hong Kong	2.9%
United States	3.4%
Singapore	4.4%
Taiwan	5.3%
Korea, Republic of	15.8%
India	27.3%
China	40.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Coupang, Inc.	7.9%
ICICI Bank Ltd.	7.1%
Trip.com Group Ltd.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.3%
HDFC Bank Ltd.	5.0%
Eternal Ltd.	4.8%
Tencent Holdings Ltd.	4.6%
Full Truck Alliance Co. Ltd.	4.4%
Grab Holdings Ltd.	4.4%
Meituan	4.3%
Total	54.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163122

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Trading Symbol

MSAWX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$113	2.19%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 113

Expense Ratio, Percent

2.19%

^[11]

AssetsNet

$ 127,671,114

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$127,671,114
# of Portfolio Holdings	33
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Hong Kong	2.9%
United States	3.4%
Singapore	4.4%
Taiwan	5.3%
Korea, Republic of	15.8%
India	27.3%
China	40.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Coupang, Inc.	7.9%
ICICI Bank Ltd.	7.1%
Trip.com Group Ltd.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.3%
HDFC Bank Ltd.	5.0%
Eternal Ltd.	4.8%
Tencent Holdings Ltd.	4.6%
Full Truck Alliance Co. Ltd.	4.4%
Grab Holdings Ltd.	4.4%
Meituan	4.3%
Total	54.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163120

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Trading Symbol

MSAQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$56	1.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.09%

^[12]

AssetsNet

$ 127,671,114

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$127,671,114
# of Portfolio Holdings	33
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Hong Kong	2.9%
United States	3.4%
Singapore	4.4%
Taiwan	5.3%
Korea, Republic of	15.8%
India	27.3%
China	40.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Coupang, Inc.	7.9%
ICICI Bank Ltd.	7.1%
Trip.com Group Ltd.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.3%
HDFC Bank Ltd.	5.0%
Eternal Ltd.	4.8%
Tencent Holdings Ltd.	4.6%
Full Truck Alliance Co. Ltd.	4.4%
Grab Holdings Ltd.	4.4%
Meituan	4.3%
Total	54.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000163123

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio

Class Name

Trading Symbol

MSAYX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Asia Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$54	1.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.04%

^[13]

AssetsNet

$ 127,671,114

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$127,671,114
# of Portfolio Holdings	33
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Hong Kong	2.9%
United States	3.4%
Singapore	4.4%
Taiwan	5.3%
Korea, Republic of	15.8%
India	27.3%
China	40.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Coupang, Inc.	7.9%
ICICI Bank Ltd.	7.1%
Trip.com Group Ltd.	6.4%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.3%
HDFC Bank Ltd.	5.0%
Eternal Ltd.	4.8%
Tencent Holdings Ltd.	4.6%
Full Truck Alliance Co. Ltd.	4.4%
Grab Holdings Ltd.	4.4%
Meituan	4.3%
Total	54.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216355

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Trading Symbol

MDOAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$80	1.52%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 80

Expense Ratio, Percent

1.52%

^[14]

AssetsNet

$ 42,326,129

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$42,326,129
# of Portfolio Holdings	32
Portfolio Turnover Rate	34%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Poland	1.2%
Singapore	3.6%
Taiwan	5.2%
Brazil	8.0%
United States	12.6%
Korea, Republic of	13.2%
India	25.2%
China	31.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	8.4%
Coupang, Inc.	6.4%
ICICI Bank Ltd.	6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.2%
HDFC Bank Ltd.	4.7%
Trip.com Group Ltd.	4.7%
NU Holdings Ltd.	4.6%
Eternal Ltd.	4.6%
Meituan	4.2%
Tencent Holdings Ltd.	4.0%
Total	52.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216357

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Trading Symbol

MDOBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$120	2.27%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 120

Expense Ratio, Percent

2.27%

^[15]

AssetsNet

$ 42,326,129

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$42,326,129
# of Portfolio Holdings	32
Portfolio Turnover Rate	34%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Poland	1.2%
Singapore	3.6%
Taiwan	5.2%
Brazil	8.0%
United States	12.6%
Korea, Republic of	13.2%
India	25.2%
China	31.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	8.4%
Coupang, Inc.	6.4%
ICICI Bank Ltd.	6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.2%
HDFC Bank Ltd.	4.7%
Trip.com Group Ltd.	4.7%
NU Holdings Ltd.	4.6%
Eternal Ltd.	4.6%
Meituan	4.2%
Tencent Holdings Ltd.	4.0%
Total	52.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216354

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Trading Symbol

MDOEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$62	1.17%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 62

Expense Ratio, Percent

1.17%

^[16]

AssetsNet

$ 42,326,129

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$42,326,129
# of Portfolio Holdings	32
Portfolio Turnover Rate	34%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Poland	1.2%
Singapore	3.6%
Taiwan	5.2%
Brazil	8.0%
United States	12.6%
Korea, Republic of	13.2%
India	25.2%
China	31.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	8.4%
Coupang, Inc.	6.4%
ICICI Bank Ltd.	6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.2%
HDFC Bank Ltd.	4.7%
Trip.com Group Ltd.	4.7%
NU Holdings Ltd.	4.6%
Eternal Ltd.	4.6%
Meituan	4.2%
Tencent Holdings Ltd.	4.0%
Total	52.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216356

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio

Class Name

Trading Symbol

MDODX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Developing Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$59	1.12%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 59

Expense Ratio, Percent

1.12%

^[17]

AssetsNet

$ 42,326,129

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

34.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$42,326,129
# of Portfolio Holdings	32
Portfolio Turnover Rate	34%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Poland	1.2%
Singapore	3.6%
Taiwan	5.2%
Brazil	8.0%
United States	12.6%
Korea, Republic of	13.2%
India	25.2%
China	31.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	8.4%
Coupang, Inc.	6.4%
ICICI Bank Ltd.	6.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.2%
HDFC Bank Ltd.	4.7%
Trip.com Group Ltd.	4.7%
NU Holdings Ltd.	4.6%
Eternal Ltd.	4.6%
Meituan	4.2%
Tencent Holdings Ltd.	4.0%
Total	52.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236912

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets ex China Portfolio

Class Name

Trading Symbol

MSDQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets ex China Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$71	1.35%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.35%

^[18]

AssetsNet

$ 7,891,789

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

9.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$7,891,789
# of Portfolio Holdings	76
Portfolio Turnover Rate	9%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	6.2%
United Kingdom	1.5%
Sweden	1.7%
Poland	4.0%
United States	4.1%
Mexico	4.6%
South Africa	5.1%
Brazil	5.3%
Korea, Republic of	10.5%
Taiwan	25.3%
India	31.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	17.0%
Samsung Electronics Co. Ltd.	5.7%
HDFC Bank Ltd.	3.0%
ICICI Bank Ltd.	3.0%
Reliance Industries Ltd.	2.8%
Mahindra & Mahindra Ltd.	2.7%
Capitec Bank Holdings Ltd.	2.2%
KB Financial Group, Inc.	2.1%
Grupa Kety SA	2.0%
Hon Hai Precision Industry Co. Ltd.	1.8%
Total	42.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236913

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets ex China Portfolio

Class Name

Trading Symbol

MSDOX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$111	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 111

Expense Ratio, Percent

2.10%

^[19]

AssetsNet

$ 7,891,789

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

9.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$7,891,789
# of Portfolio Holdings	76
Portfolio Turnover Rate	9%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	6.2%
United Kingdom	1.5%
Sweden	1.7%
Poland	4.0%
United States	4.1%
Mexico	4.6%
South Africa	5.1%
Brazil	5.3%
Korea, Republic of	10.5%
Taiwan	25.3%
India	31.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	17.0%
Samsung Electronics Co. Ltd.	5.7%
HDFC Bank Ltd.	3.0%
ICICI Bank Ltd.	3.0%
Reliance Industries Ltd.	2.8%
Mahindra & Mahindra Ltd.	2.7%
Capitec Bank Holdings Ltd.	2.2%
KB Financial Group, Inc.	2.1%
Grupa Kety SA	2.0%
Hon Hai Precision Industry Co. Ltd.	1.8%
Total	42.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236914

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets ex China Portfolio

Class Name

Trading Symbol

MSDUX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$52	0.98%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.98%

^[20]

AssetsNet

$ 7,891,789

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

9.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$7,891,789
# of Portfolio Holdings	76
Portfolio Turnover Rate	9%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	6.2%
United Kingdom	1.5%
Sweden	1.7%
Poland	4.0%
United States	4.1%
Mexico	4.6%
South Africa	5.1%
Brazil	5.3%
Korea, Republic of	10.5%
Taiwan	25.3%
India	31.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	17.0%
Samsung Electronics Co. Ltd.	5.7%
HDFC Bank Ltd.	3.0%
ICICI Bank Ltd.	3.0%
Reliance Industries Ltd.	2.8%
Mahindra & Mahindra Ltd.	2.7%
Capitec Bank Holdings Ltd.	2.2%
KB Financial Group, Inc.	2.1%
Grupa Kety SA	2.0%
Hon Hai Precision Industry Co. Ltd.	1.8%
Total	42.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236911

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets ex China Portfolio

Class Name

Trading Symbol

MSDMX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$50	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

0.95%

^[21]

AssetsNet

$ 7,891,789

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

9.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$7,891,789
# of Portfolio Holdings	76
Portfolio Turnover Rate	9%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	6.2%
United Kingdom	1.5%
Sweden	1.7%
Poland	4.0%
United States	4.1%
Mexico	4.6%
South Africa	5.1%
Brazil	5.3%
Korea, Republic of	10.5%
Taiwan	25.3%
India	31.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	17.0%
Samsung Electronics Co. Ltd.	5.7%
HDFC Bank Ltd.	3.0%
ICICI Bank Ltd.	3.0%
Reliance Industries Ltd.	2.8%
Mahindra & Mahindra Ltd.	2.7%
Capitec Bank Holdings Ltd.	2.2%
KB Financial Group, Inc.	2.1%
Grupa Kety SA	2.0%
Hon Hai Precision Industry Co. Ltd.	1.8%
Total	42.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000149048

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Trading Symbol

MELAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$69	1.34%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 69

Expense Ratio, Percent

1.34%

^[22]

AssetsNet

$ 155,349,655

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$155,349,655
# of Portfolio Holdings	37
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Greece	0.4%
United Arab Emirates	0.4%
Singapore	3.1%
Korea, Republic of	3.9%
Mexico	5.5%
Taiwan	12.8%
United States	13.1%
Brazil	13.9%
India	46.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	7.7%
MercadoLibre, Inc.	6.8%
Localiza Rent a Car SA	6.2%
HDFC Bank Ltd.	5.4%
Grupo Financiero Banorte SAB de CV	5.3%
ICICI Bank Ltd.	5.0%
Bharti Airtel Ltd.	4.9%
KEI Industries Ltd.	4.5%
Varun Beverages Ltd.	4.4%
XP, Inc.	3.9%
Total	54.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155912

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Trading Symbol

MEMLX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$108	2.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 108

Expense Ratio, Percent

2.09%

^[23]

AssetsNet

$ 155,349,655

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$155,349,655
# of Portfolio Holdings	37
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Greece	0.4%
United Arab Emirates	0.4%
Singapore	3.1%
Korea, Republic of	3.9%
Mexico	5.5%
Taiwan	12.8%
United States	13.1%
Brazil	13.9%
India	46.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	7.7%
MercadoLibre, Inc.	6.8%
Localiza Rent a Car SA	6.2%
HDFC Bank Ltd.	5.4%
Grupo Financiero Banorte SAB de CV	5.3%
ICICI Bank Ltd.	5.0%
Bharti Airtel Ltd.	4.9%
KEI Industries Ltd.	4.5%
Varun Beverages Ltd.	4.4%
XP, Inc.	3.9%
Total	54.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000149047

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Trading Symbol

MELIX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$51	0.98%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.98%

^[24]

AssetsNet

$ 155,349,655

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$155,349,655
# of Portfolio Holdings	37
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Greece	0.4%
United Arab Emirates	0.4%
Singapore	3.1%
Korea, Republic of	3.9%
Mexico	5.5%
Taiwan	12.8%
United States	13.1%
Brazil	13.9%
India	46.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	7.7%
MercadoLibre, Inc.	6.8%
Localiza Rent a Car SA	6.2%
HDFC Bank Ltd.	5.4%
Grupo Financiero Banorte SAB de CV	5.3%
ICICI Bank Ltd.	5.0%
Bharti Airtel Ltd.	4.9%
KEI Industries Ltd.	4.5%
Varun Beverages Ltd.	4.4%
XP, Inc.	3.9%
Total	54.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000226932

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Trading Symbol

MSIWX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$49	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.94%

^[25]

AssetsNet

$ 155,349,655

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$155,349,655
# of Portfolio Holdings	37
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Greece	0.4%
United Arab Emirates	0.4%
Singapore	3.1%
Korea, Republic of	3.9%
Mexico	5.5%
Taiwan	12.8%
United States	13.1%
Brazil	13.9%
India	46.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	7.7%
MercadoLibre, Inc.	6.8%
Localiza Rent a Car SA	6.2%
HDFC Bank Ltd.	5.4%
Grupo Financiero Banorte SAB de CV	5.3%
ICICI Bank Ltd.	5.0%
Bharti Airtel Ltd.	4.9%
KEI Industries Ltd.	4.5%
Varun Beverages Ltd.	4.4%
XP, Inc.	3.9%
Total	54.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000149050

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Leaders Portfolio

Class Name

Trading Symbol

MELSX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$49	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.94%

^[26]

AssetsNet

$ 155,349,655

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

29.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$155,349,655
# of Portfolio Holdings	37
Portfolio Turnover Rate	29%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Greece	0.4%
United Arab Emirates	0.4%
Singapore	3.1%
Korea, Republic of	3.9%
Mexico	5.5%
Taiwan	12.8%
United States	13.1%
Brazil	13.9%
India	46.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	7.7%
MercadoLibre, Inc.	6.8%
Localiza Rent a Car SA	6.2%
HDFC Bank Ltd.	5.4%
Grupo Financiero Banorte SAB de CV	5.3%
ICICI Bank Ltd.	5.0%
Bharti Airtel Ltd.	4.9%
KEI Industries Ltd.	4.5%
Varun Beverages Ltd.	4.4%
XP, Inc.	3.9%
Total	54.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007747

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Trading Symbol

MMKBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$72	1.35%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 72

Expense Ratio, Percent

1.35%

^[27]

AssetsNet

$ 566,714,105

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$566,714,105
# of Portfolio Holdings	93
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	4.0%
Saudi Arabia	1.4%
Poland	2.8%
South Africa	3.3%
United States	4.1%
Mexico	4.9%
Brazil	5.1%
Korea, Republic of	8.3%
Taiwan	20.0%
China	21.8%
India	24.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	12.7%
Tencent Holdings Ltd.	5.1%
Samsung Electronics Co. Ltd.	4.4%
China Construction Bank Corp.	2.5%
Alibaba Group Holding Ltd.	2.4%
Reliance Industries Ltd.	2.2%
ICICI Bank Ltd.	2.1%
BYD Co. Ltd.	1.9%
HDFC Bank Ltd.	1.8%
WEG SA	1.6%
Total	36.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155890

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Trading Symbol

MSEPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$111	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 111

Expense Ratio, Percent

2.10%

^[28]

AssetsNet

$ 566,714,105

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$566,714,105
# of Portfolio Holdings	93
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	4.0%
Saudi Arabia	1.4%
Poland	2.8%
South Africa	3.3%
United States	4.1%
Mexico	4.9%
Brazil	5.1%
Korea, Republic of	8.3%
Taiwan	20.0%
China	21.8%
India	24.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	12.7%
Tencent Holdings Ltd.	5.1%
Samsung Electronics Co. Ltd.	4.4%
China Construction Bank Corp.	2.5%
Alibaba Group Holding Ltd.	2.4%
Reliance Industries Ltd.	2.2%
ICICI Bank Ltd.	2.1%
BYD Co. Ltd.	1.9%
HDFC Bank Ltd.	1.8%
WEG SA	1.6%
Total	36.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007746

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Trading Symbol

MGEMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$53	0.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

0.99%

^[29]

AssetsNet

$ 566,714,105

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$566,714,105
# of Portfolio Holdings	93
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	4.0%
Saudi Arabia	1.4%
Poland	2.8%
South Africa	3.3%
United States	4.1%
Mexico	4.9%
Brazil	5.1%
Korea, Republic of	8.3%
Taiwan	20.0%
China	21.8%
India	24.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	12.7%
Tencent Holdings Ltd.	5.1%
Samsung Electronics Co. Ltd.	4.4%
China Construction Bank Corp.	2.5%
Alibaba Group Holding Ltd.	2.4%
Reliance Industries Ltd.	2.2%
ICICI Bank Ltd.	2.1%
BYD Co. Ltd.	1.9%
HDFC Bank Ltd.	1.8%
WEG SA	1.6%
Total	36.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198815

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Trading Symbol

MRGEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$51	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.95%

^[30]

AssetsNet

$ 566,714,105

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$566,714,105
# of Portfolio Holdings	93
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	4.0%
Saudi Arabia	1.4%
Poland	2.8%
South Africa	3.3%
United States	4.1%
Mexico	4.9%
Brazil	5.1%
Korea, Republic of	8.3%
Taiwan	20.0%
China	21.8%
India	24.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	12.7%
Tencent Holdings Ltd.	5.1%
Samsung Electronics Co. Ltd.	4.4%
China Construction Bank Corp.	2.5%
Alibaba Group Holding Ltd.	2.4%
Reliance Industries Ltd.	2.2%
ICICI Bank Ltd.	2.1%
BYD Co. Ltd.	1.9%
HDFC Bank Ltd.	1.8%
WEG SA	1.6%
Total	36.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113803

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Trading Symbol

MSELX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$98	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 98

Expense Ratio, Percent

1.85%

^[31]

AssetsNet

$ 566,714,105

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$566,714,105
# of Portfolio Holdings	93
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	4.0%
Saudi Arabia	1.4%
Poland	2.8%
South Africa	3.3%
United States	4.1%
Mexico	4.9%
Brazil	5.1%
Korea, Republic of	8.3%
Taiwan	20.0%
China	21.8%
India	24.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	12.7%
Tencent Holdings Ltd.	5.1%
Samsung Electronics Co. Ltd.	4.4%
China Construction Bank Corp.	2.5%
Alibaba Group Holding Ltd.	2.4%
Reliance Industries Ltd.	2.2%
ICICI Bank Ltd.	2.1%
BYD Co. Ltd.	1.9%
HDFC Bank Ltd.	1.8%
WEG SA	1.6%
Total	36.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126912

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio

Class Name

Trading Symbol

MMMPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$51	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.95%

^[32]

AssetsNet

$ 566,714,105

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

16.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$566,714,105
# of Portfolio Holdings	93
Portfolio Turnover Rate	16%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	4.0%
Saudi Arabia	1.4%
Poland	2.8%
South Africa	3.3%
United States	4.1%
Mexico	4.9%
Brazil	5.1%
Korea, Republic of	8.3%
Taiwan	20.0%
China	21.8%
India	24.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	12.7%
Tencent Holdings Ltd.	5.1%
Samsung Electronics Co. Ltd.	4.4%
China Construction Bank Corp.	2.5%
Alibaba Group Holding Ltd.	2.4%
Reliance Industries Ltd.	2.2%
ICICI Bank Ltd.	2.1%
BYD Co. Ltd.	1.9%
HDFC Bank Ltd.	1.8%
WEG SA	1.6%
Total	36.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169209

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Trading Symbol

MLNAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$68	1.29%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 68

Expense Ratio, Percent

1.29%

^[33]

AssetsNet

$ 296,450,224

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$296,450,224
# of Portfolio Holdings	21
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Real Estate	4.6%
Consumer Staples	5.6%
Materials	5.9%
Industrials	6.0%
Consumer Discretionary	7.4%
Communication Services	14.5%
Information Technology	23.0%
Financials	31.1%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	9.8%
Netflix, Inc.	7.7%
Microsoft Corp.	7.0%
Tencent Holdings Ltd.	6.8%
Progressive Corp.	6.5%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.2%
CRH PLC	5.9%
Ferrari NV	5.8%
Costco Wholesale Corp.	5.6%
JPMorgan Chase & Co.	5.4%
Total	66.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169210

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Trading Symbol

MLNCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$107	2.04%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 107

Expense Ratio, Percent

2.04%

^[34]

AssetsNet

$ 296,450,224

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$296,450,224
# of Portfolio Holdings	21
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Real Estate	4.6%
Consumer Staples	5.6%
Materials	5.9%
Industrials	6.0%
Consumer Discretionary	7.4%
Communication Services	14.5%
Information Technology	23.0%
Financials	31.1%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	9.8%
Netflix, Inc.	7.7%
Microsoft Corp.	7.0%
Tencent Holdings Ltd.	6.8%
Progressive Corp.	6.5%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.2%
CRH PLC	5.9%
Ferrari NV	5.8%
Costco Wholesale Corp.	5.6%
JPMorgan Chase & Co.	5.4%
Total	66.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169208

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Trading Symbol

MLNIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$52	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

1.00%

^[35]

AssetsNet

$ 296,450,224

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$296,450,224
# of Portfolio Holdings	21
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Real Estate	4.6%
Consumer Staples	5.6%
Materials	5.9%
Industrials	6.0%
Consumer Discretionary	7.4%
Communication Services	14.5%
Information Technology	23.0%
Financials	31.1%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	9.8%
Netflix, Inc.	7.7%
Microsoft Corp.	7.0%
Tencent Holdings Ltd.	6.8%
Progressive Corp.	6.5%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.2%
CRH PLC	5.9%
Ferrari NV	5.8%
Costco Wholesale Corp.	5.6%
JPMorgan Chase & Co.	5.4%
Total	66.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169211

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio

Class Name

Trading Symbol

MLNSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Concentrated Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$50	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

0.95%

^[36]

AssetsNet

$ 296,450,224

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

26.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$296,450,224
# of Portfolio Holdings	21
Portfolio Turnover Rate	26%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Real Estate	4.6%
Consumer Staples	5.6%
Materials	5.9%
Industrials	6.0%
Consumer Discretionary	7.4%
Communication Services	14.5%
Information Technology	23.0%
Financials	31.1%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	9.8%
Netflix, Inc.	7.7%
Microsoft Corp.	7.0%
Tencent Holdings Ltd.	6.8%
Progressive Corp.	6.5%
Taiwan Semiconductor Manufacturing Co. Ltd.	6.2%
CRH PLC	5.9%
Ferrari NV	5.8%
Costco Wholesale Corp.	5.6%
JPMorgan Chase & Co.	5.4%
Total	66.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169213

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Trading Symbol

MLMAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$68	1.32%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 68

Expense Ratio, Percent

1.32%

^[37]

AssetsNet

$ 44,311,480

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$44,311,480
# of Portfolio Holdings	43
Portfolio Turnover Rate	22%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Consumer Staples	0.8%
Energy	1.7%
Real Estate	2.9%
Industrials	5.5%
Materials	5.8%
Communication Services	11.4%
Consumer Discretionary	20.5%
Information Technology	21.7%
Financials	29.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	6.6%
Ferrari NV	6.0%
CRH PLC	5.5%
JPMorgan Chase & Co.	5.5%
Ameriprise Financial, Inc.	5.2%
Taiwan Semiconductor Manufacturing Co. Ltd.	4.9%
Microsoft Corp.	4.4%
Apple, Inc.	4.3%
Netflix, Inc.	4.3%
Amazon.com, Inc.	3.9%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169214

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Trading Symbol

MLMCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$108	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 108

Expense Ratio, Percent

2.10%

^[38]

AssetsNet

$ 44,311,480

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$44,311,480
# of Portfolio Holdings	43
Portfolio Turnover Rate	22%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Consumer Staples	0.8%
Energy	1.7%
Real Estate	2.9%
Industrials	5.5%
Materials	5.8%
Communication Services	11.4%
Consumer Discretionary	20.5%
Information Technology	21.7%
Financials	29.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	6.6%
Ferrari NV	6.0%
CRH PLC	5.5%
JPMorgan Chase & Co.	5.5%
Ameriprise Financial, Inc.	5.2%
Taiwan Semiconductor Manufacturing Co. Ltd.	4.9%
Microsoft Corp.	4.4%
Apple, Inc.	4.3%
Netflix, Inc.	4.3%
Amazon.com, Inc.	3.9%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169212

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Trading Symbol

MLMIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$51	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

1.00%

^[39]

AssetsNet

$ 44,311,480

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$44,311,480
# of Portfolio Holdings	43
Portfolio Turnover Rate	22%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Consumer Staples	0.8%
Energy	1.7%
Real Estate	2.9%
Industrials	5.5%
Materials	5.8%
Communication Services	11.4%
Consumer Discretionary	20.5%
Information Technology	21.7%
Financials	29.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	6.6%
Ferrari NV	6.0%
CRH PLC	5.5%
JPMorgan Chase & Co.	5.5%
Ameriprise Financial, Inc.	5.2%
Taiwan Semiconductor Manufacturing Co. Ltd.	4.9%
Microsoft Corp.	4.4%
Apple, Inc.	4.3%
Netflix, Inc.	4.3%
Amazon.com, Inc.	3.9%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169215

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio

Class Name

Trading Symbol

MLMSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$49	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.95%

^[40]

AssetsNet

$ 44,311,480

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

22.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$44,311,480
# of Portfolio Holdings	43
Portfolio Turnover Rate	22%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Consumer Staples	0.8%
Energy	1.7%
Real Estate	2.9%
Industrials	5.5%
Materials	5.8%
Communication Services	11.4%
Consumer Discretionary	20.5%
Information Technology	21.7%
Financials	29.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	6.6%
Ferrari NV	6.0%
CRH PLC	5.5%
JPMorgan Chase & Co.	5.5%
Ameriprise Financial, Inc.	5.2%
Taiwan Semiconductor Manufacturing Co. Ltd.	4.9%
Microsoft Corp.	4.4%
Apple, Inc.	4.3%
Netflix, Inc.	4.3%
Amazon.com, Inc.	3.9%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204518

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Trading Symbol

MSJAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$71	1.36%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.36%

^[41]

AssetsNet

$ 29,628,396

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

104.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$29,628,396
# of Portfolio Holdings	34
Portfolio Turnover Rate	104%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.0%
Financials	1.9%
Short-Term Investments	2.5%
Energy	2.5%
Industrials	10.4%
Information Technology	20.2%
Health Care	28.6%
Consumer Discretionary	32.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Victoria PLC	11.8%
Appian Corp.	9.6%
Domino's Pizza Group PLC	4.8%
HCA Healthcare, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
QXO, Inc.	4.3%
Arbutus Biopharma Corp.	4.2%
Roivant Sciences Ltd.	4.1%
Core Scientific, Inc.	4.1%
Carvana Co.	3.6%
Total	55.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204519

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Trading Symbol

MSJCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$110	2.12%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 110

Expense Ratio, Percent

2.12%

^[42]

AssetsNet

$ 29,628,396

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

104.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$29,628,396
# of Portfolio Holdings	34
Portfolio Turnover Rate	104%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.0%
Financials	1.9%
Short-Term Investments	2.5%
Energy	2.5%
Industrials	10.4%
Information Technology	20.2%
Health Care	28.6%
Consumer Discretionary	32.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Victoria PLC	11.8%
Appian Corp.	9.6%
Domino's Pizza Group PLC	4.8%
HCA Healthcare, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
QXO, Inc.	4.3%
Arbutus Biopharma Corp.	4.2%
Roivant Sciences Ltd.	4.1%
Core Scientific, Inc.	4.1%
Carvana Co.	3.6%
Total	55.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204520

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Trading Symbol

MSJIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$53	1.01%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

1.01%

^[43]

AssetsNet

$ 29,628,396

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

104.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$29,628,396
# of Portfolio Holdings	34
Portfolio Turnover Rate	104%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.0%
Financials	1.9%
Short-Term Investments	2.5%
Energy	2.5%
Industrials	10.4%
Information Technology	20.2%
Health Care	28.6%
Consumer Discretionary	32.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Victoria PLC	11.8%
Appian Corp.	9.6%
Domino's Pizza Group PLC	4.8%
HCA Healthcare, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
QXO, Inc.	4.3%
Arbutus Biopharma Corp.	4.2%
Roivant Sciences Ltd.	4.1%
Core Scientific, Inc.	4.1%
Carvana Co.	3.6%
Total	55.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000204517

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio

Class Name

Trading Symbol

MSJSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Endurance Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$51	0.97%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.97%

^[44]

AssetsNet

$ 29,628,396

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

104.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$29,628,396
# of Portfolio Holdings	34
Portfolio Turnover Rate	104%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Real Estate	1.0%
Financials	1.9%
Short-Term Investments	2.5%
Energy	2.5%
Industrials	10.4%
Information Technology	20.2%
Health Care	28.6%
Consumer Discretionary	32.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Victoria PLC	11.8%
Appian Corp.	9.6%
Domino's Pizza Group PLC	4.8%
HCA Healthcare, Inc.	4.7%
Floor & Decor Holdings, Inc.	4.7%
QXO, Inc.	4.3%
Arbutus Biopharma Corp.	4.2%
Roivant Sciences Ltd.	4.1%
Core Scientific, Inc.	4.1%
Carvana Co.	3.6%
Total	55.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007755

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Trading Symbol

MSFBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$61	1.19%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.19%

^[45]

AssetsNet

$ 2,689,245,443

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,689,245,443
# of Portfolio Holdings	35
Portfolio Turnover Rate	14%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.7%
Communication Services	3.6%
Consumer Discretionary	6.6%
Health Care	11.6%
Industrials	12.5%
Consumer Staples	12.7%
Financials	24.6%
Information Technology	26.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.5%
SAP SE	7.9%
Visa, Inc.	6.4%
L'Oreal SA	4.7%
Aon PLC	4.2%
Coca-Cola Co.	3.7%
Booking Holdings, Inc.	3.6%
Alphabet, Inc.	3.6%
RELX PLC	3.5%
Accenture PLC	3.5%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155893

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Trading Symbol

MSGFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$99	1.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 99

Expense Ratio, Percent

1.93%

^[46]

AssetsNet

$ 2,689,245,443

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,689,245,443
# of Portfolio Holdings	35
Portfolio Turnover Rate	14%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.7%
Communication Services	3.6%
Consumer Discretionary	6.6%
Health Care	11.6%
Industrials	12.5%
Consumer Staples	12.7%
Financials	24.6%
Information Technology	26.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.5%
SAP SE	7.9%
Visa, Inc.	6.4%
L'Oreal SA	4.7%
Aon PLC	4.2%
Coca-Cola Co.	3.7%
Booking Holdings, Inc.	3.6%
Alphabet, Inc.	3.6%
RELX PLC	3.5%
Accenture PLC	3.5%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007754

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Trading Symbol

MSFAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$48	0.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.93%

^[47]

AssetsNet

$ 2,689,245,443

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,689,245,443
# of Portfolio Holdings	35
Portfolio Turnover Rate	14%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.7%
Communication Services	3.6%
Consumer Discretionary	6.6%
Health Care	11.6%
Industrials	12.5%
Consumer Staples	12.7%
Financials	24.6%
Information Technology	26.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.5%
SAP SE	7.9%
Visa, Inc.	6.4%
L'Oreal SA	4.7%
Aon PLC	4.2%
Coca-Cola Co.	3.7%
Booking Holdings, Inc.	3.6%
Alphabet, Inc.	3.6%
RELX PLC	3.5%
Accenture PLC	3.5%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113809

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Trading Symbol

MSFLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$88	1.71%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 88

Expense Ratio, Percent

1.71%

^[48]

AssetsNet

$ 2,689,245,443

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,689,245,443
# of Portfolio Holdings	35
Portfolio Turnover Rate	14%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.7%
Communication Services	3.6%
Consumer Discretionary	6.6%
Health Care	11.6%
Industrials	12.5%
Consumer Staples	12.7%
Financials	24.6%
Information Technology	26.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.5%
SAP SE	7.9%
Visa, Inc.	6.4%
L'Oreal SA	4.7%
Aon PLC	4.2%
Coca-Cola Co.	3.7%
Booking Holdings, Inc.	3.6%
Alphabet, Inc.	3.6%
RELX PLC	3.5%
Accenture PLC	3.5%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000156276

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio

Class Name

Trading Symbol

MGISX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Franchise Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$43	0.83%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 43

Expense Ratio, Percent

0.83%

^[49]

AssetsNet

$ 2,689,245,443

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

14.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,689,245,443
# of Portfolio Holdings	35
Portfolio Turnover Rate	14%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.7%
Communication Services	3.6%
Consumer Discretionary	6.6%
Health Care	11.6%
Industrials	12.5%
Consumer Staples	12.7%
Financials	24.6%
Information Technology	26.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Microsoft Corp.	9.5%
SAP SE	7.9%
Visa, Inc.	6.4%
L'Oreal SA	4.7%
Aon PLC	4.2%
Coca-Cola Co.	3.7%
Booking Holdings, Inc.	3.6%
Alphabet, Inc.	3.6%
RELX PLC	3.5%
Accenture PLC	3.5%
Total	50.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094893

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Trading Symbol

MIGPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$71	1.33%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.33%

^[50]

AssetsNet

$ 65,793,773

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

44.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$65,793,773
# of Portfolio Holdings	34
Portfolio Turnover Rate	44%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.5%
Real Estate	2.4%
Communication Services	4.1%
Industrials	5.9%
Health Care	7.8%
Financials	16.3%
Consumer Discretionary	21.3%
Information Technology	40.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	12.1%
MercadoLibre, Inc.	6.7%
Affirm Holdings, Inc.	6.6%
MicroStrategy, Inc.	6.0%
Tesla, Inc.	5.7%
Shopify, Inc.	5.5%
Adyen NV	4.9%
Royalty Pharma PLC	4.8%
IonQ, Inc.	3.7%
AppLovin Corp.	3.6%
Total	59.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155902

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Trading Symbol

MSPTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$113	2.11%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 113

Expense Ratio, Percent

2.11%

^[51]

AssetsNet

$ 65,793,773

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

44.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$65,793,773
# of Portfolio Holdings	34
Portfolio Turnover Rate	44%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.5%
Real Estate	2.4%
Communication Services	4.1%
Industrials	5.9%
Health Care	7.8%
Financials	16.3%
Consumer Discretionary	21.3%
Information Technology	40.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	12.1%
MercadoLibre, Inc.	6.7%
Affirm Holdings, Inc.	6.6%
MicroStrategy, Inc.	6.0%
Tesla, Inc.	5.7%
Shopify, Inc.	5.5%
Adyen NV	4.9%
Royalty Pharma PLC	4.8%
IonQ, Inc.	3.7%
AppLovin Corp.	3.6%
Total	59.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094891

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Trading Symbol

MIGIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$54	1.01%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.01%

^[52]

AssetsNet

$ 65,793,773

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

44.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$65,793,773
# of Portfolio Holdings	34
Portfolio Turnover Rate	44%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.5%
Real Estate	2.4%
Communication Services	4.1%
Industrials	5.9%
Health Care	7.8%
Financials	16.3%
Consumer Discretionary	21.3%
Information Technology	40.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	12.1%
MercadoLibre, Inc.	6.7%
Affirm Holdings, Inc.	6.6%
MicroStrategy, Inc.	6.0%
Tesla, Inc.	5.7%
Shopify, Inc.	5.5%
Adyen NV	4.9%
Royalty Pharma PLC	4.8%
IonQ, Inc.	3.7%
AppLovin Corp.	3.6%
Total	59.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094892

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Trading Symbol

MIGLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$100	1.86%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 100

Expense Ratio, Percent

1.86%

^[53]

AssetsNet

$ 65,793,773

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

44.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$65,793,773
# of Portfolio Holdings	34
Portfolio Turnover Rate	44%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.5%
Real Estate	2.4%
Communication Services	4.1%
Industrials	5.9%
Health Care	7.8%
Financials	16.3%
Consumer Discretionary	21.3%
Information Technology	40.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	12.1%
MercadoLibre, Inc.	6.7%
Affirm Holdings, Inc.	6.6%
MicroStrategy, Inc.	6.0%
Tesla, Inc.	5.7%
Shopify, Inc.	5.5%
Adyen NV	4.9%
Royalty Pharma PLC	4.8%
IonQ, Inc.	3.7%
AppLovin Corp.	3.6%
Total	59.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000228507

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio

Class Name

Trading Symbol

MGZZX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Insight Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$52	0.96%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 52

Expense Ratio, Percent

0.96%

^[54]

AssetsNet

$ 65,793,773

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

44.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$65,793,773
# of Portfolio Holdings	34
Portfolio Turnover Rate	44%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.5%
Real Estate	2.4%
Communication Services	4.1%
Industrials	5.9%
Health Care	7.8%
Financials	16.3%
Consumer Discretionary	21.3%
Information Technology	40.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	12.1%
MercadoLibre, Inc.	6.7%
Affirm Holdings, Inc.	6.6%
MicroStrategy, Inc.	6.0%
Tesla, Inc.	5.7%
Shopify, Inc.	5.5%
Adyen NV	4.9%
Royalty Pharma PLC	4.8%
IonQ, Inc.	3.7%
AppLovin Corp.	3.6%
Total	59.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085100

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Trading Symbol

MGGPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$65	1.21%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.21%

^[55]

AssetsNet

$ 3,523,517,337

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$3,523,517,337
# of Portfolio Holdings	36
Portfolio Turnover Rate	1%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	4.3%
Information Technology	13.8%
Industrials	15.7%
Financials	17.5%
Communication Services	18.1%
Consumer Discretionary	30.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Meta Platforms, Inc.	7.5%
Uber Technologies, Inc.	6.2%
Spotify Technology SA	6.0%
MercadoLibre, Inc.	6.0%
DoorDash, Inc.	5.7%
DSV AS	4.8%
ServiceNow, Inc.	4.5%
Schneider Electric SE	3.9%
Amazon.com, Inc.	3.9%
Coupang, Inc.	3.6%
Total	52.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155900

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Trading Symbol

MSOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$104	1.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 104

Expense Ratio, Percent

1.94%

^[56]

AssetsNet

$ 3,523,517,337

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$3,523,517,337
# of Portfolio Holdings	36
Portfolio Turnover Rate	1%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	4.3%
Information Technology	13.8%
Industrials	15.7%
Financials	17.5%
Communication Services	18.1%
Consumer Discretionary	30.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Meta Platforms, Inc.	7.5%
Uber Technologies, Inc.	6.2%
Spotify Technology SA	6.0%
MercadoLibre, Inc.	6.0%
DoorDash, Inc.	5.7%
DSV AS	4.8%
ServiceNow, Inc.	4.5%
Schneider Electric SE	3.9%
Amazon.com, Inc.	3.9%
Coupang, Inc.	3.6%
Total	52.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085098

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Trading Symbol

MGGIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$50	0.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

0.93%

^[57]

AssetsNet

$ 3,523,517,337

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$3,523,517,337
# of Portfolio Holdings	36
Portfolio Turnover Rate	1%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	4.3%
Information Technology	13.8%
Industrials	15.7%
Financials	17.5%
Communication Services	18.1%
Consumer Discretionary	30.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Meta Platforms, Inc.	7.5%
Uber Technologies, Inc.	6.2%
Spotify Technology SA	6.0%
MercadoLibre, Inc.	6.0%
DoorDash, Inc.	5.7%
DSV AS	4.8%
ServiceNow, Inc.	4.5%
Schneider Electric SE	3.9%
Amazon.com, Inc.	3.9%
Coupang, Inc.	3.6%
Total	52.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198822

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Trading Symbol

MGORX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$46	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.85%

^[58]

AssetsNet

$ 3,523,517,337

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$3,523,517,337
# of Portfolio Holdings	36
Portfolio Turnover Rate	1%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	4.3%
Information Technology	13.8%
Industrials	15.7%
Financials	17.5%
Communication Services	18.1%
Consumer Discretionary	30.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Meta Platforms, Inc.	7.5%
Uber Technologies, Inc.	6.2%
Spotify Technology SA	6.0%
MercadoLibre, Inc.	6.0%
DoorDash, Inc.	5.7%
DSV AS	4.8%
ServiceNow, Inc.	4.5%
Schneider Electric SE	3.9%
Amazon.com, Inc.	3.9%
Coupang, Inc.	3.6%
Total	52.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085099

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Trading Symbol

MGGLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$69	1.29%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 69

Expense Ratio, Percent

1.29%

^[59]

AssetsNet

$ 3,523,517,337

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$3,523,517,337
# of Portfolio Holdings	36
Portfolio Turnover Rate	1%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	4.3%
Information Technology	13.8%
Industrials	15.7%
Financials	17.5%
Communication Services	18.1%
Consumer Discretionary	30.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Meta Platforms, Inc.	7.5%
Uber Technologies, Inc.	6.2%
Spotify Technology SA	6.0%
MercadoLibre, Inc.	6.0%
DoorDash, Inc.	5.7%
DSV AS	4.8%
ServiceNow, Inc.	4.5%
Schneider Electric SE	3.9%
Amazon.com, Inc.	3.9%
Coupang, Inc.	3.6%
Total	52.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126921

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio

Class Name

Trading Symbol

MGTSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$46	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.85%

^[60]

AssetsNet

$ 3,523,517,337

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$3,523,517,337
# of Portfolio Holdings	36
Portfolio Turnover Rate	1%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	4.3%
Information Technology	13.8%
Industrials	15.7%
Financials	17.5%
Communication Services	18.1%
Consumer Discretionary	30.6%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Meta Platforms, Inc.	7.5%
Uber Technologies, Inc.	6.2%
Spotify Technology SA	6.0%
MercadoLibre, Inc.	6.0%
DoorDash, Inc.	5.7%
DSV AS	4.8%
ServiceNow, Inc.	4.5%
Schneider Electric SE	3.9%
Amazon.com, Inc.	3.9%
Coupang, Inc.	3.6%
Total	52.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211166

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Trading Symbol

MGKAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$76	1.35%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 76

Expense Ratio, Percent

1.35%

^[61]

AssetsNet

$ 4,227,944

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,227,944
# of Portfolio Holdings	50
Portfolio Turnover Rate	37%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	0.1%
Energy	1.8%
Short-Term Investments	2.4%
Consumer Staples	3.0%
Materials	6.2%
Real Estate	7.3%
Financials	9.1%
Consumer Discretionary	12.5%
Health Care	14.1%
Information Technology	18.7%
Industrials	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Babcock International Group PLC	6.7%
Royalty Pharma PLC	6.7%
QXO, Inc.	6.4%
Eurofins Scientific SE	5.1%
Core & Main, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.7%
Royal Gold, Inc.	4.6%
Canadian National Railway Co.	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211167

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Trading Symbol

MGKCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$118	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 118

Expense Ratio, Percent

2.10%

^[62]

AssetsNet

$ 4,227,944

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,227,944
# of Portfolio Holdings	50
Portfolio Turnover Rate	37%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	0.1%
Energy	1.8%
Short-Term Investments	2.4%
Consumer Staples	3.0%
Materials	6.2%
Real Estate	7.3%
Financials	9.1%
Consumer Discretionary	12.5%
Health Care	14.1%
Information Technology	18.7%
Industrials	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Babcock International Group PLC	6.7%
Royalty Pharma PLC	6.7%
QXO, Inc.	6.4%
Eurofins Scientific SE	5.1%
Core & Main, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.7%
Royal Gold, Inc.	4.6%
Canadian National Railway Co.	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211168

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Trading Symbol

MGKIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$56	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.00%

^[63]

AssetsNet

$ 4,227,944

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,227,944
# of Portfolio Holdings	50
Portfolio Turnover Rate	37%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	0.1%
Energy	1.8%
Short-Term Investments	2.4%
Consumer Staples	3.0%
Materials	6.2%
Real Estate	7.3%
Financials	9.1%
Consumer Discretionary	12.5%
Health Care	14.1%
Information Technology	18.7%
Industrials	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Babcock International Group PLC	6.7%
Royalty Pharma PLC	6.7%
QXO, Inc.	6.4%
Eurofins Scientific SE	5.1%
Core & Main, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.7%
Royal Gold, Inc.	4.6%
Canadian National Railway Co.	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000211165

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio

Class Name

Trading Symbol

MGKQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$53	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 53

Expense Ratio, Percent

0.95%

^[64]

AssetsNet

$ 4,227,944

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

37.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,227,944
# of Portfolio Holdings	50
Portfolio Turnover Rate	37%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	0.1%
Energy	1.8%
Short-Term Investments	2.4%
Consumer Staples	3.0%
Materials	6.2%
Real Estate	7.3%
Financials	9.1%
Consumer Discretionary	12.5%
Health Care	14.1%
Information Technology	18.7%
Industrials	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Babcock International Group PLC	6.7%
Royalty Pharma PLC	6.7%
QXO, Inc.	6.4%
Eurofins Scientific SE	5.1%
Core & Main, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.7%
Royal Gold, Inc.	4.6%
Canadian National Railway Co.	4.6%
Total	62.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129961

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Trading Symbol

MGQAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$60	1.15%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 60

Expense Ratio, Percent

1.15%

^[65]

AssetsNet

$ 49,781,352

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$49,781,352
# of Portfolio Holdings	40
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Consumer, Non-Cyclical	2.0%
Health Care	6.6%
Consumer, Cyclical	8.4%
Communication Services	9.0%
Industrials	18.4%
Financials	23.0%
Information Technology	31.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	7.8%
Visa, Inc.	4.4%
Microsoft Corp.	3.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.6%
Uber Technologies, Inc.	3.5%
Netflix, Inc.	3.5%
Mastercard, Inc.	3.5%
Alphabet, Inc.	3.4%
Booking Holdings, Inc.	3.3%
Halma PLC	3.2%
Total	39.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155911

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Trading Symbol

MSGQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$99	1.90%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 99

Expense Ratio, Percent

1.90%

^[66]

AssetsNet

$ 49,781,352

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$49,781,352
# of Portfolio Holdings	40
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Consumer, Non-Cyclical	2.0%
Health Care	6.6%
Consumer, Cyclical	8.4%
Communication Services	9.0%
Industrials	18.4%
Financials	23.0%
Information Technology	31.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	7.8%
Visa, Inc.	4.4%
Microsoft Corp.	3.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.6%
Uber Technologies, Inc.	3.5%
Netflix, Inc.	3.5%
Mastercard, Inc.	3.5%
Alphabet, Inc.	3.4%
Booking Holdings, Inc.	3.3%
Halma PLC	3.2%
Total	39.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129960

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Trading Symbol

MGQIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$42	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 42

Expense Ratio, Percent

0.80%

^[67]

AssetsNet

$ 49,781,352

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$49,781,352
# of Portfolio Holdings	40
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Consumer, Non-Cyclical	2.0%
Health Care	6.6%
Consumer, Cyclical	8.4%
Communication Services	9.0%
Industrials	18.4%
Financials	23.0%
Information Technology	31.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	7.8%
Visa, Inc.	4.4%
Microsoft Corp.	3.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.6%
Uber Technologies, Inc.	3.5%
Netflix, Inc.	3.5%
Mastercard, Inc.	3.5%
Alphabet, Inc.	3.4%
Booking Holdings, Inc.	3.3%
Halma PLC	3.2%
Total	39.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129962

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Trading Symbol

MGQLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$86	1.65%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 86

Expense Ratio, Percent

1.65%

^[68]

AssetsNet

$ 49,781,352

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$49,781,352
# of Portfolio Holdings	40
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Consumer, Non-Cyclical	2.0%
Health Care	6.6%
Consumer, Cyclical	8.4%
Communication Services	9.0%
Industrials	18.4%
Financials	23.0%
Information Technology	31.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	7.8%
Visa, Inc.	4.4%
Microsoft Corp.	3.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.6%
Uber Technologies, Inc.	3.5%
Netflix, Inc.	3.5%
Mastercard, Inc.	3.5%
Alphabet, Inc.	3.4%
Booking Holdings, Inc.	3.3%
Halma PLC	3.2%
Total	39.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129963

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio

Class Name

Trading Symbol

MGQSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Global Stars Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$39	0.75%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 39

Expense Ratio, Percent

0.75%

^[69]

AssetsNet

$ 49,781,352

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

20.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$49,781,352
# of Portfolio Holdings	40
Portfolio Turnover Rate	20%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Consumer, Non-Cyclical	2.0%
Health Care	6.6%
Consumer, Cyclical	8.4%
Communication Services	9.0%
Industrials	18.4%
Financials	23.0%
Information Technology	31.2%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	7.8%
Visa, Inc.	4.4%
Microsoft Corp.	3.6%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.6%
Uber Technologies, Inc.	3.5%
Netflix, Inc.	3.5%
Mastercard, Inc.	3.5%
Alphabet, Inc.	3.4%
Booking Holdings, Inc.	3.3%
Halma PLC	3.2%
Total	39.8%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007751

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Trading Symbol

MSEGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$48	0.88%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.88%

^[70]

AssetsNet

$ 4,498,207,272

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,498,207,272
# of Portfolio Holdings	26
Portfolio Turnover Rate	39%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Industrials	4.9%
Health Care	5.7%
Communication Services	5.9%
Financials	12.4%
Consumer Discretionary	17.3%
Information Technology	52.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.4%
Tesla, Inc.	6.5%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.3%
ROBLOX Corp.	5.9%
AppLovin Corp.	5.2%
DoorDash, Inc.	5.0%
Crowdstrike Holdings, Inc.	4.9%
MercadoLibre, Inc.	4.9%
Snowflake, Inc.	4.8%
Total	64.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155892

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Trading Symbol

MSGUX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$88	1.63%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 88

Expense Ratio, Percent

1.63%

^[71]

AssetsNet

$ 4,498,207,272

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,498,207,272
# of Portfolio Holdings	26
Portfolio Turnover Rate	39%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Industrials	4.9%
Health Care	5.7%
Communication Services	5.9%
Financials	12.4%
Consumer Discretionary	17.3%
Information Technology	52.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.4%
Tesla, Inc.	6.5%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.3%
ROBLOX Corp.	5.9%
AppLovin Corp.	5.2%
DoorDash, Inc.	5.0%
Crowdstrike Holdings, Inc.	4.9%
MercadoLibre, Inc.	4.9%
Snowflake, Inc.	4.8%
Total	64.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007750

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Trading Symbol

MSEQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$34	0.63%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 34

Expense Ratio, Percent

0.63%

^[72]

AssetsNet

$ 4,498,207,272

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,498,207,272
# of Portfolio Holdings	26
Portfolio Turnover Rate	39%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Industrials	4.9%
Health Care	5.7%
Communication Services	5.9%
Financials	12.4%
Consumer Discretionary	17.3%
Information Technology	52.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.4%
Tesla, Inc.	6.5%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.3%
ROBLOX Corp.	5.9%
AppLovin Corp.	5.2%
DoorDash, Inc.	5.0%
Crowdstrike Holdings, Inc.	4.9%
MercadoLibre, Inc.	4.9%
Snowflake, Inc.	4.8%
Total	64.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198816

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Trading Symbol

MGHRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$29	0.53%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 29

Expense Ratio, Percent

0.53%

^[73]

AssetsNet

$ 4,498,207,272

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,498,207,272
# of Portfolio Holdings	26
Portfolio Turnover Rate	39%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Industrials	4.9%
Health Care	5.7%
Communication Services	5.9%
Financials	12.4%
Consumer Discretionary	17.3%
Information Technology	52.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.4%
Tesla, Inc.	6.5%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.3%
ROBLOX Corp.	5.9%
AppLovin Corp.	5.2%
DoorDash, Inc.	5.0%
Crowdstrike Holdings, Inc.	4.9%
MercadoLibre, Inc.	4.9%
Snowflake, Inc.	4.8%
Total	64.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113805

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Trading Symbol

MSHLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$75	1.38%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 75

Expense Ratio, Percent

1.38%

^[74]

AssetsNet

$ 4,498,207,272

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,498,207,272
# of Portfolio Holdings	26
Portfolio Turnover Rate	39%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Industrials	4.9%
Health Care	5.7%
Communication Services	5.9%
Financials	12.4%
Consumer Discretionary	17.3%
Information Technology	52.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.4%
Tesla, Inc.	6.5%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.3%
ROBLOX Corp.	5.9%
AppLovin Corp.	5.2%
DoorDash, Inc.	5.0%
Crowdstrike Holdings, Inc.	4.9%
MercadoLibre, Inc.	4.9%
Snowflake, Inc.	4.8%
Total	64.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126914

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Growth Portfolio

Class Name

Trading Symbol

MGRPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Growth Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$29	0.53%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 29

Expense Ratio, Percent

0.53%

^[75]

AssetsNet

$ 4,498,207,272

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

39.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$4,498,207,272
# of Portfolio Holdings	26
Portfolio Turnover Rate	39%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	1.4%
Industrials	4.9%
Health Care	5.7%
Communication Services	5.9%
Financials	12.4%
Consumer Discretionary	17.3%
Information Technology	52.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.4%
Tesla, Inc.	6.5%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.3%
ROBLOX Corp.	5.9%
AppLovin Corp.	5.2%
DoorDash, Inc.	5.0%
Crowdstrike Holdings, Inc.	4.9%
MercadoLibre, Inc.	4.9%
Snowflake, Inc.	4.8%
Total	64.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007745

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Trading Symbol

MSSMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$67	1.32%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 67

Expense Ratio, Percent

1.32%

^[76]

AssetsNet

$ 339,967,657

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$339,967,657
# of Portfolio Holdings	56
Portfolio Turnover Rate	38%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Energy	0.5%
Communication Services	2.0%
Materials	2.3%
Short-Term Investments	2.7%
Industrials	4.5%
Real Estate	5.2%
Financials	6.1%
Consumer Staples	9.4%
Health Care	17.9%
Consumer Discretionary	18.7%
Information Technology	30.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Oddity Tech Ltd.	6.6%
IonQ, Inc.	5.9%
Global-e Online Ltd.	5.3%
Landbridge Co. LLC	5.1%
MicroStrategy, Inc.	5.0%
Roivant Sciences Ltd.	4.8%
Aurora Innovation, Inc.	3.9%
Peloton Interactive, Inc.	3.8%
iShares Bitcoin Trust ETF	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155889

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Trading Symbol

MSCOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$106	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 106

Expense Ratio, Percent

2.10%

^[77]

AssetsNet

$ 339,967,657

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$339,967,657
# of Portfolio Holdings	56
Portfolio Turnover Rate	38%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Energy	0.5%
Communication Services	2.0%
Materials	2.3%
Short-Term Investments	2.7%
Industrials	4.5%
Real Estate	5.2%
Financials	6.1%
Consumer Staples	9.4%
Health Care	17.9%
Consumer Discretionary	18.7%
Information Technology	30.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Oddity Tech Ltd.	6.6%
IonQ, Inc.	5.9%
Global-e Online Ltd.	5.3%
Landbridge Co. LLC	5.1%
MicroStrategy, Inc.	5.0%
Roivant Sciences Ltd.	4.8%
Aurora Innovation, Inc.	3.9%
Peloton Interactive, Inc.	3.8%
iShares Bitcoin Trust ETF	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007744

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Trading Symbol

MSSGX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$50	0.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 50

Expense Ratio, Percent

0.99%

^[78]

AssetsNet

$ 339,967,657

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$339,967,657
# of Portfolio Holdings	56
Portfolio Turnover Rate	38%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Energy	0.5%
Communication Services	2.0%
Materials	2.3%
Short-Term Investments	2.7%
Industrials	4.5%
Real Estate	5.2%
Financials	6.1%
Consumer Staples	9.4%
Health Care	17.9%
Consumer Discretionary	18.7%
Information Technology	30.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Oddity Tech Ltd.	6.6%
IonQ, Inc.	5.9%
Global-e Online Ltd.	5.3%
Landbridge Co. LLC	5.1%
MicroStrategy, Inc.	5.0%
Roivant Sciences Ltd.	4.8%
Aurora Innovation, Inc.	3.9%
Peloton Interactive, Inc.	3.8%
iShares Bitcoin Trust ETF	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000104303

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Trading Symbol

MSSLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$93	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 93

Expense Ratio, Percent

1.85%

^[79]

AssetsNet

$ 339,967,657

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$339,967,657
# of Portfolio Holdings	56
Portfolio Turnover Rate	38%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Energy	0.5%
Communication Services	2.0%
Materials	2.3%
Short-Term Investments	2.7%
Industrials	4.5%
Real Estate	5.2%
Financials	6.1%
Consumer Staples	9.4%
Health Care	17.9%
Consumer Discretionary	18.7%
Information Technology	30.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Oddity Tech Ltd.	6.6%
IonQ, Inc.	5.9%
Global-e Online Ltd.	5.3%
Landbridge Co. LLC	5.1%
MicroStrategy, Inc.	5.0%
Roivant Sciences Ltd.	4.8%
Aurora Innovation, Inc.	3.9%
Peloton Interactive, Inc.	3.8%
iShares Bitcoin Trust ETF	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000129402

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Inception Portfolio

Class Name

Trading Symbol

MFLLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Inception Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$47	0.93%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.93%

^[80]

AssetsNet

$ 339,967,657

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

38.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$339,967,657
# of Portfolio Holdings	56
Portfolio Turnover Rate	38%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Energy	0.5%
Communication Services	2.0%
Materials	2.3%
Short-Term Investments	2.7%
Industrials	4.5%
Real Estate	5.2%
Financials	6.1%
Consumer Staples	9.4%
Health Care	17.9%
Consumer Discretionary	18.7%
Information Technology	30.7%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	13.8%
Oddity Tech Ltd.	6.6%
IonQ, Inc.	5.9%
Global-e Online Ltd.	5.3%
Landbridge Co. LLC	5.1%
MicroStrategy, Inc.	5.0%
Roivant Sciences Ltd.	4.8%
Aurora Innovation, Inc.	3.9%
Peloton Interactive, Inc.	3.8%
iShares Bitcoin Trust ETF	3.7%
Total	57.9%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094900

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Trading Symbol

MFAPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$69	1.28%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 69

Expense Ratio, Percent

1.28%

^[81]

AssetsNet

$ 2,866,106,316

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,866,106,316
# of Portfolio Holdings	34
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.7%
Italy	5.1%
Taiwan	5.4%
Netherlands	5.5%
Switzerland	5.9%
India	8.0%
Denmark	8.1%
Canada	8.5%
Sweden	9.0%
United States	9.0%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Spotify Technology SA	9.0%
Hermes International SCA	8.6%
DSV AS	8.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.4%
Moncler SpA	5.1%
Schneider Electric SE	4.9%
MercadoLibre, Inc.	4.8%
L'Oreal SA	4.0%
ASML Holding NV	3.8%
Keyence Corp.	3.5%
Total	57.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155904

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Trading Symbol

MSIAX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$109	2.03%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 109

Expense Ratio, Percent

2.03%

^[82]

AssetsNet

$ 2,866,106,316

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,866,106,316
# of Portfolio Holdings	34
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.7%
Italy	5.1%
Taiwan	5.4%
Netherlands	5.5%
Switzerland	5.9%
India	8.0%
Denmark	8.1%
Canada	8.5%
Sweden	9.0%
United States	9.0%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Spotify Technology SA	9.0%
Hermes International SCA	8.6%
DSV AS	8.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.4%
Moncler SpA	5.1%
Schneider Electric SE	4.9%
MercadoLibre, Inc.	4.8%
L'Oreal SA	4.0%
ASML Holding NV	3.8%
Keyence Corp.	3.5%
Total	57.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094898

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Trading Symbol

MFAIX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$54	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.00%

^[83]

AssetsNet

$ 2,866,106,316

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,866,106,316
# of Portfolio Holdings	34
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.7%
Italy	5.1%
Taiwan	5.4%
Netherlands	5.5%
Switzerland	5.9%
India	8.0%
Denmark	8.1%
Canada	8.5%
Sweden	9.0%
United States	9.0%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Spotify Technology SA	9.0%
Hermes International SCA	8.6%
DSV AS	8.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.4%
Moncler SpA	5.1%
Schneider Electric SE	4.9%
MercadoLibre, Inc.	4.8%
L'Oreal SA	4.0%
ASML Holding NV	3.8%
Keyence Corp.	3.5%
Total	57.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000094899

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Trading Symbol

MSALX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$99	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 99

Expense Ratio, Percent

1.85%

^[84]

AssetsNet

$ 2,866,106,316

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,866,106,316
# of Portfolio Holdings	34
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.7%
Italy	5.1%
Taiwan	5.4%
Netherlands	5.5%
Switzerland	5.9%
India	8.0%
Denmark	8.1%
Canada	8.5%
Sweden	9.0%
United States	9.0%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Spotify Technology SA	9.0%
Hermes International SCA	8.6%
DSV AS	8.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.4%
Moncler SpA	5.1%
Schneider Electric SE	4.9%
MercadoLibre, Inc.	4.8%
L'Oreal SA	4.0%
ASML Holding NV	3.8%
Keyence Corp.	3.5%
Total	57.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198826

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Advantage Portfolio

Class Name

Trading Symbol

IDVSX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$48	0.90%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.90%

^[85]

AssetsNet

$ 2,866,106,316

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

0.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,866,106,316
# of Portfolio Holdings	34
Portfolio Turnover Rate	0%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.7%
Italy	5.1%
Taiwan	5.4%
Netherlands	5.5%
Switzerland	5.9%
India	8.0%
Denmark	8.1%
Canada	8.5%
Sweden	9.0%
United States	9.0%
France	20.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Spotify Technology SA	9.0%
Hermes International SCA	8.6%
DSV AS	8.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	5.4%
Moncler SpA	5.1%
Schneider Electric SE	4.9%
MercadoLibre, Inc.	4.8%
L'Oreal SA	4.0%
ASML Holding NV	3.8%
Keyence Corp.	3.5%
Total	57.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007759

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Trading Symbol

MIQBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$70	1.30%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 70

Expense Ratio, Percent

1.30%

^[86]

AssetsNet

$ 474,947,003

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$474,947,003
# of Portfolio Holdings	58
Portfolio Turnover Rate	23%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.2%
Taiwan	2.7%
Sweden	3.3%
Denmark	4.2%
Canada	4.2%
Finland	4.3%
Netherlands	6.2%
Japan	7.7%
Germany	10.4%
France	16.8%
United Kingdom	26.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	4.1%
L'Oreal SA	3.5%
Safran SA	3.0%
Haleon PLC	2.9%
Halma PLC	2.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	2.7%
Keyence Corp.	2.7%
Amadeus IT Group SA	2.6%
Capgemini SE	2.5%
ASML Holding NV	2.5%
Total	29.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155894

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Trading Symbol

MSECX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$111	2.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 111

Expense Ratio, Percent

2.05%

^[87]

AssetsNet

$ 474,947,003

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$474,947,003
# of Portfolio Holdings	58
Portfolio Turnover Rate	23%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.2%
Taiwan	2.7%
Sweden	3.3%
Denmark	4.2%
Canada	4.2%
Finland	4.3%
Netherlands	6.2%
Japan	7.7%
Germany	10.4%
France	16.8%
United Kingdom	26.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	4.1%
L'Oreal SA	3.5%
Safran SA	3.0%
Haleon PLC	2.9%
Halma PLC	2.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	2.7%
Keyence Corp.	2.7%
Amadeus IT Group SA	2.6%
Capgemini SE	2.5%
ASML Holding NV	2.5%
Total	29.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007758

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Trading Symbol

MSIQX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$51	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.95%

^[88]

AssetsNet

$ 474,947,003

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$474,947,003
# of Portfolio Holdings	58
Portfolio Turnover Rate	23%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.2%
Taiwan	2.7%
Sweden	3.3%
Denmark	4.2%
Canada	4.2%
Finland	4.3%
Netherlands	6.2%
Japan	7.7%
Germany	10.4%
France	16.8%
United Kingdom	26.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	4.1%
L'Oreal SA	3.5%
Safran SA	3.0%
Haleon PLC	2.9%
Halma PLC	2.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	2.7%
Keyence Corp.	2.7%
Amadeus IT Group SA	2.6%
Capgemini SE	2.5%
ASML Holding NV	2.5%
Total	29.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113811

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Trading Symbol

MSQLX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$97	1.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 97

Expense Ratio, Percent

1.80%

^[89]

AssetsNet

$ 474,947,003

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$474,947,003
# of Portfolio Holdings	58
Portfolio Turnover Rate	23%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.2%
Taiwan	2.7%
Sweden	3.3%
Denmark	4.2%
Canada	4.2%
Finland	4.3%
Netherlands	6.2%
Japan	7.7%
Germany	10.4%
France	16.8%
United Kingdom	26.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	4.1%
L'Oreal SA	3.5%
Safran SA	3.0%
Haleon PLC	2.9%
Halma PLC	2.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	2.7%
Keyence Corp.	2.7%
Amadeus IT Group SA	2.6%
Capgemini SE	2.5%
ASML Holding NV	2.5%
Total	29.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126915

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio

Class Name

Trading Symbol

MIQPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Equity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$49	0.91%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.91%

^[90]

AssetsNet

$ 474,947,003

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

23.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$474,947,003
# of Portfolio Holdings	58
Portfolio Turnover Rate	23%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	14.2%
Taiwan	2.7%
Sweden	3.3%
Denmark	4.2%
Canada	4.2%
Finland	4.3%
Netherlands	6.2%
Japan	7.7%
Germany	10.4%
France	16.8%
United Kingdom	26.0%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	4.1%
L'Oreal SA	3.5%
Safran SA	3.0%
Haleon PLC	2.9%
Halma PLC	2.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	2.7%
Keyence Corp.	2.7%
Amadeus IT Group SA	2.6%
Capgemini SE	2.5%
ASML Holding NV	2.5%
Total	29.3%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085089

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Trading Symbol

MIOPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$71	1.33%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 71

Expense Ratio, Percent

1.33%

^[91]

AssetsNet

$ 819,704,151

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$819,704,151
# of Portfolio Holdings	35
Portfolio Turnover Rate	2%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	17.0%
Netherlands	4.2%
Japan	6.0%
Brazil	6.1%
Denmark	6.2%
Sweden	7.0%
Korea, Republic of	8.1%
China	10.1%
United States	10.9%
France	11.6%
India	12.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	7.3%
Spotify Technology SA	7.0%
DSV AS	6.2%
Coupang, Inc.	4.9%
Schneider Electric SE	4.5%
Sanrio Co. Ltd.	4.2%
Hermes International SCA	4.2%
NU Holdings Ltd.	4.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
ICICI Bank Ltd.	3.8%
Total	50.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155897

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Trading Symbol

MSOCX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$112	2.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 112

Expense Ratio, Percent

2.09%

^[92]

AssetsNet

$ 819,704,151

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$819,704,151
# of Portfolio Holdings	35
Portfolio Turnover Rate	2%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	17.0%
Netherlands	4.2%
Japan	6.0%
Brazil	6.1%
Denmark	6.2%
Sweden	7.0%
Korea, Republic of	8.1%
China	10.1%
United States	10.9%
France	11.6%
India	12.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	7.3%
Spotify Technology SA	7.0%
DSV AS	6.2%
Coupang, Inc.	4.9%
Schneider Electric SE	4.5%
Sanrio Co. Ltd.	4.2%
Hermes International SCA	4.2%
NU Holdings Ltd.	4.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
ICICI Bank Ltd.	3.8%
Total	50.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085087

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Trading Symbol

MIOIX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$54	1.00%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 54

Expense Ratio, Percent

1.00%

^[93]

AssetsNet

$ 819,704,151

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$819,704,151
# of Portfolio Holdings	35
Portfolio Turnover Rate	2%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	17.0%
Netherlands	4.2%
Japan	6.0%
Brazil	6.1%
Denmark	6.2%
Sweden	7.0%
Korea, Republic of	8.1%
China	10.1%
United States	10.9%
France	11.6%
India	12.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	7.3%
Spotify Technology SA	7.0%
DSV AS	6.2%
Coupang, Inc.	4.9%
Schneider Electric SE	4.5%
Sanrio Co. Ltd.	4.2%
Hermes International SCA	4.2%
NU Holdings Ltd.	4.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
ICICI Bank Ltd.	3.8%
Total	50.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000198820

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Trading Symbol

MRNPX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$51	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.94%

^[94]

AssetsNet

$ 819,704,151

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$819,704,151
# of Portfolio Holdings	35
Portfolio Turnover Rate	2%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	17.0%
Netherlands	4.2%
Japan	6.0%
Brazil	6.1%
Denmark	6.2%
Sweden	7.0%
Korea, Republic of	8.1%
China	10.1%
United States	10.9%
France	11.6%
India	12.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	7.3%
Spotify Technology SA	7.0%
DSV AS	6.2%
Coupang, Inc.	4.9%
Schneider Electric SE	4.5%
Sanrio Co. Ltd.	4.2%
Hermes International SCA	4.2%
NU Holdings Ltd.	4.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
ICICI Bank Ltd.	3.8%
Total	50.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000085088

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Trading Symbol

MIOLX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$99	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 99

Expense Ratio, Percent

1.85%

^[95]

AssetsNet

$ 819,704,151

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$819,704,151
# of Portfolio Holdings	35
Portfolio Turnover Rate	2%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	17.0%
Netherlands	4.2%
Japan	6.0%
Brazil	6.1%
Denmark	6.2%
Sweden	7.0%
Korea, Republic of	8.1%
China	10.1%
United States	10.9%
France	11.6%
India	12.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	7.3%
Spotify Technology SA	7.0%
DSV AS	6.2%
Coupang, Inc.	4.9%
Schneider Electric SE	4.5%
Sanrio Co. Ltd.	4.2%
Hermes International SCA	4.2%
NU Holdings Ltd.	4.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
ICICI Bank Ltd.	3.8%
Total	50.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126918

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - International Opportunity Portfolio

Class Name

Trading Symbol

MNOPX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$51	0.94%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 51

Expense Ratio, Percent

0.94%

^[96]

AssetsNet

$ 819,704,151

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

2.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$819,704,151
# of Portfolio Holdings	35
Portfolio Turnover Rate	2%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	17.0%
Netherlands	4.2%
Japan	6.0%
Brazil	6.1%
Denmark	6.2%
Sweden	7.0%
Korea, Republic of	8.1%
China	10.1%
United States	10.9%
France	11.6%
India	12.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

MercadoLibre, Inc.	7.3%
Spotify Technology SA	7.0%
DSV AS	6.2%
Coupang, Inc.	4.9%
Schneider Electric SE	4.5%
Sanrio Co. Ltd.	4.2%
Hermes International SCA	4.2%
NU Holdings Ltd.	4.1%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
ICICI Bank Ltd.	3.8%
Total	50.1%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236930

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Trading Symbol

MSDFX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$64	1.20%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 64

Expense Ratio, Percent

1.20%

^[97]

AssetsNet

$ 2,173,885

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,173,885
# of Portfolio Holdings	40
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	10.1%
Finland	3.1%
Spain	3.3%
Taiwan	3.7%
Japan	3.8%
Sweden	5.1%
Netherlands	5.9%
United States	9.7%
Germany	12.7%
France	17.8%
United Kingdom	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	6.3%
L'Oreal SA	4.3%
Safran SA	3.9%
Haleon PLC	3.9%
Keyence Corp.	3.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.7%
Halma PLC	3.7%
ASML Holding NV	3.4%
Amadeus IT Group SA	3.3%
Legrand SA	3.3%
Total	39.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236928

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Trading Symbol

MSDEX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$104	1.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 104

Expense Ratio, Percent

1.95%

^[98]

AssetsNet

$ 2,173,885

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,173,885
# of Portfolio Holdings	40
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	10.1%
Finland	3.1%
Spain	3.3%
Taiwan	3.7%
Japan	3.8%
Sweden	5.1%
Netherlands	5.9%
United States	9.7%
Germany	12.7%
France	17.8%
United Kingdom	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	6.3%
L'Oreal SA	4.3%
Safran SA	3.9%
Haleon PLC	3.9%
Keyence Corp.	3.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.7%
Halma PLC	3.7%
ASML Holding NV	3.4%
Amadeus IT Group SA	3.3%
Legrand SA	3.3%
Total	39.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236927

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Trading Symbol

MSDKX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$45	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.85%

^[99]

AssetsNet

$ 2,173,885

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,173,885
# of Portfolio Holdings	40
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	10.1%
Finland	3.1%
Spain	3.3%
Taiwan	3.7%
Japan	3.8%
Sweden	5.1%
Netherlands	5.9%
United States	9.7%
Germany	12.7%
France	17.8%
United Kingdom	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	6.3%
L'Oreal SA	4.3%
Safran SA	3.9%
Haleon PLC	3.9%
Keyence Corp.	3.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.7%
Halma PLC	3.7%
ASML Holding NV	3.4%
Amadeus IT Group SA	3.3%
Legrand SA	3.3%
Total	39.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000236929

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc - International Resilience Portfolio

Class Name

Trading Symbol

MSCZX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$43	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 43

Expense Ratio, Percent

0.80%

^[100]

AssetsNet

$ 2,173,885

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$2,173,885
# of Portfolio Holdings	40
Portfolio Turnover Rate	28%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	10.1%
Finland	3.1%
Spain	3.3%
Taiwan	3.7%
Japan	3.8%
Sweden	5.1%
Netherlands	5.9%
United States	9.7%
Germany	12.7%
France	17.8%
United Kingdom	24.8%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

SAP SE	6.3%
L'Oreal SA	4.3%
Safran SA	3.9%
Haleon PLC	3.9%
Keyence Corp.	3.8%
Taiwan Semiconductor Manufacturing Co. Ltd.	3.7%
Halma PLC	3.7%
ASML Holding NV	3.4%
Amadeus IT Group SA	3.3%
Legrand SA	3.3%
Total	39.6%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000200800

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Multi-Asset Real Return Portfolio

Class Name

Trading Symbol

MRJAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Multi-Asset Real Return Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$58	1.11%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 58

Expense Ratio, Percent

1.11%

^[101]

AssetsNet

$ 8,628,367

Holdings Count | Holding

218

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$8,628,367
# of Portfolio Holdings	218
Portfolio Turnover Rate	75%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	0.8%
China	0.2%
South Africa	0.3%
Germany	0.3%
Switzerland	0.6%
Japan	0.6%
France	0.8%
Australia	1.3%
United Kingdom	1.6%
Canada	3.9%
United States	89.6%

Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Value	Value
Short-Term Investments	17.5%
Common Stocks	18.6%
U.S. Treasury Securities	63.9%

Material Fund Change [Text Block]

Updated Prospectus Web Address

C000200801

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Multi-Asset Real Return Portfolio

Class Name

Trading Symbol

MRJCX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$97	1.86%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 97

Expense Ratio, Percent

1.86%

^[102]

AssetsNet

$ 8,628,367

Holdings Count | Holding

218

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$8,628,367
# of Portfolio Holdings	218
Portfolio Turnover Rate	75%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	0.8%
China	0.2%
South Africa	0.3%
Germany	0.3%
Switzerland	0.6%
Japan	0.6%
France	0.8%
Australia	1.3%
United Kingdom	1.6%
Canada	3.9%
United States	89.6%

Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Value	Value
Short-Term Investments	17.5%
Common Stocks	18.6%
U.S. Treasury Securities	63.9%

Material Fund Change [Text Block]

Updated Prospectus Web Address

C000200799

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Multi-Asset Real Return Portfolio

Class Name

Trading Symbol

MRJIX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$40	0.76%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 40

Expense Ratio, Percent

0.76%

^[103]

AssetsNet

$ 8,628,367

Holdings Count | Holding

218

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$8,628,367
# of Portfolio Holdings	218
Portfolio Turnover Rate	75%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	0.8%
China	0.2%
South Africa	0.3%
Germany	0.3%
Switzerland	0.6%
Japan	0.6%
France	0.8%
Australia	1.3%
United Kingdom	1.6%
Canada	3.9%
United States	89.6%

Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Value	Value
Short-Term Investments	17.5%
Common Stocks	18.6%
U.S. Treasury Securities	63.9%

Material Fund Change [Text Block]

Updated Prospectus Web Address

C000200802

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Multi-Asset Real Return Portfolio

Class Name

Trading Symbol

MRJSX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$37	0.71%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 37

Expense Ratio, Percent

0.71%

^[104]

AssetsNet

$ 8,628,367

Holdings Count | Holding

218

InvestmentCompanyPortfolioTurnover

75.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$8,628,367
# of Portfolio Holdings	218
Portfolio Turnover Rate	75%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	0.8%
China	0.2%
South Africa	0.3%
Germany	0.3%
Switzerland	0.6%
Japan	0.6%
France	0.8%
Australia	1.3%
United Kingdom	1.6%
Canada	3.9%
United States	89.6%

Credit Quality Explanation [Text Block]

Asset Allocation (% of total investments)

Value	Value
Short-Term Investments	17.5%
Common Stocks	18.6%
U.S. Treasury Securities	63.9%

Material Fund Change [Text Block]

Updated Prospectus Web Address

C000115786

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Next Gen Emerging Markets Portfolio

Class Name

Trading Symbol

MFMPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Next Gen Emerging Markets Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$81	1.60%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 81

Expense Ratio, Percent

1.60%

^[105]

AssetsNet

$ 20,771,045

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$20,771,045
# of Portfolio Holdings	38
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	12.6%
Peru	3.6%
Slovenia	4.2%
Bangladesh	4.9%
Egypt	6.1%
Pakistan	6.4%
Philippines	9.2%
Kazakhstan	9.3%
Indonesia	11.1%
United States	12.2%
Vietnam	20.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

FPT Corp.	6.5%
MercadoLibre, Inc.	6.2%
NAC Kazatomprom JSC	4.3%
Nova Ljubljanska Banka DD	4.2%
Century Pacific Food, Inc.	4.2%
Medikaloka Hermina Tbk. PT	3.7%
Systems Ltd.	3.5%
Commercial International Bank - Egypt (CIB)	3.5%
Phu Nhuan Jewelry JSC	3.3%
Mobile World Investment Corp.	3.1%
Total	42.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155910

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Next Gen Emerging Markets Portfolio

Class Name

Trading Symbol

MSFEX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$119	2.35%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 119

Expense Ratio, Percent

2.35%

^[106]

AssetsNet

$ 20,771,045

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$20,771,045
# of Portfolio Holdings	38
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	12.6%
Peru	3.6%
Slovenia	4.2%
Bangladesh	4.9%
Egypt	6.1%
Pakistan	6.4%
Philippines	9.2%
Kazakhstan	9.3%
Indonesia	11.1%
United States	12.2%
Vietnam	20.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

FPT Corp.	6.5%
MercadoLibre, Inc.	6.2%
NAC Kazatomprom JSC	4.3%
Nova Ljubljanska Banka DD	4.2%
Century Pacific Food, Inc.	4.2%
Medikaloka Hermina Tbk. PT	3.7%
Systems Ltd.	3.5%
Commercial International Bank - Egypt (CIB)	3.5%
Phu Nhuan Jewelry JSC	3.3%
Mobile World Investment Corp.	3.1%
Total	42.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000115785

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Next Gen Emerging Markets Portfolio

Class Name

Trading Symbol

MFMIX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$63	1.25%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 63

Expense Ratio, Percent

1.25%

^[107]

AssetsNet

$ 20,771,045

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$20,771,045
# of Portfolio Holdings	38
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	12.6%
Peru	3.6%
Slovenia	4.2%
Bangladesh	4.9%
Egypt	6.1%
Pakistan	6.4%
Philippines	9.2%
Kazakhstan	9.3%
Indonesia	11.1%
United States	12.2%
Vietnam	20.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

FPT Corp.	6.5%
MercadoLibre, Inc.	6.2%
NAC Kazatomprom JSC	4.3%
Nova Ljubljanska Banka DD	4.2%
Century Pacific Food, Inc.	4.2%
Medikaloka Hermina Tbk. PT	3.7%
Systems Ltd.	3.5%
Commercial International Bank - Egypt (CIB)	3.5%
Phu Nhuan Jewelry JSC	3.3%
Mobile World Investment Corp.	3.1%
Total	42.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000115788

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Next Gen Emerging Markets Portfolio

Class Name

Trading Symbol

MFMLX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$106	2.10%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 106

Expense Ratio, Percent

2.10%

^[108]

AssetsNet

$ 20,771,045

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$20,771,045
# of Portfolio Holdings	38
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	12.6%
Peru	3.6%
Slovenia	4.2%
Bangladesh	4.9%
Egypt	6.1%
Pakistan	6.4%
Philippines	9.2%
Kazakhstan	9.3%
Indonesia	11.1%
United States	12.2%
Vietnam	20.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

FPT Corp.	6.5%
MercadoLibre, Inc.	6.2%
NAC Kazatomprom JSC	4.3%
Nova Ljubljanska Banka DD	4.2%
Century Pacific Food, Inc.	4.2%
Medikaloka Hermina Tbk. PT	3.7%
Systems Ltd.	3.5%
Commercial International Bank - Egypt (CIB)	3.5%
Phu Nhuan Jewelry JSC	3.3%
Mobile World Investment Corp.	3.1%
Total	42.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000152578

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Next Gen Emerging Markets Portfolio

Class Name

Trading Symbol

MSRFX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$61	1.20%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 61

Expense Ratio, Percent

1.20%

^[109]

AssetsNet

$ 20,771,045

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

1.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$20,771,045
# of Portfolio Holdings	38
Portfolio Turnover Rate	1%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	12.6%
Peru	3.6%
Slovenia	4.2%
Bangladesh	4.9%
Egypt	6.1%
Pakistan	6.4%
Philippines	9.2%
Kazakhstan	9.3%
Indonesia	11.1%
United States	12.2%
Vietnam	20.4%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

FPT Corp.	6.5%
MercadoLibre, Inc.	6.2%
NAC Kazatomprom JSC	4.3%
Nova Ljubljanska Banka DD	4.2%
Century Pacific Food, Inc.	4.2%
Medikaloka Hermina Tbk. PT	3.7%
Systems Ltd.	3.5%
Commercial International Bank - Egypt (CIB)	3.5%
Phu Nhuan Jewelry JSC	3.3%
Mobile World Investment Corp.	3.1%
Total	42.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007737

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Trading Symbol

MSIBX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$67	1.21%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 67

Expense Ratio, Percent

1.21%

^[110]

AssetsNet

$ 161,702,937

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$161,702,937
# of Portfolio Holdings	73
Portfolio Turnover Rate	27%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	24.0%
Ireland	3.8%
Taiwan	4.5%
Korea, Republic of	5.8%
United Kingdom	6.7%
Canada	7.2%
France	8.6%
United States	8.7%
India	9.1%
Germany	9.7%
Japan	11.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
Samsung Electronics Co. Ltd.	3.1%
Hanwha Aerospace Co. Ltd.	2.7%
Rheinmetall AG	2.6%
MercadoLibre, Inc.	2.6%
HDFC Bank Ltd.	2.5%
Sony Group Corp.	2.4%
AIB Group PLC	2.4%
SAP SE	2.3%
CaixaBank SA	2.2%
Total	26.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155887

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Trading Symbol

MSAAX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$110	1.99%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 110

Expense Ratio, Percent

1.99%

^[111]

AssetsNet

$ 161,702,937

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$161,702,937
# of Portfolio Holdings	73
Portfolio Turnover Rate	27%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	24.0%
Ireland	3.8%
Taiwan	4.5%
Korea, Republic of	5.8%
United Kingdom	6.7%
Canada	7.2%
France	8.6%
United States	8.7%
India	9.1%
Germany	9.7%
Japan	11.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
Samsung Electronics Co. Ltd.	3.1%
Hanwha Aerospace Co. Ltd.	2.7%
Rheinmetall AG	2.6%
MercadoLibre, Inc.	2.6%
HDFC Bank Ltd.	2.5%
Sony Group Corp.	2.4%
AIB Group PLC	2.4%
SAP SE	2.3%
CaixaBank SA	2.2%
Total	26.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000007736

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Trading Symbol

MSACX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$49	0.89%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 49

Expense Ratio, Percent

0.89%

^[112]

AssetsNet

$ 161,702,937

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$161,702,937
# of Portfolio Holdings	73
Portfolio Turnover Rate	27%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	24.0%
Ireland	3.8%
Taiwan	4.5%
Korea, Republic of	5.8%
United Kingdom	6.7%
Canada	7.2%
France	8.6%
United States	8.7%
India	9.1%
Germany	9.7%
Japan	11.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
Samsung Electronics Co. Ltd.	3.1%
Hanwha Aerospace Co. Ltd.	2.7%
Rheinmetall AG	2.6%
MercadoLibre, Inc.	2.6%
HDFC Bank Ltd.	2.5%
Sony Group Corp.	2.4%
AIB Group PLC	2.4%
SAP SE	2.3%
CaixaBank SA	2.2%
Total	26.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000215549

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Trading Symbol

MAIHX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class IR	$47	0.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.84%

^[113]

AssetsNet

$ 161,702,937

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$161,702,937
# of Portfolio Holdings	73
Portfolio Turnover Rate	27%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	24.0%
Ireland	3.8%
Taiwan	4.5%
Korea, Republic of	5.8%
United Kingdom	6.7%
Canada	7.2%
France	8.6%
United States	8.7%
India	9.1%
Germany	9.7%
Japan	11.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
Samsung Electronics Co. Ltd.	3.1%
Hanwha Aerospace Co. Ltd.	2.7%
Rheinmetall AG	2.6%
MercadoLibre, Inc.	2.6%
HDFC Bank Ltd.	2.5%
Sony Group Corp.	2.4%
AIB Group PLC	2.4%
SAP SE	2.3%
CaixaBank SA	2.2%
Total	26.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000113799

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Trading Symbol

MSLLX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class L	$96	1.74%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 96

Expense Ratio, Percent

1.74%

^[114]

AssetsNet

$ 161,702,937

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$161,702,937
# of Portfolio Holdings	73
Portfolio Turnover Rate	27%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	24.0%
Ireland	3.8%
Taiwan	4.5%
Korea, Republic of	5.8%
United Kingdom	6.7%
Canada	7.2%
France	8.6%
United States	8.7%
India	9.1%
Germany	9.7%
Japan	11.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
Samsung Electronics Co. Ltd.	3.1%
Hanwha Aerospace Co. Ltd.	2.7%
Rheinmetall AG	2.6%
MercadoLibre, Inc.	2.6%
HDFC Bank Ltd.	2.5%
Sony Group Corp.	2.4%
AIB Group PLC	2.4%
SAP SE	2.3%
CaixaBank SA	2.2%
Total	26.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000215548

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Passport Overseas Equity Portfolio

Class Name

Trading Symbol

MAIJX

Annual or Semi-Annual Statement [Text Block]

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$47	0.84%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 47

Expense Ratio, Percent

0.84%

^[115]

AssetsNet

$ 161,702,937

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

27.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$161,702,937
# of Portfolio Holdings	73
Portfolio Turnover Rate	27%

Holdings [Text Block]

Country Allocation (% of total investments)

Value	Value
Other	24.0%
Ireland	3.8%
Taiwan	4.5%
Korea, Republic of	5.8%
United Kingdom	6.7%
Canada	7.2%
France	8.6%
United States	8.7%
India	9.1%
Germany	9.7%
Japan	11.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Taiwan Semiconductor Manufacturing Co. Ltd.	3.9%
Samsung Electronics Co. Ltd.	3.1%
Hanwha Aerospace Co. Ltd.	2.7%
Rheinmetall AG	2.6%
MercadoLibre, Inc.	2.6%
HDFC Bank Ltd.	2.5%
Sony Group Corp.	2.4%
AIB Group PLC	2.4%
SAP SE	2.3%
CaixaBank SA	2.2%
Total	26.7%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218315

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Trading Symbol

MSHNX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$65	1.20%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 65

Expense Ratio, Percent

1.20%

^[116]

AssetsNet

$ 5,508,199

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$5,508,199
# of Portfolio Holdings	71
Portfolio Turnover Rate	28%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	1.3%
Short-Term Investments	1.6%
Energy	1.8%
Consumer Staples	3.9%
Materials	6.5%
Real Estate	9.8%
Health Care	10.2%
Financials	10.5%
Industrials	16.7%
Consumer Discretionary	17.4%
Information Technology	20.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.0%
QXO, Inc.	6.9%
Royalty Pharma PLC	5.9%
Core & Main, Inc.	5.4%
Intercontinental Exchange, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.8%
Royal Gold, Inc.	4.8%
Floor & Decor Holdings, Inc.	4.3%
American Tower Corp.	3.5%
Total	59.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218316

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Trading Symbol

MSHOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$106	1.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 106

Expense Ratio, Percent

1.95%

^[117]

AssetsNet

$ 5,508,199

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$5,508,199
# of Portfolio Holdings	71
Portfolio Turnover Rate	28%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	1.3%
Short-Term Investments	1.6%
Energy	1.8%
Consumer Staples	3.9%
Materials	6.5%
Real Estate	9.8%
Health Care	10.2%
Financials	10.5%
Industrials	16.7%
Consumer Discretionary	17.4%
Information Technology	20.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.0%
QXO, Inc.	6.9%
Royalty Pharma PLC	5.9%
Core & Main, Inc.	5.4%
Intercontinental Exchange, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.8%
Royal Gold, Inc.	4.8%
Floor & Decor Holdings, Inc.	4.3%
American Tower Corp.	3.5%
Total	59.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218317

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Trading Symbol

MSHMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$46	0.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 46

Expense Ratio, Percent

0.85%

^[118]

AssetsNet

$ 5,508,199

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$5,508,199
# of Portfolio Holdings	71
Portfolio Turnover Rate	28%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	1.3%
Short-Term Investments	1.6%
Energy	1.8%
Consumer Staples	3.9%
Materials	6.5%
Real Estate	9.8%
Health Care	10.2%
Financials	10.5%
Industrials	16.7%
Consumer Discretionary	17.4%
Information Technology	20.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.0%
QXO, Inc.	6.9%
Royalty Pharma PLC	5.9%
Core & Main, Inc.	5.4%
Intercontinental Exchange, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.8%
Royal Gold, Inc.	4.8%
Floor & Decor Holdings, Inc.	4.3%
American Tower Corp.	3.5%
Total	59.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000218314

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio

Class Name

Trading Symbol

MSHPX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Permanence Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$44	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.80%

^[119]

AssetsNet

$ 5,508,199

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

28.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$5,508,199
# of Portfolio Holdings	71
Portfolio Turnover Rate	28%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Communication Services	1.3%
Short-Term Investments	1.6%
Energy	1.8%
Consumer Staples	3.9%
Materials	6.5%
Real Estate	9.8%
Health Care	10.2%
Financials	10.5%
Industrials	16.7%
Consumer Discretionary	17.4%
Information Technology	20.3%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Cloudflare, Inc.	14.0%
QXO, Inc.	6.9%
Royalty Pharma PLC	5.9%
Core & Main, Inc.	5.4%
Intercontinental Exchange, Inc.	5.0%
Landbridge Co. LLC	4.8%
ASML Holding NV	4.8%
Royal Gold, Inc.	4.8%
Floor & Decor Holdings, Inc.	4.3%
American Tower Corp.	3.5%
Total	59.4%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169221

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Trading Symbol

MUOAX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$56	1.09%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 56

Expense Ratio, Percent

1.09%

^[120]

AssetsNet

$ 392,072,837

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$392,072,837
# of Portfolio Holdings	33
Portfolio Turnover Rate	24%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Materials	1.3%
Energy	1.9%
Real Estate	3.4%
Consumer Staples	4.7%
Industrials	8.7%
Communication Services	10.8%
Consumer Discretionary	12.7%
Information Technology	26.7%
Financials	27.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	10.9%
Microsoft Corp.	7.1%
JPMorgan Chase & Co.	6.0%
Amazon.com, Inc.	5.8%
Apple, Inc.	5.7%
Alphabet, Inc.	5.6%
Netflix, Inc.	5.2%
Costco Wholesale Corp.	4.7%
Ameriprise Financial, Inc.	4.4%
Progressive Corp.	4.1%
Total	59.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169222

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Trading Symbol

MUOCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$94	1.85%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 94

Expense Ratio, Percent

1.85%

^[121]

AssetsNet

$ 392,072,837

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$392,072,837
# of Portfolio Holdings	33
Portfolio Turnover Rate	24%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Materials	1.3%
Energy	1.9%
Real Estate	3.4%
Consumer Staples	4.7%
Industrials	8.7%
Communication Services	10.8%
Consumer Discretionary	12.7%
Information Technology	26.7%
Financials	27.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	10.9%
Microsoft Corp.	7.1%
JPMorgan Chase & Co.	6.0%
Amazon.com, Inc.	5.8%
Apple, Inc.	5.7%
Alphabet, Inc.	5.6%
Netflix, Inc.	5.2%
Costco Wholesale Corp.	4.7%
Ameriprise Financial, Inc.	4.4%
Progressive Corp.	4.1%
Total	59.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169220

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Trading Symbol

MUOIX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$41	0.80%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 41

Expense Ratio, Percent

0.80%

^[122]

AssetsNet

$ 392,072,837

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$392,072,837
# of Portfolio Holdings	33
Portfolio Turnover Rate	24%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Materials	1.3%
Energy	1.9%
Real Estate	3.4%
Consumer Staples	4.7%
Industrials	8.7%
Communication Services	10.8%
Consumer Discretionary	12.7%
Information Technology	26.7%
Financials	27.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	10.9%
Microsoft Corp.	7.1%
JPMorgan Chase & Co.	6.0%
Amazon.com, Inc.	5.8%
Apple, Inc.	5.7%
Alphabet, Inc.	5.6%
Netflix, Inc.	5.2%
Costco Wholesale Corp.	4.7%
Ameriprise Financial, Inc.	4.4%
Progressive Corp.	4.1%
Total	59.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000169223

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - US Core Portfolio

Class Name

Trading Symbol

MUOSX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - US Core Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$38	0.75%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 38

Expense Ratio, Percent

0.75%

^[123]

AssetsNet

$ 392,072,837

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

24.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$392,072,837
# of Portfolio Holdings	33
Portfolio Turnover Rate	24%

Holdings [Text Block]

Sector Allocation (% of total investments)

Value	Value
Short-Term Investments	0.8%
Health Care	1.1%
Materials	1.3%
Energy	1.9%
Real Estate	3.4%
Consumer Staples	4.7%
Industrials	8.7%
Communication Services	10.8%
Consumer Discretionary	12.7%
Information Technology	26.7%
Financials	27.9%

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

NVIDIA Corp.	10.9%
Microsoft Corp.	7.1%
JPMorgan Chase & Co.	6.0%
Amazon.com, Inc.	5.8%
Apple, Inc.	5.7%
Alphabet, Inc.	5.6%
Netflix, Inc.	5.2%
Costco Wholesale Corp.	4.7%
Ameriprise Financial, Inc.	4.4%
Progressive Corp.	4.1%
Total	59.5%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000233003

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio

Class Name

Trading Symbol

MSVEX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class A	$62	1.30%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 62

Expense Ratio, Percent

1.30%

^[124]

AssetsNet

$ 1,858,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

12.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,858,075
# of Portfolio Holdings	30
Portfolio Turnover Rate	12%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	4.6%
Health Care Technology	9.0%
Health Care Equipment & Supplies	11.0%
Short-Term Investments	11.5%
Life Sciences Tools & Services	12.0%
Pharmaceuticals	15.7%
Biotechnology	36.2%

Footnote	Description
Footnote¹	Industries and/or investment types representing less than 5% of total investments.

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Eli Lilly & Co.	7.5%
Argenx SE	7.1%
Exact Sciences Corp.	6.2%
Alnylam Pharmaceuticals, Inc.	5.8%
Ascendis Pharma AS	4.7%
Align Technology, Inc.	4.4%
Thermo Fisher Scientific, Inc.	4.0%
Vertex Pharmaceuticals, Inc.	4.0%
Intuitive Surgical, Inc.	3.8%
UnitedHealth Group, Inc.	3.7%
Total	51.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000233004

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio

Class Name

Trading Symbol

MSVMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class C	$97	2.05%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 97

Expense Ratio, Percent

2.05%

^[125]

AssetsNet

$ 1,858,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

12.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,858,075
# of Portfolio Holdings	30
Portfolio Turnover Rate	12%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	4.6%
Health Care Technology	9.0%
Health Care Equipment & Supplies	11.0%
Short-Term Investments	11.5%
Life Sciences Tools & Services	12.0%
Pharmaceuticals	15.7%
Biotechnology	36.2%

Footnote	Description
Footnote¹	Industries and/or investment types representing less than 5% of total investments.

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Eli Lilly & Co.	7.5%
Argenx SE	7.1%
Exact Sciences Corp.	6.2%
Alnylam Pharmaceuticals, Inc.	5.8%
Ascendis Pharma AS	4.7%
Align Technology, Inc.	4.4%
Thermo Fisher Scientific, Inc.	4.0%
Vertex Pharmaceuticals, Inc.	4.0%
Intuitive Surgical, Inc.	3.8%
UnitedHealth Group, Inc.	3.7%
Total	51.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000233002

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio

Class Name

Trading Symbol

MSVDX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class I	$45	0.95%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 45

Expense Ratio, Percent

0.95%

^[126]

AssetsNet

$ 1,858,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

12.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,858,075
# of Portfolio Holdings	30
Portfolio Turnover Rate	12%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	4.6%
Health Care Technology	9.0%
Health Care Equipment & Supplies	11.0%
Short-Term Investments	11.5%
Life Sciences Tools & Services	12.0%
Pharmaceuticals	15.7%
Biotechnology	36.2%

Footnote	Description
Footnote¹	Industries and/or investment types representing less than 5% of total investments.

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Eli Lilly & Co.	7.5%
Argenx SE	7.1%
Exact Sciences Corp.	6.2%
Alnylam Pharmaceuticals, Inc.	5.8%
Ascendis Pharma AS	4.7%
Align Technology, Inc.	4.4%
Thermo Fisher Scientific, Inc.	4.0%
Vertex Pharmaceuticals, Inc.	4.0%
Intuitive Surgical, Inc.	3.8%
UnitedHealth Group, Inc.	3.7%
Total	51.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000233005

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio

Class Name

Trading Symbol

MSVOX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Institutional Fund, Inc. - Vitality Portfolio for the period of January 1, 2025 to June 30, 2025.

Shareholder Report Annual or Semi-Annual

Semi-Annual Shareholder Report

Additional Information [Text Block]

You can find additional information about the Fund at www.morganstanley.com/im/shareholderreports. You can also request this information by contacting us at 1-800-869-6397.

Additional Information Phone Number

1-800-869-6397

Additional Information Website

Expenses [Text Block]

What were the Fund costs for the last six months?

(based on a hypothetical $10,000 investment)

Class Name	Costs of a $10,000 investment	Costs paid as a percentage of a $10,000 investment
Class R6	$43	0.90%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 43

Expense Ratio, Percent

0.90%

^[127]

AssetsNet

$ 1,858,075

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

12.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,858,075
# of Portfolio Holdings	30
Portfolio Turnover Rate	12%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	4.6%
Health Care Technology	9.0%
Health Care Equipment & Supplies	11.0%
Short-Term Investments	11.5%
Life Sciences Tools & Services	12.0%
Pharmaceuticals	15.7%
Biotechnology	36.2%

Footnote	Description
Footnote¹	Industries and/or investment types representing less than 5% of total investments.

Largest Holdings [Text Block]

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Eli Lilly & Co.	7.5%
Argenx SE	7.1%
Exact Sciences Corp.	6.2%
Alnylam Pharmaceuticals, Inc.	5.8%
Ascendis Pharma AS	4.7%
Align Technology, Inc.	4.4%
Thermo Fisher Scientific, Inc.	4.0%
Vertex Pharmaceuticals, Inc.	4.0%
Intuitive Surgical, Inc.	3.8%
UnitedHealth Group, Inc.	3.7%
Total	51.2%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

[1]	Annualized
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[127]	Annualized

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Sector Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Country Allocation (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}

Top Ten Holdings (% of total investments)^{Footnote Referencea}