v3.26.1
Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended 151 Months Ended 184 Months Ended 215 Months Ended 283 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent 7.30% (0.36%) 2.01%        
Morningstar LSTA Performing Loan Index (reflects no deduction for fees, expenses, or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent 6.01% 6.60% 6.02%        
Bloomberg U.S. High-Yield 2% Issuer Capped Bond Index (reflects no deduction for fees, expenses, or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent 8.62% 4.50% 6.52%        
Lipper High Yield Funds Average              
Prospectus [Line Items]              
Average Annual Return, Percent 8.02% 4.14% 5.65%        
Bloomberg U.S. Long Credit Bond Index (reflects no deduction for fees, expenses, or taxes)              
Prospectus [Line Items]              
Average Annual Return, Percent 7.77% (2.90%) 3.36%        
Lipper Corporate Debt Funds BBB-Rated Average              
Prospectus [Line Items]              
Average Annual Return, Percent 7.23% (0.47%) 2.96%        
T. Rowe Price Institutional Floating Rate Fund - Institutional Class [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 6.67% 6.37% 5.49%        
Performance Inception Date           Jan. 31, 2008  
T. Rowe Price Institutional Floating Rate Fund - Institutional Class [Member] | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent 3.59% 3.49% 3.05%        
T. Rowe Price Institutional Floating Rate Fund - Institutional Class [Member] | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent 3.89% 3.61% 3.13%        
T. Rowe Price Institutional Floating Rate Fund-F Class [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 6.52% 6.24% 5.36%        
Performance Inception Date         Aug. 27, 2010    
T. Rowe Price Institutional High Yield Fund [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 9.00% 4.43% 6.11%        
Performance Inception Date             May 31, 2002
T. Rowe Price Institutional High Yield Fund [Member] | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent 6.02% 1.77% 3.47%        
T. Rowe Price Institutional High Yield Fund [Member] | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent 5.27% 2.19% 3.53%        
T. Rowe Price Institutional Long Duration Credit Fund [Member]              
Prospectus [Line Items]              
Average Annual Return, Percent 7.63% (2.99%) 3.36%        
Performance Inception Date       Jun. 03, 2013      
T. Rowe Price Institutional Long Duration Credit Fund [Member] | After Taxes on Distributions              
Prospectus [Line Items]              
Average Annual Return, Percent 5.31% (4.97%) 1.10%        
T. Rowe Price Institutional Long Duration Credit Fund [Member] | After Taxes on Distributions and Sales              
Prospectus [Line Items]              
Average Annual Return, Percent 4.47% (3.00%) 1.76%