Expense Example	Feb. 25, 2026 USD ($)
T. Rowe Price Diversified Mid-Cap Growth Fund, Inc. - Investor Class
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 86
Expense Example, with Redemption, 3 Years	268
Expense Example, with Redemption, 5 Years	466
Expense Example, with Redemption, 10 Years	1,037
T. Rowe Price Diversified Mid-Cap Growth Fund, Inc. - I Class
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	68
Expense Example, with Redemption, 3 Years	214
Expense Example, with Redemption, 5 Years	373
Expense Example, with Redemption, 10 Years	$ 835

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

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Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear03
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

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Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instruction
-Paragraph 4

Name:	oef_ExpenseExampleYear10
Namespace Prefix:	oef_
Data Type:	dtr-types:nonNegativeMonetaryItemType
Balance Type:	na
Period Type:	duration

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 1
-Subsection a