v3.26.1
Shareholder Report
12 Months Ended
Mar. 31, 2026
USD ($)
Holding
Shareholder Report [Line Items]  
Document Type N-CSR/A
Amendment Flag false
Registrant Name Nushares ETF Trust
Entity Central Index Key 0001635073
Entity Investment Company Type N-1A
Document Period End Date Mar. 31, 2026
C000256223 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen High Yield Municipal Income ETF
Class Name Nuveen High Yield Municipal Income ETF
Trading Symbol NHYM
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Nuveen High Yield Municipal Income ETF for the period of April 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses. You can also request this information by contacting us at (800) 257‑8787.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 257‑8787
Additional Information Website https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
  Costs paid as a percentage of
$10,000 investment*
     
Nuveen High Yield Municipal Income ETF
  $36    0.35%
* Annualized for period less than one year.
Expenses Paid, Amount $ 36
Expense Ratio, Percent 0.35% [1]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen High Yield Municipal Income ETF returned 3.54% for Common Shares at net asset value (NAV) for the 12 months ended March 31, 2026. The Fund performed in line with the S&P Municipal Yield Index, which returned 3.63%.
 
Top contributors to relative performance
 
Underweight to bonds with durations less than six years.
 
Overweight to bonds rated AAA, A and BBB, as well as an underweight to bonds rated BB and B.
 
Overweight to incremental tax bonds.
 
Security selection.
 
Top detractors from relative performance
 
Underweight to the health care sector.
 
Underweight to the housing sector.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
   
     1‑Year    Since Inception
(1/22/25)
     
NAV
   3.54%    2.97%
     
S&P Municipal Bond Index
   4.32%    3.44%
     
S&P Municipal Yield Index
   3.63%    3.06%
Performance Inception Date Jan. 22, 2025
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 117,209,461
Holdings Count | Holding 235
Advisory Fees Paid, Amount $ 319,658
Investment Company Portfolio Turnover 48.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of March 31, 2026)
Fund net assets
     $117,209,461  
Total number of portfolio holdings
     235  
Portfolio turnover (%)
     48%  
Total management fees paid for the year
     $    319,658  
Holdings [Text Block]
LOGO
LOGO
  (1)
The ratings disclosed are the lowest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the lowest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by July 31, 2026 at https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by July 31, 2026 at https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses
C000256224 [Member]  
Shareholder Report [Line Items]  
Fund Name Nuveen Municipal Income ETF
Class Name Nuveen Municipal Income ETF
Trading Symbol NUMI
Security Exchange Name NYSEArca
Annual or Semi-Annual Statement [Text Block] This annual shareholder report contains important information about the Nuveen Municipal Income ETF for the period of April 1, 2025 to March 31, 2026.
Shareholder Report Annual or Semi-Annual annual shareholder report
Additional Information [Text Block] You can find additional information at https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses. You can also request this information by contacting us at (800) 257‑8787.
Material Fund Change Notice [Text Block]
This report describes changes to the Fund that occurred during the reporting period.
Additional Information Phone Number (800) 257‑8787
Additional Information Website https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses
Expenses [Text Block]
What were the Fund costs for the last year? (based on a hypothetical $10,000 investment)
   
   
Cost of a 
$10,000 investment 
  Costs paid as a percentage of
$10,000 investment*
     
Nuveen Municipal Income ETF
  $31    0.30%
* Annualized for period less than one year.
Expenses Paid, Amount $ 31
Expense Ratio, Percent 0.30% [2]
Factors Affecting Performance [Text Block]
How did the Fund perform last year? What affected the Fund’s performance?
Performance Highlights
 
The Nuveen Municipal Income ETF returned 4.38% for Common Shares at net asset value (NAV) for the 12 months ended March 31, 2026. The Fund performed in line with the S&P Municipal Bond Index, which returned 4.32%.
 
Top contributors to relative performance
 
Underweight to bonds with durations less than two years and overweight in bonds with durations greater than eight years.
 
Underweight to tobacco settlement bonds.
 
Security selection.
 
Top detractors from relative performance
 
Sector allocations in housing, industrial development revenue, transportation and health care.
 
Overweight to non‑rated bonds and an underweight to AAA‑rated and AA‑rated bonds.
Performance Past Does Not Indicate Future [Text] Performance data shown represents past performance and does not predict or guarantee future results.
Line Graph [Table Text Block]
LOGO
Average Annual Return [Table Text Block]
Average Annual Total Returns
   
     1‑Year    Since Inception
(1/22/25)
     
NAV
   4.38%    3.06%
     
S&P Municipal Bond Index
   4.32%    3.44%
Performance Inception Date Jan. 22, 2025
No Deduction of Taxes [Text Block] The graph and table do not reflect the deduction of taxes that a shareholder would pay on Fund distributions or redemption of Fund Shares.
Updated Performance Information Location [Text Block] For most recent month‑end performance, go to https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses or call (800) 257‑8787.
Net Assets $ 76,544,211
Holdings Count | Holding 260
Advisory Fees Paid, Amount $ 188,956
Investment Company Portfolio Turnover 81.00%
Additional Fund Statistics [Text Block]
Fund Statistics (as of March 31, 2026)
Fund net assets
     $76,544,211  
Total number of portfolio holdings
     260  
Portfolio turnover (%)
     81%  
Total management fees paid for the year
     $   188,956  
Holdings [Text Block]
LOGO
LOGO
  (1)
The ratings disclosed are the lowest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Credit Ratings Selection [Text Block] The ratings disclosed are the lowest rating given by one of the following national rating agencies: Standard & Poor’s (S&P), Moody’s Investors Service, Inc. (Moody’s) or Fitch, Inc (Fitch). This treatment of split-rated securities may differ from that used for other purposes, such as for Fund investment policies. Credit ratings are subject to change. AAA, AA, A, and BBB are investment grade ratings; BB, B, CCC, CC, C and D are below-investment grade ratings. Holdings designated N/R are not rated by these national ratings agencies.
Material Fund Change [Text Block]
How has the Fund changed?
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by July 31, 2026 at https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses or upon request at (800) 257‑8787.
Summary of Change Legend [Text Block]
For more complete information, you may review the Fund’s next prospectus, which is expected to be available by July 31, 2026 at https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses or upon request at (800) 257‑8787.
Updated Prospectus Phone Number (800) 257‑8787
Updated Prospectus Web Address https://www.nuveen.com/en‑us/exchange‑traded‑funds/prospectuses
[1] Annualized for period less than one year.
[2] Annualized for period less than one year.