v3.26.1
Expense Example
Jul. 27, 2026
USD ($)
T. Rowe Price Inflation Protected Bond Fund, Inc. - Investor Class [Member]  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year $ 42
Expense Example, with Redemption, 3 Years 193
Expense Example, with Redemption, 5 Years 356
Expense Example, with Redemption, 10 Years 832
T. Rowe Price Inflation Protected Bond Fund, Inc. - I Class [Member]  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 23
Expense Example, with Redemption, 3 Years 119
Expense Example, with Redemption, 5 Years 224
Expense Example, with Redemption, 10 Years 533
T. Rowe Price Inflation Protected Bond Fund, Inc. - Z Class [Member]  
Prospectus [Line Items]  
Expense Example, with Redemption, 1 Year 0
Expense Example, with Redemption, 3 Years 0
Expense Example, with Redemption, 5 Years 0
Expense Example, with Redemption, 10 Years $ 0