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    <oef:AnnlOrSemiAnnlStatementTextBlock contextRef="C000130874_ClassMember" id="ixv-136">This annual shareholder report contains information about Fidelity&#xae; Series Commodity Strategy Fund for the period August 1, 2024 to July 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
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    <oef:AddlInfoTextBlock contextRef="C000130874_ClassMember" id="ixv-143">You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544.</oef:AddlInfoTextBlock>
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&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(based on hypothetical $10,000 investment)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;FUND COST (PREVIOUS YEAR)&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:45%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs of a $10,000 investment&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs paid as a percentage of a $10,000 investment &lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:45%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; Series Commodity Strategy Fund&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$ &lt;/span&gt;1&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;0.00&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;"&gt;A&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
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&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:6px;color:#000000;font-style:normal;vertical-align:4px;font-weight:normal;"&gt;A &lt;/span&gt;&lt;span style="font-family:'Fidelity Sans Cd';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Amount represents less than 0.005%&lt;/span&gt;&lt;/div&gt;
&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
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    <oef:FactorsAffectingPerfTextBlock contextRef="C000130874_ClassMember" id="ixv-203">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;What affected the Fund's performance this period?&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;For the 12 months ending July 31, 2025, most commodities gained value. Against a backdrop of tariff and geopolitical uncertainty and a weakening U.S. dollar, investors encountered a significant gap between the best- and worst-performing commodity types for the fiscal year. The following returns are stated on a total return basis.&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;For the full 12 months, the fund benefited from positive results from precious metals (+32%), including gains of roughly 34% and 25%, respectively, for gold and silver. Industrial metals also had a positive result, gaining roughly 3%. Within the sector, aluminum (+14%), zinc (+5%) and copper (+3%) enjoyed the strongest performance, while nickel (-11%) and lead (-8%) lost value.&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Livestock, meanwhile, gained 25%, as tight cattle supply and healthy demand led to strength in the price of live cattle (+30%). Lean hogs also advanced (+18%).&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Energy rose about 3%, boosted by an increase in natural gas (+5%). Meanwhile, West Texas intermediate crude oil (+4%) and Brent crude oil (+1%) more modestly gained.&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Meanwhile, agriculture gained 4% overall, led by coffee (+43%). Grains posted negative results, including soybeans (-2%), corn (-1%), soybean meal (-18%), wheat (-10%) and Kansas City wheat (-11%).&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock contextRef="C000130874_ClassMember" id="ixv-224">How did the Fund perform over the past 10 years?

 &#160;&#160;
CUMULATIVE PERFORMANCE
July 31, 2015 through July 31, 2025.
Initial investment of $10,000.
Fidelity&#xae; Series Commodity Strategy Fund


$10,000

$9,142


$9,177


$9,385


$8,837


$7,801


$10,908


$13,800


$12,657


$12,022


$13,133



Bloomberg Commodity Total Return Index


$10,000

$9,202


$9,273


$9,526


$9,015


$7,927


$11,120


$14,147


$13,032


$12,358


$13,558



MSCI ACWI (All Country World Index) Index


$10,000

$9,997


$11,750


$13,088


$13,529


$14,560


$19,452


$17,470


$19,798


$23,247


$27,024



&#160;

2015

2016

2017

2018

2019

2020

2021

2022

2023

2024

2025









&#160;
The fund has begun comparing its performance to the MSCI ACWI (All Country World Index) Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.</oef:LineGraphTableTextBlock>
    <oef:LineGraphAndTableMeasureName contextRef="C000130874_LG_ClassMember_11YR" id="ixv-243">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; Series Commodity Strategy Fund&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2015"
      decimals="0"
      id="ixv-19539"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2016"
      decimals="0"
      id="ixv-19540"
      unitRef="usd">9142</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2017"
      decimals="0"
      id="ixv-19541"
      unitRef="usd">9177</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2018"
      decimals="0"
      id="ixv-19542"
      unitRef="usd">9385</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2019"
      decimals="0"
      id="ixv-19543"
      unitRef="usd">8837</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2020"
      decimals="0"
      id="ixv-19544"
      unitRef="usd">7801</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2021"
      decimals="0"
      id="ixv-19545"
      unitRef="usd">10908</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2022"
      decimals="0"
      id="ixv-19546"
      unitRef="usd">13800</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2023"
      decimals="0"
      id="ixv-19547"
      unitRef="usd">12657</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2024"
      decimals="0"
      id="ixv-19548"
      unitRef="usd">12022</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_ClassMember_AsOf_2025"
      decimals="0"
      id="ixv-19549"
      unitRef="usd">13133</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000130874_LG_1_AdditionalIndexMember_11YR"
      id="ixv-292">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Bloomberg Commodity Total Return Index&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2015"
      decimals="0"
      id="ixv-19550"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2016"
      decimals="0"
      id="ixv-19551"
      unitRef="usd">9202</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2017"
      decimals="0"
      id="ixv-19552"
      unitRef="usd">9273</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19553"
      unitRef="usd">9526</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19554"
      unitRef="usd">9015</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19555"
      unitRef="usd">7927</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19556"
      unitRef="usd">11120</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19557"
      unitRef="usd">14147</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19558"
      unitRef="usd">13032</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19559"
      unitRef="usd">12358</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_1_AdditionalIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19560"
      unitRef="usd">13558</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000130874_LG_2_AdditionalIndexMember_11YR"
      id="ixv-341">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;MSCI ACWI (All Country World Index) Index&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2015"
      decimals="0"
      id="ixv-19561"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2016"
      decimals="0"
      id="ixv-19562"
      unitRef="usd">9997</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2017"
      decimals="0"
      id="ixv-19563"
      unitRef="usd">11750</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19564"
      unitRef="usd">13088</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19565"
      unitRef="usd">13529</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19566"
      unitRef="usd">14560</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19567"
      unitRef="usd">19452</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19568"
      unitRef="usd">17470</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19569"
      unitRef="usd">19798</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19570"
      unitRef="usd">23247</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000130874_2_AdditionalIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19571"
      unitRef="usd">27024</oef:AccmVal>
    <oef:AvgAnnlRtrTableTextBlock contextRef="C000130874_ClassMember" id="ixv-442">AVERAGE ANNUAL TOTAL RETURNS:

&#160;

1 Year

5 Year

10 Year


Fidelity&#xae; Series Commodity Strategy Fund

9.24%

10.98%

2.76%


Bloomberg Commodity Total Return Index

9.71%


11.33%


3.09%


MSCI ACWI (All Country World Index) Index

16.25%


13.17%


10.45%




&#160;
&#160;
The fund has begun comparing its performance to the MSCI ACWI (All Country World Index) Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.
&#160;
Visit www.fidelity.com for more recent performance information.&#160;

&#160;


The Fund's past performance is not a good predictor of the Fund's future performance. &#160;The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.





</oef:AvgAnnlRtrTableTextBlock>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_NoLoadClassMember_1YR"
      decimals="INF"
      id="ixv-19572"
      unitRef="pure">0.0924</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_NoLoadClassMember_5YR"
      decimals="INF"
      id="ixv-19573"
      unitRef="pure">0.1098</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_NoLoadClassMember_10YR"
      decimals="INF"
      id="ixv-19574"
      unitRef="pure">0.0276</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_0_BBIndexMember_1YR"
      decimals="INF"
      id="ixv-19575"
      unitRef="pure">0.0971</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_0_BBIndexMember_5YR"
      decimals="INF"
      id="ixv-19576"
      unitRef="pure">0.1133</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_0_BBIndexMember_10YR"
      decimals="INF"
      id="ixv-19577"
      unitRef="pure">0.0309</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_1_BBIndexMember_1YR"
      decimals="INF"
      id="ixv-19578"
      unitRef="pure">0.1625</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_1_BBIndexMember_5YR"
      decimals="INF"
      id="ixv-19579"
      unitRef="pure">0.1317</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000130874_1_BBIndexMember_10YR"
      decimals="INF"
      id="ixv-19580"
      unitRef="pure">0.1045</oef:AvgAnnlRtrPct>
    <oef:UpdPerfInfoLocationTextBlock contextRef="C000130874_ClassMember" id="ixv-517">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Visit &lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;www.fidelity.com&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt; for more recent performance information.&lt;/span&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture contextRef="C000130874_ClassMember" id="ixv-529">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;"&gt;The Fund's past performance is not a good predictor of the Fund's future performance.&lt;/span&gt;</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock contextRef="C000130874_ClassMember" id="ixv-533">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.&lt;/span&gt;</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock contextRef="C000130874_ClassMember" id="ixv-539">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;Key Fund Statistics&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(as of July 31, 2025)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:63%; " valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;KEY FACTS&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt; &lt;span&gt;&#160;&lt;/span&gt;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fund Size&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;540,682,648&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Number of Holdings&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;40&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Total Advisory Fee&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;0&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="middle"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Portfolio Turnover&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;0&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="C000130874_InstantMember"
      decimals="0"
      id="ixv-19581"
      unitRef="usd">540682648</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="C000130874_InstantMember"
      decimals="INF"
      id="ixv-19582"
      unitRef="holding">40</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="C000130874_ClassMember"
      decimals="0"
      id="ixv-19583"
      unitRef="usd">0</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="C000130874_ClassMember"
      decimals="INF"
      id="ixv-19584"
      unitRef="pure">0</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock contextRef="C000130874_ClassMember" id="ixv-614">
Agriculture

28.8


Energy

28.2


Precious Metals

22.5


Industrial Metals

14.7


Livestock

5.8




COMMODITY SECTOR DIVERSIFICATION (% of Fund's net assets)





&#160;

Agriculture - 28.8&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Energy - 28.2&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Precious Metals - 22.5&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Industrial Metals - 14.7&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Livestock - 5.8&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;





DERIVATIVE EXPOSURE
(% of Fund's net assets)

&#160;

&#160;


Futures Contracts

9.5

&#160;


Swaps

92.5

&#160;


&#160;




&#160;
&#160;
&#160;
Swaps

45.8


Futures Contracts

4.7


Short-Term Investments and Net Other Assets (Liabilities)

49.5




ASSET ALLOCATION (% of Fund's Total Exposure)


&#160;



&#160;

Swaps - 45.8&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Futures Contracts - 4.7&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Short-Term Investments and Net Other Assets (Liabilities) - 49.5


&#160;






</oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="C000130874_MS_AgriculturalSectorMember"
      decimals="INF"
      id="ixv-19585"
      unitRef="pure">0.288</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000130874_MS_EnergySectorMember"
      decimals="INF"
      id="ixv-19586"
      unitRef="pure">0.282</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000130874_MS_PreciousMetalsSectorMember"
      decimals="INF"
      id="ixv-19587"
      unitRef="pure">0.225</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000130874_MS_IndustrialMetalsSectorMember"
      decimals="INF"
      id="ixv-19588"
      unitRef="pure">0.147</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000130874_MS_LivestockSectorMember"
      decimals="INF"
      id="ixv-19589"
      unitRef="pure">0.058</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000130874_DE_FuturesContracts_Member"
      decimals="INF"
      id="ixv-19590"
      unitRef="pure">0.095</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000130874_DE_Swaps_Member"
      decimals="INF"
      id="ixv-19591"
      unitRef="pure">0.925</oef:PctOfNav>
    <oef:PctOfNetLongExposure
      contextRef="C000130874_AA_Swaps_Member"
      decimals="INF"
      id="ixv-19592"
      unitRef="pure">0.458</oef:PctOfNetLongExposure>
    <oef:PctOfNetLongExposure
      contextRef="C000130874_AA_FuturesContracts_Member"
      decimals="INF"
      id="ixv-19593"
      unitRef="pure">0.047</oef:PctOfNetLongExposure>
    <oef:PctOfNetLongExposure
      contextRef="C000130874_AA_ShortTermInvestmentsandNetOtherAssetsLiabilities_Member"
      decimals="INF"
      id="ixv-19594"
      unitRef="pure">0.495</oef:PctOfNetLongExposure>
    <dei:DocumentPeriodEndDate contextRef="Trust" id="ixv-856">2025-07-31</dei:DocumentPeriodEndDate>
    <oef:FundName contextRef="C000206762_ClassMember" id="ixv-868">Fidelity&#xae; SAI Inflation-Focused Fund</oef:FundName>
    <oef:ClassName contextRef="C000206762_ClassMember" id="ixv-871">Fidelity&#xae; SAI Inflation-Focused Fund</oef:ClassName>
    <dei:TradingSymbol contextRef="C000206762_ClassMember" id="ixv-875">FIFGX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock contextRef="C000206762_ClassMember" id="ixv-894">This annual shareholder report contains information about Fidelity&#xae; SAI Inflation-Focused Fund for the period August 1, 2024 to July 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual contextRef="C000206762_ClassMember" id="ixv-896">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock contextRef="C000206762_ClassMember" id="ixv-901">You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-3455 or by sending an e-mail to fidfunddocuments@fidelity.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite contextRef="C000206762_ClassMember" id="ixv-903">fundresearch.fidelity.com/prospectus/sec</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber contextRef="C000206762_ClassMember" id="ixv-906">1-800-544-3455</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail contextRef="C000206762_ClassMember" id="ixv-909">fidfunddocuments@fidelity.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock contextRef="C000206762_ClassMember" id="ixv-916">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;What were your Fund costs for the last year?&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(based on hypothetical $10,000 investment)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;FUND COST (PREVIOUS YEAR)&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:45%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs of a $10,000 investment&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs paid as a percentage of a $10,000 investment &lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:45%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; SAI Inflation-Focused Fund&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$ &lt;/span&gt;40&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;0.39&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="C000206762_ClassMember"
      decimals="0"
      id="ixv-19595"
      unitRef="usd">40</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="C000206762_ClassMember"
      decimals="INF"
      id="ixv-19596"
      unitRef="pure">0.0039</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock contextRef="C000206762_ClassMember" id="ixv-958">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;What affected the Fund's performance this period?&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;For the 12 months ending July 31, 2025, most commodities gained value. Against a backdrop of tariff and geopolitical uncertainty and a weakening U.S. dollar, investors encountered a significant gap between the best- and worst-performing commodity types for the fiscal year. Meanwhile, Treasury Inflation Protected Securities outpaced money market securities. The following returns are stated on a total return basis.&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;For the full 12 months, the fund benefited from positive results from precious metals (+32%), including gains of roughly 34% and 25%, respectively, for gold and silver. Industrial metals also had a positive result, gaining roughly 3%. Within the sector, aluminum (+14%), zinc (+5%) and copper (+3%) enjoyed the strongest performance, while nickel (-11%) and lead (-8%) lost value.&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Livestock, meanwhile, gained 25%, as tight cattle supply and healthy demand led to strength in the price of live cattle (+30%). Lean hogs also advanced (+18%).&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Energy rose about 3%, boosted by an increase in natural gas (+5%). Meanwhile, West Texas intermediate crude oil (+4%) and Brent crude oil (+1%) more modestly gained.&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Meanwhile, agriculture gained 4% overall, led by coffee (+43%). Grains posted negative results, including soybeans (-2%), corn (-1%), soybean meal (-18%), wheat (-10%) and Kansas City wheat (-11%).&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock contextRef="C000206762_ClassMember" id="ixv-979">How did the Fund perform over the life of Fund?

 &#160;&#160;
CUMULATIVE PERFORMANCE
December 20, 2018 through July 31, 2025.
Initial investment of $10,000.
Fidelity&#xae; SAI Inflation-Focused Fund


$10,000

$10,350


$9,518


$13,953


$17,787


$15,330


$14,713


$15,736



Fidelity Commodity Linked Index&#x2120;


$10,000

$10,166


$8,938


$12,538


$15,952


$14,695


$13,960


$15,087



Bloomberg Commodity 50/50 Petroleum and ex-Petroleum Index


$10,000

$10,350


$9,518


$13,953


$17,787


$15,671


$15,549


$16,803



MSCI ACWI (All Country World Index) Index


$10,000

$11,820


$12,721


$16,996


$15,263


$17,298


$20,311


$23,610



&#160;

2018

2019

2020

2021

2022

2023

2024

2025









&#160;
The fund has begun comparing its performance to the MSCI ACWI (All Country World Index) Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.</oef:LineGraphTableTextBlock>
    <oef:LineGraphAndTableMeasureName contextRef="C000206762_LG_ClassMember_8YR" id="ixv-998">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; SAI Inflation-Focused Fund&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2018"
      decimals="0"
      id="ixv-19597"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2019"
      decimals="0"
      id="ixv-19598"
      unitRef="usd">10350</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2020"
      decimals="0"
      id="ixv-19599"
      unitRef="usd">9518</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2021"
      decimals="0"
      id="ixv-19600"
      unitRef="usd">13953</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2022"
      decimals="0"
      id="ixv-19601"
      unitRef="usd">17787</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2023"
      decimals="0"
      id="ixv-19602"
      unitRef="usd">15330</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2024"
      decimals="0"
      id="ixv-19603"
      unitRef="usd">14713</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_ClassMember_AsOf_2025"
      decimals="0"
      id="ixv-19604"
      unitRef="usd">15736</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000206762_LG_1_AdditionalIndexMember_8YR"
      id="ixv-1035">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity Commodity Linked Index&#x2120;&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19605"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19606"
      unitRef="usd">10166</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19607"
      unitRef="usd">8938</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19608"
      unitRef="usd">12538</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19609"
      unitRef="usd">15952</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19610"
      unitRef="usd">14695</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19611"
      unitRef="usd">13960</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_1_AdditionalIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19612"
      unitRef="usd">15087</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000206762_LG_2_AdditionalIndexMember_8YR"
      id="ixv-1072">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Bloomberg Commodity 50/50 Petroleum and ex-Petroleum Index &lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19613"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19614"
      unitRef="usd">10350</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19615"
      unitRef="usd">9518</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19616"
      unitRef="usd">13953</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19617"
      unitRef="usd">17787</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19618"
      unitRef="usd">15671</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19619"
      unitRef="usd">15549</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_2_AdditionalIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19620"
      unitRef="usd">16803</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000206762_0_LG_BBIndexMember_8YR"
      id="ixv-1109">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;MSCI ACWI (All Country World Index) Index&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19621"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19622"
      unitRef="usd">11820</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19623"
      unitRef="usd">12721</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19624"
      unitRef="usd">16996</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19625"
      unitRef="usd">15263</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19626"
      unitRef="usd">17298</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19627"
      unitRef="usd">20311</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000206762_0_BBIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19628"
      unitRef="usd">23610</oef:AccmVal>
    <oef:AvgAnnlRtrTableTextBlock contextRef="C000206762_ClassMember" id="ixv-1188">AVERAGE ANNUAL TOTAL RETURNS:

&#160;

1 Year

5 Year

Life of Fund&#160;A


Fidelity&#xae; SAI Inflation-Focused Fund

6.95%

10.58%

7.09%


Fidelity Commodity Linked Index&#x2120;

8.07%


11.04%


6.41%


Bloomberg Commodity 50/50 Petroleum and ex-Petroleum Index B

8.07%


n/a

n/a


MSCI ACWI (All Country World Index) Index

16.25%


13.17%


13.87%




A&#160; &#160; From December 20, 2018
B  &#160; From July 18, 2023
&#160;
The fund has begun comparing its performance to the MSCI ACWI (All Country World Index) Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.
&#160;
Visit www.fidelity.com for more recent performance information.&#160;

&#160;


The Fund's past performance is not a good predictor of the Fund's future performance. &#160;The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.





</oef:AvgAnnlRtrTableTextBlock>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_NoLoadClassMember_1YR"
      decimals="INF"
      id="ixv-19629"
      unitRef="pure">0.0695</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_NoLoadClassMember_5YR"
      decimals="INF"
      id="ixv-19630"
      unitRef="pure">0.1058</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_NoLoadClassMember_2024-08-01_2025-07-31"
      decimals="INF"
      id="ixv-19631"
      unitRef="pure">0.0709</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_0_AdditionalIndexMember_1YR"
      decimals="INF"
      id="ixv-19632"
      unitRef="pure">0.0807</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_0_AdditionalIndexMember_5YR"
      decimals="INF"
      id="ixv-19633"
      unitRef="pure">0.1104</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_0_AdditionalIndexMember_LOC"
      decimals="INF"
      id="ixv-19634"
      unitRef="pure">0.0641</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_1_AdditionalIndexMember_1YR"
      decimals="INF"
      id="ixv-19635"
      unitRef="pure">0.0807</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_1_AdditionalIndexMember_LOC"
      id="ixv-19636"
      unitRef="pure"
      xsi:nil="true"/>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_1_AdditionalIndexMember_LOC"
      id="ixv-19637"
      unitRef="pure"
      xsi:nil="true"/>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_2_BBIndexMember_1YR"
      decimals="INF"
      id="ixv-19638"
      unitRef="pure">0.1625</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_2_BBIndexMember_5YR"
      decimals="INF"
      id="ixv-19639"
      unitRef="pure">0.1317</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000206762_2_BBIndexMember_LOC"
      decimals="INF"
      id="ixv-19640"
      unitRef="pure">0.1387</oef:AvgAnnlRtrPct>
    <oef:PerfInceptionDate
      contextRef="C000206762_Perf_2018-12-20_ClassMember"
      id="ixv-1274">2018-12-20</oef:PerfInceptionDate>
    <oef:PerfInceptionDate
      contextRef="C000206762_Perf_2023-07-18_ClassMember"
      id="ixv-1281">2023-07-18</oef:PerfInceptionDate>
    <oef:UpdPerfInfoLocationTextBlock contextRef="C000206762_ClassMember" id="ixv-1295">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Visit &lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;www.fidelity.com&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt; for more recent performance information.&lt;/span&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture contextRef="C000206762_ClassMember" id="ixv-1307">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;"&gt;The Fund's past performance is not a good predictor of the Fund's future performance.&lt;/span&gt;</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock contextRef="C000206762_ClassMember" id="ixv-1311">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.&lt;/span&gt;</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock contextRef="C000206762_ClassMember" id="ixv-1317">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;Key Fund Statistics&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(as of July 31, 2025)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:63%; " valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;KEY FACTS&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt; &lt;span&gt;&#160;&lt;/span&gt;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fund Size&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;5,730,917,826&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Number of Holdings&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;58&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Total Advisory Fee&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;17,425,679&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="middle"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Portfolio Turnover&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;0&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="C000206762_InstantMember"
      decimals="0"
      id="ixv-19641"
      unitRef="usd">5730917826</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="C000206762_InstantMember"
      decimals="INF"
      id="ixv-19642"
      unitRef="holding">58</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="C000206762_ClassMember"
      decimals="0"
      id="ixv-19643"
      unitRef="usd">17425679</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="C000206762_ClassMember"
      decimals="INF"
      id="ixv-19644"
      unitRef="pure">0</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock contextRef="C000206762_ClassMember" id="ixv-1392">
Energy

49.8


Industrial Metals

21.1


Agriculture

13.0


Precious Metals

11.5


Livestock

4.6




COMMODITY SECTOR DIVERSIFICATION (% of Fund's net assets)





&#160;

Energy - 49.8&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Industrial Metals - 21.1&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Agriculture - 13.0&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Precious Metals - 11.5&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Livestock - 4.6&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;





DERIVATIVE EXPOSURE
(% of Fund's net assets)

&#160;

&#160;


Futures Contracts

115.6

&#160;


&#160;




&#160;
&#160;
&#160;
Futures Contracts

53.6


Short-Term Investments and Net Other Assets (Liabilities)

46.4




ASSET ALLOCATION (% of Fund's Total Exposure)


&#160;



&#160;

Futures Contracts - 53.6&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Short-Term Investments and Net Other Assets (Liabilities) - 46.4


&#160;






</oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="C000206762_MS_EnergySectorMember"
      decimals="INF"
      id="ixv-19645"
      unitRef="pure">0.498</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000206762_MS_IndustrialMetalsSectorMember"
      decimals="INF"
      id="ixv-19646"
      unitRef="pure">0.211</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000206762_MS_AgriculturalSectorMember"
      decimals="INF"
      id="ixv-19647"
      unitRef="pure">0.130</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000206762_MS_PreciousMetalsSectorMember"
      decimals="INF"
      id="ixv-19648"
      unitRef="pure">0.115</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000206762_MS_LivestockSectorMember"
      decimals="INF"
      id="ixv-19649"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000206762_DE_FuturesContracts_Member"
      decimals="INF"
      id="ixv-19650"
      unitRef="pure">1.156</oef:PctOfNav>
    <oef:PctOfNetLongExposure
      contextRef="C000206762_AA_FuturesContracts_Member"
      decimals="INF"
      id="ixv-19651"
      unitRef="pure">0.536</oef:PctOfNetLongExposure>
    <oef:PctOfNetLongExposure
      contextRef="C000206762_AA_ShortTermInvestmentsandNetOtherAssetsLiabilities_Member"
      decimals="INF"
      id="ixv-19652"
      unitRef="pure">0.464</oef:PctOfNetLongExposure>
    <dei:DocumentPeriodEndDate contextRef="Trust" id="ixv-1612">2025-07-31</dei:DocumentPeriodEndDate>
    <oef:FundName contextRef="C000175832_ClassMember" id="ixv-1624">Fidelity&#xae; Commodity Strategy Fund</oef:FundName>
    <oef:ClassName contextRef="C000175832_ClassMember" id="ixv-1627">Fidelity&#xae; Commodity Strategy Fund</oef:ClassName>
    <dei:TradingSymbol contextRef="C000175832_ClassMember" id="ixv-1631">FYHTX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock contextRef="C000175832_ClassMember" id="ixv-1650">This annual shareholder report contains information about Fidelity&#xae; Commodity Strategy Fund for the period August 1, 2024 to July 31, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual contextRef="C000175832_ClassMember" id="ixv-1652">annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock contextRef="C000175832_ClassMember" id="ixv-1657">You can find additional information about the Fund at fundresearch.fidelity.com/prospectus/sec. You can also request this information by contacting us at 1-800-544-8544 or by sending an e-mail to fidfunddocuments@fidelity.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite contextRef="C000175832_ClassMember" id="ixv-1659">fundresearch.fidelity.com/prospectus/sec</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber contextRef="C000175832_ClassMember" id="ixv-1662">1-800-544-8544</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail contextRef="C000175832_ClassMember" id="ixv-1665">fidfunddocuments@fidelity.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock contextRef="C000175832_ClassMember" id="ixv-1672">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;What were your Fund costs for the last year?&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(based on hypothetical $10,000 investment)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;FUND COST (PREVIOUS YEAR)&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="0" style="border-collapse:collapse;border-style:none;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:45%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs of a $10,000 investment&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; background-color:#dfe0e4;border:1px solid #dfe0e4;padding:0px 0px 0px 0px;" valign="bottom"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;Costs paid as a percentage of a $10,000 investment &lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:45%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; Commodity Strategy Fund&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:24%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$ &lt;/span&gt;66&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:30%; border-bottom:1px solid #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:center;text-align-last:auto;"&gt;0.63&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:1%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="C000175832_ClassMember"
      decimals="0"
      id="ixv-19653"
      unitRef="usd">66</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="C000175832_ClassMember"
      decimals="INF"
      id="ixv-19654"
      unitRef="pure">0.0063</oef:ExpenseRatioPct>
    <oef:FactorsAffectingPerfTextBlock contextRef="C000175832_ClassMember" id="ixv-1714">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;What affected the Fund's performance this period?&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;For the 12 months ending July 31, 2025, most commodities gained value. Against a backdrop of tariff and geopolitical uncertainty and a weakening U.S. dollar, investors encountered a significant gap between the best- and worst-performing commodity types for the fiscal year. The following returns are stated on a total return basis.&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;For the full 12 months, the fund benefited from positive results from precious metals (+32%), including gains of roughly 34% and 25%, respectively, for gold and silver. Industrial metals also had a positive result, gaining roughly 3%. Within the sector, aluminum (+14%), zinc (+5%) and copper (+3%) enjoyed the strongest performance, while nickel (-11%) and lead (-8%) lost value.&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Livestock, meanwhile, gained 25%, as tight cattle supply and healthy demand led to strength in the price of live cattle (+30%). Lean hogs also advanced (+18%).&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Energy rose about 3%, boosted by an increase in natural gas (+5%). Meanwhile, West Texas intermediate crude oil (+4%) and Brent crude oil (+1%) more modestly gained.&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;text-indent:-24px;margin-bottom:2px;margin-left:24px;margin-top:5px;margin-right:0px;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:normal;"&gt;&#x2022;&lt;span style="padding-right:10px"&gt;&lt;/span&gt;Meanwhile, agriculture gained 4% overall, led by coffee (+43%). Grains posted negative results, including soybeans (-2%), corn (-1%), soybean meal (-18%), wheat (-10%) and Kansas City wheat (-11%).&#160;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:FactorsAffectingPerfTextBlock>
    <oef:LineGraphTableTextBlock contextRef="C000175832_ClassMember" id="ixv-1735">How did the Fund perform over the life of Fund?

 &#160;&#160;
CUMULATIVE PERFORMANCE
May 30, 2017 through July 31, 2025.
Initial investment of $10,000.
Fidelity&#xae; Commodity Strategy Fund


$10,000

$10,150


$10,329


$9,675


$8,505


$11,820


$14,785


$13,505


$12,769



Bloomberg Commodity Total Return Index


$10,000

$10,161


$10,438


$9,879


$8,686


$12,185


$15,502


$14,280


$13,541



MSCI ACWI (All Country World Index) Index


$10,000

$10,334


$11,511


$11,899


$12,806


$17,109


$15,365


$17,413


$20,446



&#160;

2017

2018

2019

2020

2021

2022

2023

2024

2025









&#160;
The fund has begun comparing its performance to the MSCI ACWI (All Country World Index) Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.</oef:LineGraphTableTextBlock>
    <oef:LineGraphAndTableMeasureName contextRef="C000175832_LG_ClassMember_9YR" id="ixv-1754">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fidelity&#xae; Commodity Strategy Fund&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2017"
      decimals="0"
      id="ixv-19655"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2018"
      decimals="0"
      id="ixv-19656"
      unitRef="usd">10150</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2019"
      decimals="0"
      id="ixv-19657"
      unitRef="usd">10329</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2020"
      decimals="0"
      id="ixv-19658"
      unitRef="usd">9675</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2021"
      decimals="0"
      id="ixv-19659"
      unitRef="usd">8505</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2022"
      decimals="0"
      id="ixv-19660"
      unitRef="usd">11820</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2023"
      decimals="0"
      id="ixv-19661"
      unitRef="usd">14785</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2024"
      decimals="0"
      id="ixv-19662"
      unitRef="usd">13505</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_ClassMember_AsOf_2025"
      decimals="0"
      id="ixv-19663"
      unitRef="usd">12769</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000175832_LG_1_AdditionalIndexMember_9YR"
      id="ixv-1795">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;Bloomberg Commodity Total Return Index&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2017"
      decimals="0"
      id="ixv-19664"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19665"
      unitRef="usd">10161</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19666"
      unitRef="usd">10438</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19667"
      unitRef="usd">9879</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19668"
      unitRef="usd">8686</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19669"
      unitRef="usd">12185</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19670"
      unitRef="usd">15502</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19671"
      unitRef="usd">14280</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_1_AdditionalIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19672"
      unitRef="usd">13541</oef:AccmVal>
    <oef:LineGraphAndTableMeasureName
      contextRef="C000175832_LG_2_AdditionalIndexMember_9YR"
      id="ixv-1836">&lt;span style="font-family:'Fidelity Sans';font-size:9px;color:#000000;font-style:normal;font-weight:normal;"&gt;MSCI ACWI (All Country World Index) Index&lt;/span&gt;</oef:LineGraphAndTableMeasureName>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2017"
      decimals="0"
      id="ixv-19673"
      unitRef="usd">10000</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2018"
      decimals="0"
      id="ixv-19674"
      unitRef="usd">10334</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2019"
      decimals="0"
      id="ixv-19675"
      unitRef="usd">11511</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2020"
      decimals="0"
      id="ixv-19676"
      unitRef="usd">11899</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2021"
      decimals="0"
      id="ixv-19677"
      unitRef="usd">12806</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2022"
      decimals="0"
      id="ixv-19678"
      unitRef="usd">17109</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2023"
      decimals="0"
      id="ixv-19679"
      unitRef="usd">15365</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2024"
      decimals="0"
      id="ixv-19680"
      unitRef="usd">17413</oef:AccmVal>
    <oef:AccmVal
      contextRef="C000175832_2_AdditionalIndexMember_AsOf_2025"
      decimals="0"
      id="ixv-19681"
      unitRef="usd">20446</oef:AccmVal>
    <oef:AvgAnnlRtrTableTextBlock contextRef="C000175832_ClassMember" id="ixv-1923">AVERAGE ANNUAL TOTAL RETURNS:

&#160;

1 Year

5 Year

Life of Fund&#160;A


Fidelity&#xae; Commodity Strategy Fund

8.57%

10.27%

4.08%


Bloomberg Commodity Total Return Index

9.71%


11.33%


4.96%


MSCI ACWI (All Country World Index) Index

16.25%


13.17%


11.17%




A&#160; &#160;From May 30, 2017

&#160;
The fund has begun comparing its performance to the MSCI ACWI (All Country World Index) Index to satisfy a new Securities and Exchange Commission (SEC) disclosure requirement.
&#160;
Visit www.fidelity.com for more recent performance information.&#160;

&#160;


The Fund's past performance is not a good predictor of the Fund's future performance. &#160;The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.





</oef:AvgAnnlRtrTableTextBlock>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_NoLoadClassMember_1YR"
      decimals="INF"
      id="ixv-19682"
      unitRef="pure">0.0857</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_NoLoadClassMember_5YR"
      decimals="INF"
      id="ixv-19683"
      unitRef="pure">0.1027</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_NoLoadClassMember_2024-08-01_2025-07-31"
      decimals="INF"
      id="ixv-19684"
      unitRef="pure">0.0408</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_0_AdditionalIndexMember_1YR"
      decimals="INF"
      id="ixv-19685"
      unitRef="pure">0.0971</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_0_AdditionalIndexMember_5YR"
      decimals="INF"
      id="ixv-19686"
      unitRef="pure">0.1133</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_0_AdditionalIndexMember_LOC"
      decimals="INF"
      id="ixv-19687"
      unitRef="pure">0.0496</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_1_BBIndexMember_1YR"
      decimals="INF"
      id="ixv-19688"
      unitRef="pure">0.1625</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_1_BBIndexMember_5YR"
      decimals="INF"
      id="ixv-19689"
      unitRef="pure">0.1317</oef:AvgAnnlRtrPct>
    <oef:AvgAnnlRtrPct
      contextRef="C000175832_1_BBIndexMember_LOC"
      decimals="INF"
      id="ixv-19690"
      unitRef="pure">0.1117</oef:AvgAnnlRtrPct>
    <oef:PerfInceptionDate
      contextRef="C000175832_Perf_2017-05-30_Member"
      id="ixv-1992">2017-05-30</oef:PerfInceptionDate>
    <oef:UpdPerfInfoLocationTextBlock contextRef="C000175832_ClassMember" id="ixv-2007">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Visit &lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt;www.fidelity.com&lt;/span&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt; for more recent performance information.&lt;/span&gt;</oef:UpdPerfInfoLocationTextBlock>
    <oef:PerformancePastDoesNotIndicateFuture contextRef="C000175832_ClassMember" id="ixv-2019">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:italic;font-weight:normal;"&gt;The Fund's past performance is not a good predictor of the Fund's future performance.&lt;/span&gt;</oef:PerformancePastDoesNotIndicateFuture>
    <oef:NoDeductionOfTaxesTextBlock contextRef="C000175832_ClassMember" id="ixv-2023">&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;The graph and table do not reflect the deduction of taxes that a shareholder would pay on fund distributions or redemption of fund shares.&lt;/span&gt;</oef:NoDeductionOfTaxesTextBlock>
    <oef:AddlFundStatisticsTextBlock contextRef="C000175832_ClassMember" id="ixv-2029">&lt;span style="font-family:'Fidelity Sans';font-size:16px;color:#368627;font-style:normal;font-weight:bold;"&gt;Key Fund Statistics&lt;/span&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;(as of July 31, 2025)&lt;/span&gt;&lt;/div&gt;
&lt;div&gt;&lt;span style="font-size:11px;"&gt;&#160;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;table cellpadding="0" cellspacing="1" style="border-collapse:separate;border-style:none;margin:auto;" width="100%"&gt;&lt;tr&gt;&lt;td style="width:63%; " valign="top"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:12px;color:#000000;font-style:normal;font-weight:bold;"&gt;KEY FACTS&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:bold;"&gt; &lt;span&gt;&#160;&lt;/span&gt;&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:12px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Fund Size&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;106,575,300&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Number of Holdings&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;28&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Total Advisory Fee&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;$&lt;/span&gt;239,843&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="middle"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;tr&gt;&lt;td style="width:63%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;Portfolio Turnover&lt;/span&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:32%; border-bottom:1px dashed #000000;padding:0px 0px 0px 0px;" valign="middle"&gt;&lt;div style="text-align:right;text-align-last:auto;"&gt;0&lt;span style="font-family:'Fidelity Sans';font-size:11px;color:#000000;font-style:normal;font-weight:normal;"&gt;%&lt;/span&gt;&lt;/div&gt;
&lt;div style="text-align:right;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;td style="width:5%; " valign="top"&gt;&lt;span style="line-height:11px;"&gt;&#160;&lt;/span&gt;&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;
&lt;/td&gt;
&lt;/tr&gt;
&lt;/table&gt;
&lt;/div&gt;
&lt;div style="text-align:left;text-align-last:auto;"&gt;&lt;/div&gt;</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="C000175832_InstantMember"
      decimals="0"
      id="ixv-19691"
      unitRef="usd">106575300</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="C000175832_InstantMember"
      decimals="INF"
      id="ixv-19692"
      unitRef="holding">28</oef:HoldingsCount>
    <oef:AdvisoryFeesPaidAmt
      contextRef="C000175832_ClassMember"
      decimals="0"
      id="ixv-19693"
      unitRef="usd">239843</oef:AdvisoryFeesPaidAmt>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="C000175832_ClassMember"
      decimals="INF"
      id="ixv-19694"
      unitRef="pure">0</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock contextRef="C000175832_ClassMember" id="ixv-2104">
Agriculture

28.7


Energy

28.3


Precious Metals

22.5


Industrial Metals

14.7


Livestock

5.8




COMMODITY SECTOR DIVERSIFICATION (% of Fund's net assets)





&#160;

Agriculture - 28.7&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Energy - 28.3&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Precious Metals - 22.5&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Industrial Metals - 14.7&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;

Livestock - 5.8&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


&#160;





DERIVATIVE EXPOSURE
(% of Fund's net assets)

&#160;

&#160;


Futures Contracts

100.1

&#160;


&#160;




&#160;
&#160;
&#160;
Futures Contracts

50.0


Short-Term Investments and Net Other Assets (Liabilities)

50.0




ASSET ALLOCATION (% of Fund's Total Exposure)


&#160;



&#160;

Futures Contracts - 50.0&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;&#160;


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Short-Term Investments and Net Other Assets (Liabilities) - 50.0


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</oef:HoldingsTableTextBlock>
    <oef:PctOfNav
      contextRef="C000175832_MS_AgriculturalSectorMember"
      decimals="INF"
      id="ixv-19695"
      unitRef="pure">0.287</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000175832_MS_EnergySectorMember"
      decimals="INF"
      id="ixv-19696"
      unitRef="pure">0.283</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000175832_MS_PreciousMetalsSectorMember"
      decimals="INF"
      id="ixv-19697"
      unitRef="pure">0.225</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000175832_MS_IndustrialMetalsSectorMember"
      decimals="INF"
      id="ixv-19698"
      unitRef="pure">0.147</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000175832_MS_LivestockSectorMember"
      decimals="INF"
      id="ixv-19699"
      unitRef="pure">0.058</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="C000175832_DE_FuturesContracts_Member"
      decimals="INF"
      id="ixv-19700"
      unitRef="pure">1.001</oef:PctOfNav>
    <oef:PctOfNetLongExposure
      contextRef="C000175832_AA_FuturesContracts_Member"
      decimals="INF"
      id="ixv-19701"
      unitRef="pure">0.500</oef:PctOfNetLongExposure>
    <oef:PctOfNetLongExposure
      contextRef="C000175832_AA_ShortTermInvestmentsandNetOtherAssetsLiabilities_Member"
      decimals="INF"
      id="ixv-19702"
      unitRef="pure">0.500</oef:PctOfNetLongExposure>
</xbrl>
