This semi-annual shareholder report contains important information about Morgan Stanley Insight Fund 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

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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	1.16%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 62

Expense Ratio, Percent

1.16%

^[1]

AssetsNet

$ 1,479,118,856

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,479,118,856
# of Portfolio Holdings	29
Portfolio Turnover Rate	35%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	29.7%
Entertainment	5.7%
Automobiles	5.9%
Trading Companies & Distributors	7.1%
Financial Services	8.3%
Software	21.6%
Information Technology Services	21.7%

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}

Cloudflare, Inc.	12.3%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.4%
Tesla, Inc.	5.9%
ROBLOX Corp.	5.7%
AppLovin Corp.	5.2%
IonQ, Inc.	4.9%
DoorDash, Inc.	4.8%
MercadoLibre, Inc.	4.7%
Shopify, Inc.	4.7%
Total	61.0%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000155915

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Insight Fund

Class Name

Trading Symbol

MSCMX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Insight Fund 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	$101	1.90%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 101

Expense Ratio, Percent

1.90%

^[2]

AssetsNet

$ 1,479,118,856

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,479,118,856
# of Portfolio Holdings	29
Portfolio Turnover Rate	35%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	29.7%
Entertainment	5.7%
Automobiles	5.9%
Trading Companies & Distributors	7.1%
Financial Services	8.3%
Software	21.6%
Information Technology Services	21.7%

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}

Cloudflare, Inc.	12.3%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.4%
Tesla, Inc.	5.9%
ROBLOX Corp.	5.7%
AppLovin Corp.	5.2%
IonQ, Inc.	4.9%
DoorDash, Inc.	4.8%
MercadoLibre, Inc.	4.7%
Shopify, Inc.	4.7%
Total	61.0%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000006130

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Insight Fund

Class Name

Trading Symbol

CPODX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Insight Fund 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	0.89%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 48

Expense Ratio, Percent

0.89%

^[3]

AssetsNet

$ 1,479,118,856

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,479,118,856
# of Portfolio Holdings	29
Portfolio Turnover Rate	35%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	29.7%
Entertainment	5.7%
Automobiles	5.9%
Trading Companies & Distributors	7.1%
Financial Services	8.3%
Software	21.6%
Information Technology Services	21.7%

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}

Cloudflare, Inc.	12.3%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.4%
Tesla, Inc.	5.9%
ROBLOX Corp.	5.7%
AppLovin Corp.	5.2%
IonQ, Inc.	4.9%
DoorDash, Inc.	4.8%
MercadoLibre, Inc.	4.7%
Shopify, Inc.	4.7%
Total	61.0%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000216311

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Insight Fund

Class Name

Trading Symbol

MBIRX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Insight Fund 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	$44	0.83%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.83%

^[4]

AssetsNet

$ 1,479,118,856

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,479,118,856
# of Portfolio Holdings	29
Portfolio Turnover Rate	35%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	29.7%
Entertainment	5.7%
Automobiles	5.9%
Trading Companies & Distributors	7.1%
Financial Services	8.3%
Software	21.6%
Information Technology Services	21.7%

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}

Cloudflare, Inc.	12.3%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.4%
Tesla, Inc.	5.9%
ROBLOX Corp.	5.7%
AppLovin Corp.	5.2%
IonQ, Inc.	4.9%
DoorDash, Inc.	4.8%
MercadoLibre, Inc.	4.7%
Shopify, Inc.	4.7%
Total	61.0%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000006129

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Insight Fund

Class Name

Trading Symbol

CPOCX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Insight Fund 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	1.65%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 88

Expense Ratio, Percent

1.65%

^[5]

AssetsNet

$ 1,479,118,856

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,479,118,856
# of Portfolio Holdings	29
Portfolio Turnover Rate	35%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	29.7%
Entertainment	5.7%
Automobiles	5.9%
Trading Companies & Distributors	7.1%
Financial Services	8.3%
Software	21.6%
Information Technology Services	21.7%

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}

Cloudflare, Inc.	12.3%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.4%
Tesla, Inc.	5.9%
ROBLOX Corp.	5.7%
AppLovin Corp.	5.2%
IonQ, Inc.	4.9%
DoorDash, Inc.	4.8%
MercadoLibre, Inc.	4.7%
Shopify, Inc.	4.7%
Total	61.0%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

C000126925

Shareholder Report [Line Items]

Fund Name

Morgan Stanley Insight Fund

Class Name

Trading Symbol

MCRTX

Annual or Semi-Annual Statement [Text Block]

This semi-annual shareholder report contains important information about Morgan Stanley Insight Fund 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	0.83%^{Footnote Reference1}

Footnote	Description
Footnote¹	Annualized

Expenses Paid, Amount

$ 44

Expense Ratio, Percent

0.83%

^[6]

AssetsNet

$ 1,479,118,856

Holdings Count | Holding

InvestmentCompanyPortfolioTurnover

35.00%

Additional Fund Statistics [Text Block]

Key Fund Statistics

Total Net Assets	$1,479,118,856
# of Portfolio Holdings	29
Portfolio Turnover Rate	35%

Holdings [Text Block]

Industry Weightings (% of total investments)

Value	Value
Other^{Footnote Reference1}	29.7%
Entertainment	5.7%
Automobiles	5.9%
Trading Companies & Distributors	7.1%
Financial Services	8.3%
Software	21.6%
Information Technology Services	21.7%

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}

Cloudflare, Inc.	12.3%
MicroStrategy, Inc.	6.4%
Affirm Holdings, Inc.	6.4%
Tesla, Inc.	5.9%
ROBLOX Corp.	5.7%
AppLovin Corp.	5.2%
IonQ, Inc.	4.9%
DoorDash, Inc.	4.8%
MercadoLibre, Inc.	4.7%
Shopify, Inc.	4.7%
Total	61.0%

Footnote	Description
Footnote^a	Excluding cash equivalents.

Updated Prospectus Web Address

[1]	Annualized
[2]	Annualized
[3]	Annualized
[4]	Annualized
[5]	Annualized
[6]	Annualized

What were the Fund costs for the last six months?

Key Fund Statistics

Industry Weightings (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Industry Weightings (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Industry Weightings (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Industry Weightings (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Industry Weightings (% of total investments)

Top Ten Holdings (% of total investments)Footnote Referencea

What were the Fund costs for the last six months?

Key Fund Statistics

Industry Weightings (% 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}