<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xml:lang="en-US"
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:gmt="http://www.gatx.com/20260626"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:srt="http://fasb.org/srt/2026"
  xmlns:us-gaap="http://fasb.org/us-gaap/2026"
  xmlns:us-gaap-ebp="http://fasb.org/us-gaap-ebp/2026"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="gmt-20260626.xsd" xlink:type="simple"/>
    <context id="c-1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-5">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-01-01</startDate>
            <endDate>2024-12-31</endDate>
        </period>
    </context>
    <context id="c-6">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2023-12-31</instant>
        </period>
    </context>
    <context id="c-7">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MinimumMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-8">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="srt:RangeAxis">srt:MaximumMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-9">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="gmt:EBPEmployerContributionAxis">gmt:EBPEmployerContributionTrancheOneMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-10">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="gmt:EBPEmployerContributionAxis">gmt:EBPEmployerContributionTrancheTwoMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-11">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP004Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-12">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP004Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-01-01</startDate>
            <endDate>2024-12-31</endDate>
        </period>
    </context>
    <context id="c-13">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:MutualFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-14">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:MutualFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-15">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-16">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-17">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-18">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-19">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-20">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-21">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:MutualFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-22">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:MutualFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-23">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-24">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-25">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-26">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-27">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-28">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedPlanInterestInMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-29">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-01-01</startDate>
            <endDate>2025-12-31</endDate>
        </period>
    </context>
    <context id="c-30">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustAndPlanInterestInMasterTrustAxis">us-gaap-ebp:EmployeeBenefitPlanNonconsolidatedMasterTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2024-01-01</startDate>
            <endDate>2024-12-31</endDate>
        </period>
    </context>
    <context id="c-31">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:MutualFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-32">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:MutualFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-33">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-34">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap-ebp:EmployeeBenefitPlanEmployerCommonStockFundMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-35">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-36">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:DefinedBenefitPlanCommonCollectiveTrustMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-37">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-38">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel1Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-39">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel2Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-40">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel3Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-12-31</instant>
        </period>
    </context>
    <context id="c-41">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel2Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <context id="c-42">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000040211</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:FairValueByFairValueHierarchyLevelAxis">us-gaap:FairValueInputsLevel3Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="dei:LegalEntityAxis">gmt:EBP002Member</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2024-12-31</instant>
        </period>
    </context>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="number">
        <measure>pure</measure>
    </unit>
    <dei:AmendmentFlag contextRef="c-2" id="f-5">false</dei:AmendmentFlag>
    <dei:AmendmentFlag contextRef="c-1" id="f-6">false</dei:AmendmentFlag>
    <dei:EntityCentralIndexKey contextRef="c-1" id="f-7">0000040211</dei:EntityCentralIndexKey>
    <dei:EntityCentralIndexKey contextRef="c-2" id="f-8">0000040211</dei:EntityCentralIndexKey>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionMatchingPercentage contextRef="c-5" decimals="2" id="f-60" unitRef="number">0.50</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionMatchingPercentage>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionMatchingPercentage contextRef="c-9" decimals="2" id="f-61" unitRef="number">1</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionMatchingPercentage>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionMatchingPercentage contextRef="c-10" decimals="2" id="f-62" unitRef="number">0.50</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionMatchingPercentage>
    <dei:DocumentType contextRef="c-1" id="f-1">11-K</dei:DocumentType>
    <dei:DocumentType contextRef="c-2" id="f-2">11-K</dei:DocumentType>
    <dei:EntityRegistrantName contextRef="c-2" id="f-3">GATX Corporation</dei:EntityRegistrantName>
    <dei:EntityRegistrantName contextRef="c-1" id="f-4">GATX Corporation</dei:EntityRegistrantName>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-3" decimals="0" id="f-9" unitRef="usd">263756200</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-4" decimals="0" id="f-10" unitRef="usd">238226571</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipant contextRef="c-3" decimals="0" id="f-11" unitRef="usd">2073522</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipant>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipant contextRef="c-4" decimals="0" id="f-12" unitRef="usd">1876077</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipant>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionReceivable contextRef="c-3" decimals="0" id="f-13" unitRef="usd">279616</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionReceivable>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionReceivable contextRef="c-4" decimals="0" id="f-14" unitRef="usd">248222</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionReceivable>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-3" decimals="0" id="f-15" unitRef="usd">266109338</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-4" decimals="0" id="f-16" unitRef="usd">240350870</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust contextRef="c-2" decimals="0" id="f-17" unitRef="usd">34848234</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust contextRef="c-5" decimals="0" id="f-18" unitRef="usd">35436204</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForChangeInPlanInterestInMasterTrust>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash contextRef="c-2" decimals="0" id="f-19" unitRef="usd">3530968</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash contextRef="c-5" decimals="0" id="f-20" unitRef="usd">3421816</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForEmployerContributionCash>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover contextRef="c-2" decimals="0" id="f-21" unitRef="usd">8479285</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover contextRef="c-5" decimals="0" id="f-22" unitRef="usd">8255603</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionExcludingRollover>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover contextRef="c-2" decimals="0" id="f-23" unitRef="usd">515168</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover contextRef="c-5" decimals="0" id="f-24" unitRef="usd">1080729</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForParticipantContributionRollover>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution contextRef="c-2" decimals="0" id="f-25" unitRef="usd">12525421</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution contextRef="c-5" decimals="0" id="f-26" unitRef="usd">12758148</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForContribution>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant contextRef="c-2" decimals="0" id="f-27" unitRef="usd">117285</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant contextRef="c-5" decimals="0" id="f-28" unitRef="usd">111347</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestIncomeOnNoteReceivableFromParticipant>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan contextRef="c-2" decimals="0" id="f-29" unitRef="usd">129477</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan contextRef="c-5" decimals="0" id="f-30" unitRef="usd">168289</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease contextRef="c-2" decimals="0" id="f-31" unitRef="usd">47620417</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease contextRef="c-5" decimals="0" id="f-32" unitRef="usd">48473988</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncrease>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant contextRef="c-2" decimals="0" id="f-33" unitRef="usd">21855474</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant contextRef="c-5" decimals="0" id="f-34" unitRef="usd">21721057</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForPaymentToParticipant>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense contextRef="c-2" decimals="0" id="f-35" unitRef="usd">6475</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense contextRef="c-5" decimals="0" id="f-36" unitRef="usd">6288</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecreaseForAdministrativeExpense>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease contextRef="c-2" decimals="0" id="f-37" unitRef="usd">21861949</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease contextRef="c-5" decimals="0" id="f-38" unitRef="usd">21727345</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitDecrease>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease contextRef="c-2" decimals="0" id="f-39" unitRef="usd">25758468</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease contextRef="c-5" decimals="0" id="f-40" unitRef="usd">26746643</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecrease>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-4" decimals="0" id="f-41" unitRef="usd">240350870</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-6" decimals="0" id="f-42" unitRef="usd">213604227</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-3" decimals="0" id="f-43" unitRef="usd">266109338</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-4" decimals="0" id="f-44" unitRef="usd">240350870</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanDescriptionOfPlanTextBlock contextRef="c-2" id="f-45">Description of the Plan&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following description of the GATX Corporation (GATX or the Company) Salaried Employees Retirement Savings Plan (the Plan) provides only general information. Participants should refer to the Plan document for a more complete description of the Plan's provisions.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;General&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Plan is a defined-contribution plan established on July 1, 1965, for salaried employees of GATX and each of its domestic subsidiaries. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974, as amended (ERISA). Fidelity Management Trust Company has been appointed trustee of the Plan and also serves as the record keeper to maintain the individual accounts of each Plan participant.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Effective January 1, 2025, the Plan was amended and restated to comply with certain provisions under the Setting Every Community Up for Retirement Enhancement ("SECURE") Act of 2019, the SECURE Act of 2022 and related regulatory guidance. The amendments included updates to required minimum distribution rules, such as an increase in the applicable age to 73 and the exclusion of designated Roth contributions from required minimum distribution calculations beginning in 2024.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Contributions&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Upon hire, new employees are automatically enrolled in the plan at a 3% contribution rate unless they choose otherwise. Deductions begin after 60 days of employment. Each year, participants may make basic contributions of 1% to 50% of eligible pretax compensation, as defined in the Plan, and participants who have attained the age of 50 before the close of the plan year may make additional catch-up contributions of 1% to 25% of eligible pretax compensation. Participants may also contribute amounts representing distributions from other qualified defined-benefit or defined-contribution plans. Participant contributions are made through payroll deductions and are recorded in the period the deductions are made.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;After a participant completes six months of service, the Company may contribute on behalf of the participant a matching contribution of $1.00 for each $1.00 contributed by the participant up to 3% and $0.50 for each $1.00 contributed by the participant on up to an additional 3% of the participant's eligible compensation contributed to the Plan. For 2025 and 2024 the Company made matching contributions at these levels. At its discretion, the Company may suspend matching contributions or make additional matching contributions for eligible participants.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt; All contributions are made in cash. All contributions are subject to certain limitations of the Internal Revenue Code of 1986, as amended (the Code).&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Participant Accounts&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Each participant's account is credited with the participant's contributions, the Company's contributions, and an allocation of the Plan's earnings or losses. Allocations are based on account balances (as defined). The benefit to which a participant is entitled is that which can be provided from the participant's account. All participant and Company contributions are participant-directed into various investment options and investment allocations may be changed on any business day. &lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Participants are not able to make new investments in the GATX common stock fund.&lt;/span&gt;&lt;span style="color:#1f497d;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt; &lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;A participant may divest any portion of his or her existing account balance in the GATX common stock fund and reinvest such amounts in any other plan investment option. Restrictions may apply to a participant&#x2019;s ability to transfer account balances from the GATX common stock fund pursuant to the Company&#x2019;s insider trading policy. &lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:justify"&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Vesting&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Participants are immediately 100% vested in their account balances.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Participant Distributions and Withdrawals&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;In the event of retirement (as defined), death, permanent disability, or termination of employment, the balance in the participant's account, less any outstanding loan balances, will be distributed as soon as practicable after the participant's end of service. However, if a participant&#x2019;s account balance exceeds $1,000, no distribution shall be made without the written consent of the participant or designated beneficiary.&#160;If the participant or designated beneficiary does not consent, then distribution will be deferred until any subsequent date elected by the participant, provided that benefit payments shall begin no later than age 73. In-service withdrawals are available to participants in the case of financial hardship (as defined). The Plan also allows for age 59 1/2 withdrawals (as defined).  &lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:justify"&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Administrative Expenses&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;It is the intent of the Company to pay the administrative expenses of the Plan, but if the Company fails to make the payments, or so directs, there may be a charge against the Plan for these expenses.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Participant Loans&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;A participant may borrow an amount up to the lesser of $50,000 or 50% of the participant's account balance. Such loans, which are payable over a term specified by the Plan, bear interest at a reasonable rate and are secured by the participant's account balance in the Plan. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Plan Termination&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Although it has not expressed any intent to do so, the Company has the right under the Plan to terminate the Plan subject to the provisions of ERISA. In the event of Plan termination, participants remain 100% vested in their account balances.&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Transfers&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;Approximately $129,000 and $168,000 of transfers to the Plan were made from the GATX Corporation Hourly Employees Retirement Savings Plan (the "Hourly Employees Plan") in 2025 and 2024, respectively, for participants who transferred their account balances to this Plan upon a change in their employment status in the Company whereby they were no longer eligible for the Hourly Employees Plan but became eligible for the Salaried Employees Plan.&lt;/span&gt;&lt;/div&gt;</us-gaap-ebp:EmployeeBenefitPlanDescriptionOfPlanTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate contextRef="c-2" decimals="2" id="f-46" unitRef="number">0.03</us-gaap-ebp:EmployeeBenefitPlanParticipantContributionAutomaticDeferralRate>
    <gmt:EBPParticipantContributionPretaxMinimumAnnualCompensationToTotalCompensationPercentage contextRef="c-2" decimals="2" id="f-47" unitRef="number">0.01</gmt:EBPParticipantContributionPretaxMinimumAnnualCompensationToTotalCompensationPercentage>
    <us-gaap-ebp:EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationToTotalCompensationPercentage contextRef="c-2" decimals="2" id="f-48" unitRef="number">0.50</us-gaap-ebp:EmployeeBenefitPlanParticipantContributionPretaxMaximumAnnualCompensationToTotalCompensationPercentage>
    <gmt:EBPParticipantContributionPretaxAnnualCompensationToTotalCompensationCatchUpContributionsPercentage contextRef="c-7" decimals="2" id="f-49" unitRef="number">0.01</gmt:EBPParticipantContributionPretaxAnnualCompensationToTotalCompensationCatchUpContributionsPercentage>
    <gmt:EBPParticipantContributionPretaxAnnualCompensationToTotalCompensationCatchUpContributionsPercentage contextRef="c-8" decimals="2" id="f-50" unitRef="number">0.25</gmt:EBPParticipantContributionPretaxAnnualCompensationToTotalCompensationCatchUpContributionsPercentage>
    <gmt:EBPRequisiteServicePeriod contextRef="c-2" id="f-51">P6M</gmt:EBPRequisiteServicePeriod>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage contextRef="c-9" decimals="2" id="f-52" unitRef="number">0.03</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage>
    <us-gaap-ebp:EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage contextRef="c-10" decimals="2" id="f-53" unitRef="number">0.03</us-gaap-ebp:EmployeeBenefitPlanEmployerContributionParticipantCompensationMatchedPercentage>
    <gmt:EBPContributionVestingPercentage contextRef="c-2" decimals="2" id="f-54" unitRef="number">1</gmt:EBPContributionVestingPercentage>
    <gmt:EBPInvoluntaryCashOutLimit contextRef="c-2" decimals="-3" id="f-55" unitRef="usd">1000</gmt:EBPInvoluntaryCashOutLimit>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount contextRef="c-3" decimals="INF" id="f-56" unitRef="usd">50000</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingAmount>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage contextRef="c-3" decimals="2" id="f-57" unitRef="number">0.50</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAccountMaximumBorrowingToTotalAccountPercentage>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan contextRef="c-11" decimals="-3" id="f-58" unitRef="usd">129000</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan contextRef="c-12" decimals="-3" id="f-59" unitRef="usd">168000</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitTransferToFromExternalPlan>
    <us-gaap-ebp:EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock contextRef="c-2" id="f-63">Significant Accounting Policies&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Basis of Presentation&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The accompanying financial statements were prepared on the accrual basis in accordance with U.S. Generally Accepted Accounting Principles (GAAP).&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Use of Estimates&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The preparation of financial statements in accordance with GAAP necessitates management to make estimates and assumptions that affect the amounts reported in the financial statements, accompanying notes and supplemental schedule. The Plan regularly evaluates its estimates and judgments based on historical experience and other relevant facts and circumstances. Actual results could differ from these estimates. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Contributions &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Contributions from Plan participants and the matching contributions from the Employer are recorded in the year in which the employee contributions are withheld from compensation. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Participant Distributions and Withdrawals&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Participant distributions and withdrawals are recorded when paid. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Notes Receivable from Participants&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Notes receivable from participants represent participant loans that are recorded at their unpaid principal balance plus any accrued but unpaid interest. Interest income on notes receivable from participants is recorded when it is earned. No allowance for credit losses has been recorded as of December 31, 2025 or 2024. If a participant ceases to make loan repayments and the Plan administrator deems the participant loan to be a distribution, the participant loan balance is reduced and a benefit payment is recorded. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Investment Valuation and Income Recognition&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Investments held by the Plan are stated at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.&#160;See "Note 5. Fair Value of Financial Instruments" for further discussion and disclosures related to fair value measurements. &lt;/span&gt;&lt;/div&gt;Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded as earned. Dividends are recorded on the ex-dividend date. Investment gains and losses include those that are realized and unrealized.</us-gaap-ebp:EmployeeBenefitPlanSummaryOfAccountingPolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock contextRef="c-2" id="f-64">&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Basis of Presentation&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The accompanying financial statements were prepared on the accrual basis in accordance with U.S. Generally Accepted Accounting Principles (GAAP).&lt;/span&gt;&lt;/div&gt;</us-gaap-ebp:EmployeeBenefitPlanBasisOfAccountingPolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanUseOfEstimatePolicyTextBlock contextRef="c-2" id="f-65">&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Use of Estimates&lt;/span&gt;&lt;/div&gt;The preparation of financial statements in accordance with GAAP necessitates management to make estimates and assumptions that affect the amounts reported in the financial statements, accompanying notes and supplemental schedule. The Plan regularly evaluates its estimates and judgments based on historical experience and other relevant facts and circumstances. Actual results could differ from these estimates.</us-gaap-ebp:EmployeeBenefitPlanUseOfEstimatePolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanContributionPolicyTextBlock contextRef="c-2" id="f-66">&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Contributions &lt;/span&gt;&lt;/div&gt;Contributions from Plan participants and the matching contributions from the Employer are recorded in the year in which the employee contributions are withheld from compensation.</us-gaap-ebp:EmployeeBenefitPlanContributionPolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock contextRef="c-2" id="f-67">&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Participant Distributions and Withdrawals&lt;/span&gt;&lt;/div&gt;Participant distributions and withdrawals are recorded when paid.</us-gaap-ebp:EmployeeBenefitPlanPaymentToParticipantPolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock contextRef="c-2" id="f-68">&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Notes Receivable from Participants&lt;/span&gt;&lt;/div&gt;Notes receivable from participants represent participant loans that are recorded at their unpaid principal balance plus any accrued but unpaid interest. Interest income on notes receivable from participants is recorded when it is earned. No allowance for credit losses has been recorded as of December 31, 2025 or 2024. If a participant ceases to make loan repayments and the Plan administrator deems the participant loan to be a distribution, the participant loan balance is reduced and a benefit payment is recorded.</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantPolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAllowanceForCreditLoss contextRef="c-4" decimals="INF" id="f-69" unitRef="usd">0</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAllowanceForCreditLoss>
    <us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAllowanceForCreditLoss contextRef="c-3" decimals="INF" id="f-70" unitRef="usd">0</us-gaap-ebp:EmployeeBenefitPlanNoteReceivableFromParticipantAllowanceForCreditLoss>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPolicyTextBlock contextRef="c-2" id="f-71">&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Investment Valuation and Income Recognition&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Investments held by the Plan are stated at fair value. Fair value is defined as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date.&#160;See "Note 5. Fair Value of Financial Instruments" for further discussion and disclosures related to fair value measurements. &lt;/span&gt;&lt;/div&gt;Purchases and sales of securities are recorded on a trade-date basis. Interest income is recorded as earned. Dividends are recorded on the ex-dividend date. Investment gains and losses include those that are realized and unrealized.</us-gaap-ebp:EmployeeBenefitPlanInvestmentPolicyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanRiskAndUncertaintyTextBlock contextRef="c-2" id="f-72">Risks and UncertaintiesThe Plan invests in various investment securities. Investment securities are exposed to various risks such as interest rate, market volatility and credit risk. Due to the level of risk associated with certain investment securities, it is at least reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect participants' account balances and the amounts reported on the statement of net assets available for benefits.</us-gaap-ebp:EmployeeBenefitPlanRiskAndUncertaintyTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanMasterTrustTextBlock contextRef="c-2" id="f-73">GATX Corporation Master Trust &lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The Plan's investments are held in the GATX Corporation Master Trust (Master Trust) which was established for the investment of assets of the Plan and one other Company sponsored retirement savings plan. The Master Trust assets are allocated among the participating plans by assigning to each plan those transactions (primarily contributions, benefit payments and plan-specific expenses) that can be specifically identified and by allocating among both plans, in proportion to the fair value of the assets assigned to each plan, income and expenses resulting from the collective investment of the assets of the Master Trust. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following tables present the Master Trust balances and the Plan's interest in the Master Trust balances:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;margin-top:5pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:68.797%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.584%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.534%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.585%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;December 31, 2025&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Plan's Interest in Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Mutual funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;114,161,653&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;97,117,908&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;GATX common stock fund&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;31,944,636&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;30,995,772&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Collective trusts&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;141,449,235&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;135,641,629&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total investments at fair value&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;287,555,524&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;263,755,309&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Plus:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Other receivables&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;918&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;891&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Net assets at end of year&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;287,556,442&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;263,756,200&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:68.797%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.584%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.534%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.585%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;December 31, 2024&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Plan's Interest in Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Mutual funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;98,986,627&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;84,186,812&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;GATX common stock fund&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;30,869,976&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;29,640,088&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Collective trusts&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;130,498,282&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;124,398,524&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total investments at fair value&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;260,354,885&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;238,225,424&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Plus:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Other receivables&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,195&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,147&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Net assets at end of year&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;260,356,080&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;238,226,571&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table presents the net appreciation in fair value of investments and investment income of the Master Trust:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-top:5pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:68.797%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.584%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.534%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.585%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Years Ended December 31&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;2025&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;2024&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Net appreciation in fair value of investments&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;34,373,723&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;34,703,767&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Interest and dividend income&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;3,958,425&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,692,811&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total investment income&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;38,332,148&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;38,396,578&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;</us-gaap-ebp:EmployeeBenefitPlanMasterTrustTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanMasterTrustTableTextBlock contextRef="c-2" id="f-74">&lt;div style="margin-bottom:14pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following tables present the Master Trust balances and the Plan's interest in the Master Trust balances:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;margin-top:5pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:68.797%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.584%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.534%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.585%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;December 31, 2025&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Plan's Interest in Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Mutual funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;114,161,653&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;97,117,908&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;GATX common stock fund&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;31,944,636&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;30,995,772&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Collective trusts&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;141,449,235&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;135,641,629&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total investments at fair value&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;287,555,524&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;263,755,309&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Plus:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Other receivables&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;918&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;891&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Net assets at end of year&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;287,556,442&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;263,756,200&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:68.797%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.584%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.534%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.585%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;December 31, 2024&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Plan's Interest in Master Trust Balances&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Mutual funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;98,986,627&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;84,186,812&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;GATX common stock fund&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;30,869,976&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;29,640,088&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Collective trusts&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;130,498,282&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;124,398,524&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total investments at fair value&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;260,354,885&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;238,225,424&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Plus:&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-indent:9pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Other receivables&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,195&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;1,147&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Net assets at end of year&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;260,356,080&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;238,226,571&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;td colspan="3" style="display:none"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following table presents the net appreciation in fair value of investments and investment income of the Master Trust:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-top:5pt"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.561%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:68.797%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.584%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.534%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.585%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Years Ended December 31&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;2025&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000;padding:2px 1pt;text-align:center;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;2024&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Net appreciation in fair value of investments&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;34,373,723&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;34,703,767&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Interest and dividend income&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;3,958,425&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;3,692,811&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total investment income&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;38,332,148&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;38,396,578&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;</us-gaap-ebp:EmployeeBenefitPlanMasterTrustTableTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-13" decimals="0" id="f-75" unitRef="usd">114161653</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-14" decimals="0" id="f-76" unitRef="usd">97117908</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-15" decimals="0" id="f-77" unitRef="usd">31944636</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-16" decimals="0" id="f-78" unitRef="usd">30995772</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-17" decimals="0" id="f-79" unitRef="usd">141449235</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-18" decimals="0" id="f-80" unitRef="usd">135641629</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-19" decimals="0" id="f-81" unitRef="usd">287555524</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-20" decimals="0" id="f-82" unitRef="usd">263755309</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanOtherReceivable contextRef="c-19" decimals="0" id="f-83" unitRef="usd">918</us-gaap-ebp:EmployeeBenefitPlanOtherReceivable>
    <us-gaap-ebp:EmployeeBenefitPlanOtherReceivable contextRef="c-20" decimals="0" id="f-84" unitRef="usd">891</us-gaap-ebp:EmployeeBenefitPlanOtherReceivable>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-19" decimals="0" id="f-85" unitRef="usd">287556442</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-20" decimals="0" id="f-86" unitRef="usd">263756200</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-21" decimals="0" id="f-87" unitRef="usd">98986627</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-22" decimals="0" id="f-88" unitRef="usd">84186812</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-23" decimals="0" id="f-89" unitRef="usd">30869976</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-24" decimals="0" id="f-90" unitRef="usd">29640088</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-25" decimals="0" id="f-91" unitRef="usd">130498282</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-26" decimals="0" id="f-92" unitRef="usd">124398524</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-27" decimals="0" id="f-93" unitRef="usd">260354885</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue contextRef="c-28" decimals="0" id="f-94" unitRef="usd">238225424</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanOtherReceivable contextRef="c-27" decimals="0" id="f-95" unitRef="usd">1195</us-gaap-ebp:EmployeeBenefitPlanOtherReceivable>
    <us-gaap-ebp:EmployeeBenefitPlanOtherReceivable contextRef="c-28" decimals="0" id="f-96" unitRef="usd">1147</us-gaap-ebp:EmployeeBenefitPlanOtherReceivable>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-27" decimals="0" id="f-97" unitRef="usd">260356080</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit contextRef="c-28" decimals="0" id="f-98" unitRef="usd">238226571</us-gaap-ebp:EmployeeBenefitPlanNetAssetAvailableForBenefit>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment contextRef="c-29" decimals="0" id="f-99" unitRef="usd">34373723</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment contextRef="c-30" decimals="0" id="f-100" unitRef="usd">34703767</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForGainLossOnInvestment>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment contextRef="c-29" decimals="0" id="f-101" unitRef="usd">3958425</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment contextRef="c-30" decimals="0" id="f-102" unitRef="usd">3692811</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseForInterestAndDividendIncomeOnInvestment>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment contextRef="c-29" decimals="0" id="f-103" unitRef="usd">38332148</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment>
    <us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment contextRef="c-30" decimals="0" id="f-104" unitRef="usd">38396578</us-gaap-ebp:EmployeeBenefitPlanChangeInNetAssetAvailableForBenefitIncreaseDecreaseForIncomeLossOnInvestment>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock contextRef="c-2" id="f-105">Fair Value of Financial Instruments &lt;div style="margin-bottom:3pt;margin-top:3pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;As defined by GAAP, fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Fair value measurements are classified according to a three-level hierarchy based on management's judgment about the reliability of the inputs used in the fair value measurement. Level 1 inputs are quoted prices available in active markets for identical assets or liabilities. Level 2 inputs are observable, either directly or indirectly, and include quoted prices for similar assets or liabilities; quoted prices in markets that are not active; or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities. Level 3 inputs are unobservable, meaning they are supported by little or no market activity.  &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:3pt;margin-top:3pt;text-align:justify"&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:3pt;margin-top:3pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The level in the fair value hierarchy within which a fair value measurement is classified is determined based on the lowest level input that is significant to the fair value measure in its entirety. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:3pt;margin-top:3pt;text-align:justify"&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:3pt;margin-top:3pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following tables set forth the fair value of the GATX Corporation Master Trust's assets:  &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-top:5pt;text-align:center"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.415%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:69.341%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.311%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.535%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.313%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Assets at Fair Value&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;(Level 1) *&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;&#160;December 31, 2025&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;&#160;December 31, 2024&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Mutual funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;114,161,653&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;98,986,627&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;GATX common stock fund&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;31,944,636&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;30,869,976&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Collective trusts&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;141,449,235&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;130,498,282&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total assets at fair value&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;287,555,524&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;260,354,885&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-top:5pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;______________&lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;(*)  As of December 31, 2025 and December 31, 2024 all assets were classified as level 1. There were no assets classified as level  2 and level 3. &lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following is a description of the valuation techniques and inputs used as of December 31, 2025 and 2024:&lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Mutual funds&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;: Valued at quoted market prices, which represent the net asset value (NAV) of shares held at year-end.  &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;GATX common stock fund&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;: Tracked on a unitized basis and consists of shares of GATX common stock and cash sufficient to meet the fund's daily cash needs. Unitizing the GATX common stock fund allows for daily trades into and out of the fund. The value of a unit reflects the combined quoted market price of GATX common stock, which is traded on an active exchange, and the cash investments, which are held in a money market fund and valued at quoted market prices, which represent the NAV's of shares held at year-end. &lt;/span&gt;&lt;/div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-style:italic;font-weight:400;line-height:120%"&gt;Collective trusts&lt;/span&gt;: Valued based on the closing NAV prices provided by the administrator of the funds.</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValueAndNavTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock contextRef="c-2" id="f-106">&lt;div style="margin-bottom:3pt;margin-top:3pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;The following tables set forth the fair value of the GATX Corporation Master Trust's assets:  &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-top:5pt;text-align:center"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.415%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:69.341%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.311%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.535%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.313%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Assets at Fair Value&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;(Level 1) *&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;&#160;December 31, 2025&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;&#160;December 31, 2024&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Mutual funds&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;114,161,653&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;98,986,627&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;GATX common stock fund&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;31,944,636&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;30,869,976&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Collective trusts&lt;/span&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;141,449,235&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;130,498,282&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Total assets at fair value&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;287,555,524&lt;/span&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#ffffff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;260,354,885&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div style="margin-top:5pt"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;______________&lt;/span&gt;&lt;/div&gt;(*)  As of December 31, 2025 and December 31, 2024 all assets were classified as level 1. There were no assets classified as level  2 and level 3.</us-gaap-ebp:EmployeeBenefitPlanInvestmentFairValueAndNavTableTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-31" decimals="0" id="f-107" unitRef="usd">114161653</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-32" decimals="0" id="f-108" unitRef="usd">98986627</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-33" decimals="0" id="f-109" unitRef="usd">31944636</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-34" decimals="0" id="f-110" unitRef="usd">30869976</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-35" decimals="0" id="f-111" unitRef="usd">141449235</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-36" decimals="0" id="f-112" unitRef="usd">130498282</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-37" decimals="0" id="f-113" unitRef="usd">287555524</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-38" decimals="0" id="f-114" unitRef="usd">260354885</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-39" decimals="INF" id="f-115" unitRef="usd">0</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-40" decimals="INF" id="f-116" unitRef="usd">0</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-41" decimals="INF" id="f-117" unitRef="usd">0</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue contextRef="c-42" decimals="INF" id="f-118" unitRef="usd">0</us-gaap-ebp:EmployeeBenefitPlanInvestmentPlanInterestInMasterTrustFairValue>
    <us-gaap-ebp:EmployeeBenefitPlanTaxStatusTextBlock contextRef="c-2" id="f-119">Income Tax Status&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:115%"&gt;The Plan has received a determination letter from the Internal Revenue Service (IRS) dated August 1, 2017, stating that the Plan is qualified under Section 401(a) of the Internal Revenue Code (the Code), and, therefore, the related trust is exempt from taxation. Subsequent to this determination by the IRS, the Plan was restated. Once qualified, the Plan is required to operate in conformity with the Code to maintain its qualified status. The plan administrator believes the Plan is being operated in compliance with the applicable requirements of the Code and, therefore, believes the Plan, as restated, is qualified and the related trust is tax-exempt. &lt;/span&gt;&lt;/div&gt;&lt;div style="margin-bottom:14pt;text-align:justify"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:112%"&gt;Accounting principles generally accepted in the United States require plan management to evaluate tax positions taken by the Plan and recognize a tax liability if the Plan has taken an uncertain position that more likely than not would not be sustained upon examination by the IRS. Plan management has analyzed the tax positions taken by the Plan, and has concluded that there are no uncertain positions taken or expected to be taken. The Plan is subject to routine audits by taxing jurisdictions; however, there are currently no audits for any tax periods in progress.&lt;/span&gt;&lt;/div&gt;</us-gaap-ebp:EmployeeBenefitPlanTaxStatusTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock contextRef="c-2" id="f-120">Related Party and Party-in-Interest TransactionsThe Plan holds units of collective trusts and shares of a money market fund, which are managed by Fidelity Management Trust Company, the trustee of the Plan. The Plan also invests in the common stock of the Company and provides participant loans. These transactions qualify as party-in-interest transactions; however, they are exempt from the prohibited transactions rules under ERISA.</us-gaap-ebp:EmployeeBenefitPlanRelatedPartyAndPartyInInterestTransactionsTextBlock>
    <us-gaap-ebp:EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock contextRef="c-2" id="f-121">&lt;div style="min-height:72pt;width:100%"&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:12pt;font-weight:700;line-height:120%"&gt;GATX Corporation Salaried Employees Retirement Savings Plan&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:right"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;EIN 36-1124040&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:right"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;Plan #002&lt;/span&gt;&lt;/div&gt;&lt;/div&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;Schedule H, Line 4i - Schedule of Assets (Held at End of Year)&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:center"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:120%"&gt;December&#160;31, 2025&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:center"&gt;&lt;span&gt;&lt;br/&gt;&lt;/span&gt;&lt;/div&gt;&lt;div style="text-align:center"&gt;&lt;table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:99.269%"&gt;&lt;tr&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:83.288%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:0.536%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;td style="width:1.0%"&gt;&lt;/td&gt;&lt;td style="width:13.776%"&gt;&lt;/td&gt;&lt;td style="width:0.1%"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Identity of Issuer/Description of Issue&lt;/span&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:0 1pt"&gt;&lt;/td&gt;&lt;td colspan="3" style="padding:2px 1pt;text-align:center;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:700;line-height:100%"&gt;Current Value&lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr&gt;&lt;td colspan="3" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt;text-align:left;vertical-align:middle"&gt;&lt;div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;Participant loans (3.50% to 6.00% interest rates, various maturities)*&lt;/span&gt;&lt;/div&gt;&lt;/td&gt;&lt;td colspan="3" style="background-color:#cceeff;padding:0 1pt"&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;$&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:middle"&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:100%"&gt;2,073,522&#160;&lt;/span&gt;&lt;/td&gt;&lt;td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:middle"&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;_________________&lt;/span&gt;&lt;/div&gt;&lt;div&gt;&lt;span style="color:#000000;font-family:'Times New Roman',serif;font-size:10pt;font-weight:400;line-height:120%"&gt;(*) Party-in-interest to the Plan.&lt;/span&gt;&lt;/div&gt;</us-gaap-ebp:EmployeeBenefitPlanScheduleOfAssetHeldForInvestmentTableTextBlock>
    <dei:EntityTaxIdentificationNumber contextRef="c-2" id="f-122">36-1124040</dei:EntityTaxIdentificationNumber>
    <us-gaap-ebp:EmployeeBenefitPlanPlanNumber contextRef="c-2" id="f-123">002</us-gaap-ebp:EmployeeBenefitPlanPlanNumber>
    <us-gaap-ebp:EmployeeBenefitPlanParticipantLoanInterestRate contextRef="c-7" decimals="INF" id="f-124" unitRef="number">0.0350</us-gaap-ebp:EmployeeBenefitPlanParticipantLoanInterestRate>
    <us-gaap-ebp:EmployeeBenefitPlanParticipantLoanInterestRate contextRef="c-8" decimals="INF" id="f-125" unitRef="number">0.0600</us-gaap-ebp:EmployeeBenefitPlanParticipantLoanInterestRate>
    <us-gaap-ebp:EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution contextRef="c-3" decimals="0" id="f-126" unitRef="usd">2073522</us-gaap-ebp:EmployeeBenefitPlanAssetHeldForInvestmentParticipantLoanAfterDeemedDistribution>
</xbrl>
