v3.26.1
Average Annual Total Returns
 12 Months Ended 58 Months Ended 60 Months Ended 120 Months Ended 278 Months Ended
Dec. 31, 2025
Dec. 31, 2025
 [2]
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg U.S. Aggregate Bond Index              
Prospectus [Line Items]              
Average Annual Return, Percent 7.30%   0.05% [1] (0.36%) 2.01%    
Bloomberg U.S. TIPS Index              
Prospectus [Line Items]              
Average Annual Return, Percent 7.01%   1.42% [1] 1.12% 3.09%    
Lipper Inflation Protected Bond Funds Average              
Prospectus [Line Items]              
Average Annual Return, Percent 6.40% 1.48%   1.37% 2.80%    
T. Rowe Price Inflation Protected Bond Fund, Inc. - Investor Class [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 6.64%     0.38% 2.59%    
Performance Inception Date             Oct. 31, 2002
T. Rowe Price Inflation Protected Bond Fund, Inc. - Investor Class [Member] | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent 4.56%     (1.69%) 1.09%    
T. Rowe Price Inflation Protected Bond Fund, Inc. - Investor Class [Member] | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent 3.93%     (0.56%) 1.36%    
T. Rowe Price Inflation Protected Bond Fund, Inc. - I Class [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 6.84%     0.57% 2.77%    
Performance Inception Date           Dec. 17, 2015  
T. Rowe Price Inflation Protected Bond Fund, Inc. - Z Class [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 7.08%   1.05%        
Performance Inception Date     Feb. 22, 2021        
[1] Return since 2/22/21.
[2] Return since 2/28/21.