Expense Example	Jul. 27, 2026 USD ($)
T. Rowe Price GNMA Fund-Investor Class
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	$ 63
Expense Example, with Redemption, 3 Years	233
Expense Example, with Redemption, 5 Years	418
Expense Example, with Redemption, 10 Years	951
T. Rowe Price GNMA Fund-I Class
Prospectus [Line Items]
Expense Example, with Redemption, 1 Year	41
Expense Example, with Redemption, 3 Years	152
Expense Example, with Redemption, 5 Years	274
Expense Example, with Redemption, 10 Years	$ 630

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