v3.26.3
Shareholder Report, Average Annual Return (Details)
 12 Months Ended 29 Months Ended 45 Months Ended 60 Months Ended 73 Months Ended 120 Months Ended
Jul. 31, 2026
Jul. 31, 2026
Jul. 31, 2026
Jul. 31, 2026
Jul. 31, 2026
Jul. 31, 2026
C000048022 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Municipal Total Return Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 7.25%     0.23%   2.16%
C000219780 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Nuveen Impact Bond Completion Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 3.78%     (0.72%) (0.19%)  
C000238439 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Nuveen Emerging Markets Debt Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 6.39%   8.18%      
C000238440 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Nuveen High Yield Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 6.46%   8.74%      
C000238441 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Nuveen Preferred Securities and Income Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 7.33%   9.21%      
C000238442 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Nuveen Securitized Credit Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 4.30%   6.43%      
C000248080 [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Nuveen Ultra Short Municipal Managed Accounts Portfolio at NAV          
Average Annual Return, Percent 2.41% 2.70%        
Bloomberg Municipal Bond Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg Municipal Bond Index          
Average Annual Return, Percent 5.27%     0.51%   1.95%
Bloomberg U S Aggregate Bond Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Aggregate Bond Index          
Average Annual Return, Percent 2.71%   4.34% (0.40%) (0.31%)  
JP Morgan EMBI Global Diversified Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name JP Morgan EMBI Global Diversified Index          
Average Annual Return, Percent 8.81%   11.03%      
S And P Municipal Bond Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name S&P Municipal Bond Index          
Average Annual Return, Percent 5.10% 2.73%        
Bloomberg 7 Year Municipal Bond Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg 7 Year Municipal Bond Index          
Average Annual Return, Percent 2.43%     0.72%   1.84%
ICE BofA BB B U S Cash Pay High Yield Constrained Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name ICE BofA BB‑B U.S. Cash Pay High Yield Constrained Index          
Average Annual Return, Percent 5.42%   8.29%      
Preferred Securities and Income Managed Accounts Portfolio Blended Benchmark [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Preferred Securities and Income Managed Accounts Portfolio Blended Benchmark          
Average Annual Return, Percent 5.84%   8.72%      
ICE US Institutional Capital Securities Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name ICE US Institutional Capital Securities Index          
Average Annual Return, Percent 5.44%   9.06%      
Bloomberg U S Securitized Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name Bloomberg U.S. Securitized Index          
Average Annual Return, Percent 4.10%   4.72%      
SIFMA Municipal Swap Index [Member]            
Average Annual Return [Line Items]            
Line Graph and Table Measure Name SIFMA - Municipal Swap Index          
Average Annual Return, Percent 2.46% 3.02%