Shareholder Report
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12 Months Ended |
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Dec. 31, 2025
USD ($)
Holding
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|---|
| Shareholder Report [Line Items] |
|
| Document Type |
N-CSR
|
| Amendment Flag |
false
|
| Registrant Name |
T. ROWE PRICE DIVERSIFIED MID-CAP GROWTH FUND, INC.
|
| Entity Central Index Key |
0001267862
|
| Entity Investment Company Type |
N-1A
|
| Document Period End Date |
Dec. 31, 2025
|
| C000005433 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
Diversified Mid-Cap Growth Fund
|
| Class Name |
Investor Class
|
| Trading Symbol |
PRDMX
|
| Shareholder Report Annual or Semi-Annual |
Annual Shareholder Report
|
| Additional Information [Text Block] |
You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
|
| Material Fund Change Notice [Text Block] |
|
| Additional Information Phone Number |
1‑800‑638‑5660
|
| Additional Information Email |
<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
|
| Additional Information Website |
www.troweprice.com/prospectus
|
| Expenses [Text Block] |
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
|
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Diversified Mid-Cap Growth Fund - Investor Class |
$88 |
0.84% | |
| Expenses Paid, Amount |
$ 88
|
| Expense Ratio, Percent |
0.84%
|
| Factors Affecting Performance [Text Block] |
What drove fund performance during the past 12 months?Mid-cap growth stocks rose in 2025. After a challenging start to the year, equities advanced as economic growth and corporate earnings remained favorable, investors favored artificial intelligence-related businesses, and Congress passed tax legislation that should stimulate the economy. In addition, the Federal Reserve resumed reducing short-term interest rates in the latter part of the year. Exceedingly positive stock selection contributed to performance versus the Russell Midcap Growth Index and our Lipper peer group index. In the information technology sector, electronic manufacturing services company Celestica was a very strong contributor. Stock choices among industrials and business services and health care companies also added value. Stock selection and a small overweight in real estate—such as Iron Mountain, a provider of storage and information management services, and real estate data provider CoStar Group—detracted modestly from relative results. Stock choices among consumer discretionary companies and a sector underweight also had a modest negative relative performance impact. The fund seeks long-term capital growth by investing in medium-sized companies whose earnings we believe will grow at an above-average rate. We use a disciplined, long-term-oriented approach and fundamental research to find and invest in quality companies while factoring in valuations and risks to our portfolio decisions, and we stay fully invested rather than time the markets. Notable changes in positioning during the year were focused on maintaining a broadly diversified portfolio among mid-cap growth companies in which we have high conviction while generally keeping the fund’s sector allocations in line with those of the Russell index.
|
| Performance Past Does Not Indicate Future [Text] |
The fund’s past performance is not a good predictor of the fund’s future performance.
|
| Average Annual Return [Table Text Block] |
Average Annual Total Returns
|
1 Year |
5 Years |
10 Years |
Diversified Mid-Cap Growth Fund (Investor Class) |
10.37% |
7.17% |
12.81% |
Russell 3000 Index (Regulatory Benchmark) |
17.15 |
13.15 |
14.29 |
Russell Midcap Growth Index (Strategy Benchmark) |
8.66 |
6.65 |
12.49 | The preceding line graph shows the value of a hypothetical $10,000 investment in the fund over the past 10 fiscal year periods or since inception (for funds lacking 10-year records). The fund’s performance information included in the line graph and table above is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the line graph and table may also include one or more indexes that more closely aligns to the fund's investment strategy (Strategy Benchmark(s)). The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.The fund’s past performance is not a good predictor of the fund’s future performance.Updated performance information can be found at www.troweprice.com. |
| No Deduction of Taxes [Text Block] |
Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
|
| Updated Performance Information Location [Text Block] |
Updated performance information can be found at www.troweprice.com.
|
| Distribution of Capital [Text Block] |
The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
|
| AssetsNet |
$ 4,426,322,000
|
| Holdings Count | Holding |
280
|
| Advisory Fees Paid, Amount |
$ 22,797,000
|
| InvestmentCompanyPortfolioTurnover |
51.30%
|
| Additional Fund Statistics [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$4,426,322
- Number of Portfolio Holdings280
|
| Holdings [Text Block] |
Sector Allocation (as a % of Net Assets)
Consumer Discretionary |
20.9% |
Industrials & Business Services |
20.0 |
Information Technology |
18.7 |
Health Care |
16.1 |
Financials |
9.0 |
Communication Services |
4.9 |
Utilities |
2.9 |
Energy |
2.8 |
Consumer Staples |
2.2 |
Other |
2.5 | |
| Largest Holdings [Text Block] |
Top Ten Holdings (as a % of Net Assets)
Howmet Aerospace |
3.0% |
Royal Caribbean Cruises |
2.5 |
Cencora |
2.2 |
Hilton Worldwide Holdings |
2.0 |
Cloudflare |
2.0 |
IDEXX Laboratories |
1.9 |
Carvana |
1.9 |
Vistra |
1.9 |
Vertiv Holdings |
1.9 |
Alnylam Pharmaceuticals |
1.7 | |
| Updated Prospectus Web Address |
www.troweprice.com/paperless
|
| C000190557 |
|
| Shareholder Report [Line Items] |
|
| Fund Name |
Diversified Mid-Cap Growth Fund
|
| Class Name |
I Class
|
| Trading Symbol |
RPTTX
|
| Shareholder Report Annual or Semi-Annual |
Annual Shareholder Report
|
| Additional Information [Text Block] |
You can find the fund’s prospectus, financial information on Form N‑CSR (which includes required tax information for dividends), holdings, proxy voting information, and other information atwww.troweprice.com/prospectus. You can also request this information without charge by contacting T. Rowe Price at 1‑800‑638‑5660 or info@troweprice.com or contacting your intermediary.
|
| Material Fund Change Notice [Text Block] |
|
| Additional Information Phone Number |
1‑800‑638‑5660
|
| Additional Information Email |
<span style="box-sizing: border-box; color: rgb(0, 0, 0); display: inline; flex-wrap: nowrap; font-size: 13.3333px; font-weight: 400; grid-area: auto; line-height: 17.3333px; margin: 0px; overflow: visible; text-align: justify; text-align-last: left; white-space-collapse: preserve-breaks;">info@troweprice.com</span>
|
| Additional Information Website |
www.troweprice.com/prospectus
|
| Expenses [Text Block] |
What were the fund costs for the last year? (based on a hypothetical $10,000 investment)
|
Costs of a $10,000 investment |
Costs paid as a percentage of a $10,000 investment |
Diversified Mid-Cap Growth Fund - I Class |
$71 |
0.67% | |
| Expenses Paid, Amount |
$ 71
|
| Expense Ratio, Percent |
0.67%
|
| Factors Affecting Performance [Text Block] |
What drove fund performance during the past 12 months?Mid-cap growth stocks rose in 2025. After a challenging start to the year, equities advanced as economic growth and corporate earnings remained favorable, investors favored artificial intelligence-related businesses, and Congress passed tax legislation that should stimulate the economy. In addition, the Federal Reserve resumed reducing short-term interest rates in the latter part of the year. Exceedingly positive stock selection contributed to performance versus the Russell Midcap Growth Index and our Lipper peer group index. In the information technology sector, electronic manufacturing services company Celestica was a very strong contributor. Stock choices among industrials and business services and health care companies also added value. Stock selection and a small overweight in real estate—such as Iron Mountain, a provider of storage and information management services, and real estate data provider CoStar Group—detracted modestly from relative results. Stock choices among consumer discretionary companies and a sector underweight also had a modest negative relative performance impact. The fund seeks long-term capital growth by investing in medium-sized companies whose earnings we believe will grow at an above-average rate. We use a disciplined, long-term-oriented approach and fundamental research to find and invest in quality companies while factoring in valuations and risks to our portfolio decisions, and we stay fully invested rather than time the markets. Notable changes in positioning during the year were focused on maintaining a broadly diversified portfolio among mid-cap growth companies in which we have high conviction while generally keeping the fund’s sector allocations in line with those of the Russell index.
|
| Performance Past Does Not Indicate Future [Text] |
The fund’s past performance is not a good predictor of the fund’s future performance.
|
| Average Annual Return [Table Text Block] |
Average Annual Total Returns
|
1 Year |
5 Years |
Since Inception 5/3/17 |
Diversified Mid-Cap Growth Fund (I Class) |
10.54% |
7.36% |
12.95% |
Russell 3000 Index (Regulatory Benchmark) |
17.15 |
13.15 |
14.17 |
Russell Midcap Growth Index (Strategy Benchmark) |
8.66 |
6.65 |
12.57 | The preceding line graph shows the value of a hypothetical $500,000 investment in the fund over the past 10 fiscal year periods or since inception (for funds lacking 10-year records). The fund’s performance information included in the line graph and table above is compared with a regulatory required index that represents an overall securities market (Regulatory Benchmark). In addition, the line graph and table may also include one or more indexes that more closely aligns to the fund's investment strategy (Strategy Benchmark(s)). The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.The fund’s past performance is not a good predictor of the fund’s future performance.Updated performance information can be found at www.troweprice.com. |
| Performance Inception Date |
May 03, 2017
|
| No Deduction of Taxes [Text Block] |
Neither the fund’s returns nor the index returns reflect the deduction of taxes that a shareholder would pay on fund distributions or redemptions of fund shares.
|
| Updated Performance Information Location [Text Block] |
Updated performance information can be found at www.troweprice.com.
|
| Distribution of Capital [Text Block] |
The fund's total return figures reflect the reinvestment of dividends and capital gains, if any.
|
| AssetsNet |
$ 4,426,322,000
|
| Holdings Count | Holding |
280
|
| Advisory Fees Paid, Amount |
$ 22,797,000
|
| InvestmentCompanyPortfolioTurnover |
51.30%
|
| Additional Fund Statistics [Text Block] |
What are some fund statistics? - Total Net Assets (000s)$4,426,322
- Number of Portfolio Holdings280
|
| Holdings [Text Block] |
Sector Allocation (as a % of Net Assets)
Consumer Discretionary |
20.9% |
Industrials & Business Services |
20.0 |
Information Technology |
18.7 |
Health Care |
16.1 |
Financials |
9.0 |
Communication Services |
4.9 |
Utilities |
2.9 |
Energy |
2.8 |
Consumer Staples |
2.2 |
Other |
2.5 | |
| Largest Holdings [Text Block] |
Top Ten Holdings (as a % of Net Assets)
Howmet Aerospace |
3.0% |
Royal Caribbean Cruises |
2.5 |
Cencora |
2.2 |
Hilton Worldwide Holdings |
2.0 |
Cloudflare |
2.0 |
IDEXX Laboratories |
1.9 |
Carvana |
1.9 |
Vistra |
1.9 |
Vertiv Holdings |
1.9 |
Alnylam Pharmaceuticals |
1.7 | |
| Updated Prospectus Web Address |
www.troweprice.com/paperless
|