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               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;/div&gt;
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            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;0.01%&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
         &lt;tr&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Total Annual Fund Operating Expenses&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;&lt;b&gt;0.19%&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
         &lt;tr&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Fee Waivers&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;(0.00)%&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
         &lt;tr&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Total Annual Fund Operating Expenses After Fee Waivers&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:7pt;;"&gt;&lt;sup&gt;&lt;b&gt;1&lt;/b&gt;&lt;/sup&gt;&lt;/span&gt;
               &lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;&lt;b&gt;0.19%&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:6pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
      &lt;/table&gt;&lt;/div&gt;</oef:AnnualFundOperatingExpensesTableTextBlock>
    <oef:OperatingExpensesCaption
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2530"
      xml:lang="en-US">Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)</oef:OperatingExpensesCaption>
    <oef:ManagementFeesOverAssets
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18849"
      unitRef="RATIO">0.0018</oef:ManagementFeesOverAssets>
    <oef:DistributionAndService12b1FeesOverAssets
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18850"
      unitRef="RATIO">0</oef:DistributionAndService12b1FeesOverAssets>
    <oef:OtherExpensesOverAssets
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18851"
      unitRef="RATIO">0.0001</oef:OtherExpensesOverAssets>
    <oef:ExpensesOverAssets
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18852"
      unitRef="RATIO">0.0019</oef:ExpensesOverAssets>
    <oef:FeeWaiverOrReimbursementOverAssets
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18853"
      unitRef="RATIO">-0</oef:FeeWaiverOrReimbursementOverAssets>
    <oef:NetExpensesOverAssets
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="foot-12919_1862518-1021"
      unitRef="RATIO">0.0019</oef:NetExpensesOverAssets>
    <oef:ExpenseExampleHeading
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2630"
      xml:lang="en-US">Example of Expenses</oef:ExpenseExampleHeading>
    <oef:ExpenseExampleNarrativeTextBlock
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2634"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;The example below is intended to help you compare the costs of investing in the Fund with the costs of investing in &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;other funds. The example assumes a $10,000 initial investment, 5% annual total return, and that fees and expenses &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;remain the same as in the tables above. The table does not take into account brokerage commissions that you may pay &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;on purchases and sales of shares of the Fund. Although your actual costs may be higher or lower, based on these &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;assumptions, your costs would be:&lt;/span&gt;&lt;/div&gt;</oef:ExpenseExampleNarrativeTextBlock>
    <oef:ExpenseExampleWithRedemptionTableTextBlock
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2644"
      xml:lang="en-US">&lt;div&gt;
      &lt;table cellspacing="0" style="width:100%;cellspacing:0;padding-bottom:2pt;padding-top:0pt;margin-left:0pt;"&gt;
         &lt;tr style="height:1px;"&gt;
            &lt;td style="height:1px;width:40%"&gt;&lt;/td&gt;
            &lt;td style="height:1px;width:14%"&gt;&lt;/td&gt;
            &lt;td style="height:1px;width:14%"&gt;&lt;/td&gt;
            &lt;td style="height:1px;width:16%"&gt;&lt;/td&gt;
            &lt;td style="height:1px;width:16%"&gt;&lt;/td&gt;
         &lt;/tr&gt;
         &lt;tr&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
         &lt;tr&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:10pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;ASSUMING YOU SOLD YOUR SHARES, YOU &lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;WOULD PAY:&lt;/b&gt;&lt;/span&gt;
               &lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:10pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;AFTER 1 &lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;YEAR&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:10pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;AFTER 3 &lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;YEARS&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:10pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;AFTER 5 &lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;YEARS&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="border-bottom:1pt solid #333333;vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:10pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;AFTER 10 &lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;YEARS&lt;/b&gt;&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
         &lt;tr&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:left;text-align:left;padding-right:2pt;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&#160;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;$19&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;$61&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;$107&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td colspan="1" style="vertical-align:bottom"&gt;
               &lt;div style="background-color:#FFFFFF;padding-left:2pt;padding-top:1pt;padding-bottom:0;align:right;text-align:right;padding-right:6%;font-family:Arial, Helvetica, sans-serif;font-size:10pt;margin-top:0pt;margin-bottom:0;"&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;$243&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
      &lt;/table&gt;&lt;/div&gt;</oef:ExpenseExampleWithRedemptionTableTextBlock>
    <oef:ExpenseExampleByYearCaption
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2667"
      xml:lang="en-US">ASSUMING YOU SOLD YOUR SHARES, YOU WOULD PAY:</oef:ExpenseExampleByYearCaption>
    <oef:ExpenseExampleYear01
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18855"
      unitRef="USD">19</oef:ExpenseExampleYear01>
    <oef:ExpenseExampleYear03
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18856"
      unitRef="USD">61</oef:ExpenseExampleYear03>
    <oef:ExpenseExampleYear05
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18857"
      unitRef="USD">107</oef:ExpenseExampleYear05>
    <oef:ExpenseExampleYear10
      contextRef="c_12919_UltraShortMunicipalETF_ClassAllspringUltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18858"
      unitRef="USD">243</oef:ExpenseExampleYear10>
    <oef:PortfolioTurnoverHeading
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2712"
      xml:lang="en-US">Portfolio Turnover</oef:PortfolioTurnoverHeading>
    <oef:PortfolioTurnoverTextBlock
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2716"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;The Fund pays transaction costs, such as commissions, when it buys and sells securities (or &#x201c;turns over&#x201d; its portfolio). A &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;higher portfolio turnover rate may indicate higher transaction costs and may result in higher taxes when Fund shares &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;are held in a taxable account. These costs, which are not reflected in annual fund operating expenses or in the &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;example, affect the Fund&#x2019;s performance. During the most recent fiscal year, the Fund&#x2019;s portfolio turnover rate was &lt;/span&gt;&lt;span style="font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;"&gt;109&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;%&#160;&#160;of the average value of its portfolio.&lt;/span&gt;&lt;/div&gt;</oef:PortfolioTurnoverTextBlock>
    <oef:PortfolioTurnoverRate
      contextRef="c_12919_UltraShortMunicipalETFMember"
      decimals="INF"
      id="ixv-18859"
      unitRef="RATIO">1.09</oef:PortfolioTurnoverRate>
    <oef:StrategyHeading
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2745"
      xml:lang="en-US">Principal Investment Strategies</oef:StrategyHeading>
    <oef:StrategyNarrativeTextBlock
      contextRef="c_12919_UltraShortMunicipalETFMember"
      id="ixv-2749"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Under normal circumstances, we invest:&lt;/span&gt;&lt;/div&gt;&lt;div&gt;
      &lt;table cellspacing="0" style="padding-top:6pt;margin-left:0%;" width="100%"&gt;
         &lt;tr&gt;
            &lt;td style="color:#000000;padding-top:0pt;width:2%;padding-bottom:0pt;padding-left:0pt;text-align:left;vertical-align:top;size:3;line-height:9pt;"&gt;
               &lt;div style="font-size:16pt;font-family:Arial, Helvetica, sans-serif;"&gt;&#x2022;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td style="vertical-align:top;padding-bottom:0pt;padding-top:0pt;width:98%;padding-left:2pt;align:left;vertical-align:top;text-align:left;"&gt;
               &lt;div style="font-size:10pt;font-family:Arial, Helvetica, sans-serif;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;at least 80% of the Fund&#x2019;s net assets plus borrowings for investment purposes in municipal securities whose interest &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;is exempt from federal income tax, but not necessarily federal alternative minimum tax (&#x201c;AMT&#x201d;)&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; (this strategy may &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;only be changed with the approval of shareholders);&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
      &lt;/table&gt;&lt;/div&gt;&lt;div&gt;
      &lt;table cellspacing="0" style="padding-top:1pt;margin-left:0%;" width="100%"&gt;
         &lt;tr&gt;
            &lt;td style="color:#000000;padding-top:0pt;width:2%;padding-bottom:0pt;padding-left:0pt;text-align:left;vertical-align:top;size:3;line-height:9pt;"&gt;
               &lt;div style="font-size:16pt;font-family:Arial, Helvetica, sans-serif;"&gt;&#x2022;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td style="vertical-align:top;padding-bottom:0pt;padding-top:0pt;width:98%;padding-left:2pt;align:left;vertical-align:top;text-align:left;"&gt;
               &lt;div style="font-size:10pt;font-family:Arial, Helvetica, sans-serif;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;up to 20% of the Fund&#x2019;s total assets in securities whose interest is subject to federal&#160;&#160;AMT; and&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
      &lt;/table&gt;&lt;/div&gt;&lt;div&gt;
      &lt;table cellspacing="0" style="padding-top:1pt;margin-left:0%;" width="100%"&gt;
         &lt;tr&gt;
            &lt;td style="color:#000000;padding-top:0pt;width:2%;padding-bottom:0pt;padding-left:0pt;text-align:left;vertical-align:top;size:3;line-height:9pt;"&gt;
               &lt;div style="font-size:16pt;font-family:Arial, Helvetica, sans-serif;"&gt;&#x2022;&lt;/div&gt;
            &lt;/td&gt;
            &lt;td style="vertical-align:top;padding-bottom:0pt;padding-top:0pt;width:98%;padding-left:2pt;align:left;vertical-align:top;text-align:left;"&gt;
               &lt;div style="font-size:10pt;font-family:Arial, Helvetica, sans-serif;"&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;up to 10% of the Fund&#x2019;s total assets in below investment-grade municipal securities.&lt;/span&gt;&lt;/div&gt;
            &lt;/td&gt;
         &lt;/tr&gt;
      &lt;/table&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;To the extent the Fund uses derivatives, when such instruments provide investment exposure to the investments set &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;forth in the first bullet above or exposure to one or more market risk factors associated with such investments, the &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Fund may include such derivatives in complying with the 80% requirement set out in this bullet.&lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;We invest principally in short-term municipal securities of states, territories and possessions of the United States whose &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;interest is exempt from federal income tax, but not necessarily federal AMT. Some of the securities may be below &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;investment grade or may be unrated and deemed by us to be of comparable quality. We may also invest a portion of &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;the Fund&#x2019;s assets in securities whose interest is subject to federal AMT. We may use futures for duration and yield curve &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;management. While we may purchase securities of any maturity, under normal circumstances, we expect the Fund&#x2019;s &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;dollar-weighted average effective maturity to be 1 year or less.&lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;We use a combination of top-down and bottom-up research to cover the four main elements of total return: duration &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;management, yield curve positioning, sector and credit quality allocation, and security selection. Our top-down &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;analysis involves an evaluation of&#160;&#160;macroeconomic factors that may include, among others, the pace of economic &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;growth, employment conditions, inflation, and monetary and fiscal policy. Our bottom-up analysis, which involves &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;intensive research into the credit fundamentals of individual issuers and the relative value of individual issues, is used &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;to uncover solid investment opportunities. Securities are selected based on several factors, including, among others, &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;improving financial trends, positive industry and sector dynamics, improving economic conditions, and specific &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;demographic trends. Securities may be sold based on relative value considerations and could be replaced with a &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;security that presents a better value or risk/reward profile. A security may also be sold due to changes in credit &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;characteristics or outlook, as well as changes in portfolio strategy or cash flow needs.&lt;/span&gt;&lt;/div&gt;</oef:StrategyNarrativeTextBlock>
    <fnd:NmRule35d1EightyPctInvstmntPlcyTextBlock
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      xml:lang="en-US">&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Under normal circumstances, we invest:&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;at least 80% of the Fund&#x2019;s net assets plus borrowings for investment purposes in municipal securities whose interest &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;is exempt from federal income tax, but not necessarily federal alternative minimum tax (&#x201c;AMT&#x201d;)&lt;/span&gt;</fnd:NmRule35d1EightyPctInvstmntPlcyTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_315Member"
      id="ixv-2825"
      xml:lang="en-US">&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;An investment in the Fund may lose money&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;,&#160;&#160;is not a deposit of a bank or its affiliates, is not insured or guaranteed by &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;the Federal Deposit Insurance Corporation or any other governmental agency&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_308Member"
      id="ixv-2826"
      xml:lang="en-US">&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;An investment in the Fund may lose money&lt;/span&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_316Member"
      id="ixv-2833"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Market Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; The values of, and/or the income generated by, securities held by the Fund may decline due to general &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;market conditions or other factors, including those directly involving the issuers of such securities. Securities markets &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;are volatile and may decline significantly in response to adverse issuer, regulatory, political, or economic &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;developments. Different sectors of the market and different security types may react differently to such developments.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_317Member"
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      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Debt Securities Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; Debt securities are subject to credit risk and interest rate risk. Credit risk is the possibility that the &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;issuer or guarantor of a debt security may be unable, or perceived to be unable or unwilling, to pay interest or repay &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;principal when they become due. In these instances, the value of an investment could decline and the Fund could lose &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;money. Credit risk increases as an issuer&#x2019;s credit quality or financial strength declines. Interest rate risk is the possibility &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;that interest rates will change over time. When interest rates rise, the value of debt securities tends to fall. The longer &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;the terms of the debt securities held by a Fund, the more the Fund is subject to this risk. If interest rates decline, &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;interest that the Fund is able to earn on its investments in debt securities may also decline, which could cause the Fund &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;to reduce the dividends it pays to shareholders, but the value of those securities may increase. Very low or negative &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;interest rates may magnify interest rate risk.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_318Member"
      id="ixv-2856"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Municipal Securities Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; Municipal securities may be fully or partially backed or enhanced by the taxing authority of &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;a local government, by the current or anticipated revenues from a specific project or specific assets, or by the credit of, &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;or liquidity enhancement provided by, a private issuer. Various types of municipal securities are often related in such a &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;way that political, economic or business developments affecting one obligation could affect other municipal securities &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;held by a Fund.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_415Member"
      id="ixv-2866"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Authorized Participant Concentration Risk.&#160;&#160;&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Only an Authorized Participant (as described in the &#x201c;Creation Unit &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Transactions&#x201d; section of the Prospectus) may engage in creation or redemption transactions directly with the Fund, &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;and Authorized Participants are not obligated to engage in creation and/or redemption transactions. The Fund has a &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;limited number of institutions that may act as Authorized Participants on an agency basis (i.e., on behalf of other &lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;market participants). To the extent that Authorized Participants exit the business or are unable or unwilling to proceed &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;with creation or redemption orders with respect to the Fund and no other Authorized Participant is willing or able to &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;step forward to create or redeem, Fund shares may be more likely to trade at a premium (i.e. higher) or discount (i.e. &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;lower) to NAV and possibly face trading halts or delisting. Authorized Participant concentration risk may be heightened &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;for exchange-traded funds (&#x201c;ETFs&#x201d;) that invest in securities issued by non-U.S. issuers or other securities or instruments &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;that have lower trading volumes.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
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      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Derivatives Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; The use of derivatives, such as futures, options and swap agreements, can lead to losses, including &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;those magnified by leverage, particularly when derivatives are used to enhance return rather than mitigate risk. Certain &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;derivative instruments may be difficult to sell when the portfolio manager believes it would be appropriate to do so, or &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;the other party to a derivative contract may be unwilling or unable to fulfill its contractual obligations.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
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      id="ixv-2913"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Futures Contracts Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; A Fund that uses futures contracts, which are a type of derivative, is subject to the risk of loss &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;caused by unanticipated market movements. In addition, there may at times be an imperfect correlation between the &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;movement in the prices of futures contracts and the value of their underlying instruments or indexes, and there may at &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;times not be a liquid secondary market for certain futures contracts.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_321Member"
      id="ixv-2922"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;High Yield Securities Risk&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;. High yield securities and unrated securities of similar credit quality (commonly known as &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&#x201c;junk bonds&#x201d;) are considered speculative and have a much greater risk of default or of not returning principal and their &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;values tend to be more volatile than higher-rated securities with similar maturities.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_414Member"
      id="ixv-2930"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Market Trading Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; The Fund faces numerous market trading risks, including the potential lack of an active market for &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Fund shares or the Fund&#x2019;s underlying portfolio securities, losses from trading in secondary markets, periods of high &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;volatility and disruptions in the creation/redemption process. These factors, among others, may lead to the Fund&#x2019;s &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;shares trading at a premium (i.e. higher) or discount (i.e. lower) to the Fund&#x2019;s&#160;&#160;NAV. Accordingly, if a shareholder &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;purchases Fund shares at a time when the market price is at a premium to the NAV, or sells shares at a time when the &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;market price is at a discount to the NAV, the shareholder may sustain losses.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_323Member"
      id="ixv-2941"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Management Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; Investment decisions,&#160;&#160;techniques, analyses or models implemented by a Fund&#x2019;s manager or &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;sub-adviser in seeking to achieve the Fund&#x2019;s investment objective may not produce expected returns, may cause the &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Fund&#x2019;s shares to lose value or may cause the Fund to underperform other funds with similar investment objectives.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
      contextRef="c_12919_UltraShortMunicipalETF_325Member"
      id="ixv-2949"
      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;New Fund Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; The Fund is a new fund, with a limited or no operating history and a small asset base. There can be no &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;assurance that the Fund will grow to or maintain a viable size. At lower asset levels, certain of the Fund&#x2019;s expenses and &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;its portfolio transaction costs may be higher than those of a fund with a larger asset base. To the extent that the Fund &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;does not grow to or maintain a viable size, it may be liquidated, and the expenses, timing and tax consequences of &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;such liquidation may not be favorable to some shareholders.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
    <oef:RiskTextBlock
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      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Operational Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; The Fund is exposed to operational risks arising from a number of factors, including, but not limited &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;to, human error, processing and communication errors, errors of the Fund&#x2019;s service providers, Authorized Participants, &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;market makers, counterparties or other third-parties, failed or inadequate processes and computer, technology or &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;systems failures.&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
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      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;&lt;b&gt;Valuation Risk.&lt;/b&gt;&lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt; The price the Fund could receive upon the sale of a security or other asset may differ from the Fund&#x2019;s &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;valuation of the security or other asset, particularly for securities or other assets that trade in low volume or volatile &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;markets or that are valued using a fair value methodology as a result of trade suspensions or for other reasons. In &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;addition, to the extent that these securities or other assets held by the Fund trade on foreign exchanges or in foreign &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;markets that may be closed when the securities exchange on which the Fund&#x2019;s shares trade is open, there are likely to &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;be deviations between the current price of such security or other asset and the last quoted price for the security or &lt;/span&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;other asset (i.e., the Fund&#x2019;s quote from the closed foreign market).&lt;/span&gt;&lt;/div&gt;</oef:RiskTextBlock>
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      xml:lang="en-US">Performance</oef:BarChartAndPerformanceTableHeading>
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      xml:lang="en-US">&lt;div&gt;&lt;span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:9.02pt;;"&gt;Because the Fund does not have annual returns for at least one calendar year, there is no performance to report.&lt;/span&gt;&lt;/div&gt;</oef:PerformanceNarrativeTextBlock>
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        <link:footnote id="WSF_12919_1862518_305809" xlink:label="WSF_12919_1862518_305809" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en"><xhtml:table style="padding-top:5pt;width:100%;cellspacing:0;"><xhtml:tr><xhtml:td style="vertical-align:top;font-family:Arial, Helvetica, sans-serif;font-size:6pt;text-align:left;align:left;width:2%;"><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">1.</xhtml:span></xhtml:td><xhtml:td style="padding-bottom:0pt;padding-top:-10.02pt;padding-left:2pt;padding-right:0pt;"><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">The investment management agreement between the Fund and Allspring Funds Management, LLC utilizes a unitary fee </xhtml:span><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">arrangement pursuant to which Allspring Funds Management, LLC has agreed to pay all expenses incurred by, and appropriately </xhtml:span><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">allocated to, the Fund, excluding only: the management fee payable to Allspring Funds Management, LLC; brokerage expenses and </xhtml:span><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">other expenses incurred in connection with the execution of portfolio transactions; interest charges on any borrowings, dividends </xhtml:span><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">and other expenses on securities sold short; taxes; payments under the Fund&#x2019;s Rule 12b-1 plan (if any); proxy and shareholder </xhtml:span><xhtml:span style="clear:both;font-family:Arial, Helvetica, sans-serif;font-size:8.02pt;;">meeting expenses; litigation expenses; extraordinary expenses; and acquired fund fees and expenses.</xhtml:span></xhtml:td></xhtml:tr></xhtml:table></link:footnote>
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