v3.25.2
Average Annual Total Returns
 12 Months Ended 58 Months Ended 60 Months Ended 120 Months Ended 139 Months Ended 172 Months Ended 203 Months Ended 271 Months Ended
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Dec. 31, 2024
Bloomberg U.S. Aggregate Bond Index (reflects no deduction for fees, expenses, or taxes)                
Prospectus [Line Items]                
Average Annual Return, Percent 1.25% (1.24%) [1] (0.33%) 1.35%        
Morningstar LSTA Performing Loan Index (reflects no deduction for fees, expenses, or taxes)                
Prospectus [Line Items]                
Average Annual Return, Percent 9.15% 7.24% [1] 6.09% 5.41%        
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 8.19%   4.20% 5.16%        
Lipper Global High Yield Funds Average                
Prospectus [Line Items]                
Average Annual Return, Percent 7.81%   3.28% 4.08%        
Bloomberg U.S. Long Credit Bond Index (reflects no deduction for fees, expenses, or taxes)                
Prospectus [Line Items]                
Average Annual Return, Percent (2.01%)   (1.92%) 2.11%        
Lipper Corporate Debt Funds BBB-Rated Average                
Prospectus [Line Items]                
Average Annual Return, Percent 2.15%   0.06% 1.94%        
T. Rowe Price Institutional Floating Rate Fund - Institutional Class [Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 9.14%   5.51% 4.97%      
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 5.46%   2.88% 2.65%      
T. Rowe Price Institutional Floating Rate Fund - Institutional Class [Member] | After Taxes on Distributions and Sales                
Prospectus [Line Items]                
Average Annual Return, Percent     3.05% 2.76%      
T. Rowe Price Institutional Floating Rate Fund-F Class [Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 9.01%   5.38% 4.84%        
Performance Inception Date           Aug. 27, 2010    
T. Rowe Price Institutional Floating Rate Fund-Z Class [Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 9.74% 7.07%        
Performance Inception Date   Mar. 10, 2020            
T. Rowe Price Institutional Floating Rate Fund | After Taxes on Distributions and Sales                
Prospectus [Line Items]                
Average Annual Return, Percent 5.32%              
T. Rowe Price Institutional High Yield Fund [Member]                
Prospectus [Line Items]                
Average Annual Return, Percent 6.80%   3.63% 4.79%        
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 3.92%   1.10% 2.16%        
T. Rowe Price Institutional High Yield Fund [Member] | After Taxes on Distributions and Sales                
Prospectus [Line Items]                
Average Annual Return, Percent 3.97%   1.65% 2.47%        
T. Rowe Price Institutional Long Duration Credit Fund [Member]                
Prospectus [Line Items]                
Average Annual Return, Percent (1.46%)   (1.41%) 2.33%        
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 (3.61%)   (3.47%) 0.13%        
T. Rowe Price Institutional Long Duration Credit Fund [Member] | After Taxes on Distributions and Sales                
Prospectus [Line Items]                
Average Annual Return, Percent (0.85%)   (1.73%) 1.01%        
[1] Return since 3/10/20.