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Goldman Sachs High Yield Municipal Fund Average Annual Total Returns - Class A C Inst Inv R6 Shares [Member]
 12 Months Ended 60 Months Ended 73 Months Ended 120 Months Ended
Mar. 31, 2026
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Dec. 31, 2025
Goldman Sachs High Yield Municipal Fund Composite Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   3.17% 1.63%   3.55%
Bloomberg Municipal Bond Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   4.25% 0.80%   2.34%
Bloomberg Municipal High Yield Bond Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   2.46% 2.18%   4.34%
Bloomberg U.S. Aggregate Bond Index[Member]          
Prospectus [Line Items]          
Average Annual Return, Percent   7.30% (0.36%) 0.83% 2.01%
Class A Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   (2.58%) 0.04%   3.16%
Performance Inception Date Apr. 03, 2000        
Class A Shares | After Taxes on Distributions          
Prospectus [Line Items]          
Average Annual Return, Percent   (2.67%) (0.06%)   3.05%
Class A Shares | After Taxes on Distributions and Sales          
Prospectus [Line Items]          
Average Annual Return, Percent   0.05% 0.76%   3.20%
Class C Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   0.28% 0.21%   2.87% [1]
Performance Inception Date Apr. 03, 2000        
Institutional Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   2.36% 1.28%   3.95%
Performance Inception Date Apr. 03, 2000        
Investor Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   2.30% 1.22%   3.91%
Performance Inception Date Jul. 30, 2010        
Class R6 Shares          
Prospectus [Line Items]          
Average Annual Return, Percent   2.37% 1.27%   3.95% [2]
Performance Inception Date Nov. 30, 2017        
[1] Class C Shares automatically convert into Class A Shares eight years after the purchase date. The 10-Year performance for Class C Shares does not reflect the conversion to Class A Shares after the first eight years of performance.
[2] Class R6 Shares commenced operations on November 30, 2017. Prior to that date, the performance of Class R6 Shares shown in the table above is that of Institutional Shares. Performance has not been adjusted to reflect the lower expenses of Class R6 Shares. Class R6 Shares would have had higher returns because: (i) Institutional Shares and Class R6 Shares represent interests in \ the same portfolio of securities; and (ii) Class R6 Shares have lower expenses.