v3.26.1
Average Annual Total Returns
 12 Months Ended 60 Months Ended 120 Months Ended
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Class I        
Prospectus [Line Items]        
Average Annual Return, Percent   7.30% 0.97% 2.84%
Performance Inception Date Apr. 30, 2007      
Class I | Bloomberg U.S. Aggregate Bond Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   7.30% (0.36%) 2.01%
Class I | Bloomberg U.S. TIPS Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   7.01% 1.12% 3.09%
Class R        
Prospectus [Line Items]        
Average Annual Return, Percent   6.64% 0.35% 2.23%
Performance Inception Date Apr. 30, 2007      
Class R | After Taxes on Distributions        
Prospectus [Line Items]        
Average Annual Return, Percent   4.90% (1.00%) 1.30%
Class R | After Taxes on Distributions and Sales        
Prospectus [Line Items]        
Average Annual Return, Percent   3.91% (0.31%) 1.32%
Class R | Bloomberg U.S. Aggregate Bond Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   7.30% (0.36%) 2.01%
Class R | Bloomberg U.S. TIPS Index[Member]        
Prospectus [Line Items]        
Average Annual Return, Percent [1]   7.01% 1.12% 3.09%
[1] The index returns do not reflect deductions for fees, expenses, or taxes.