<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.26.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>179</ContextCount>
  <ElementCount>335</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>64</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document And Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document And Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedStatementsOfOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00205 - Statement - Consolidated Statements of Operations (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedStatementsOfOperationsParenthetical</Role>
      <ShortName>Consolidated Statements of Operations (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00300 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedStatementsOfComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00400 - Statement - Consolidated Statements of Shareholders' Deficit</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedStatementsOfShareholdersDeficit</Role>
      <ShortName>Consolidated Statements of Shareholders' Deficit</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>00500 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10101 - Disclosure - Basis of Presentation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureBasisOfPresentation</Role>
      <ShortName>Basis of Presentation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10301 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10401 - Disclosure - Cash, Cash Equivalents, and Restricted Cash</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCash</Role>
      <ShortName>Cash, Cash Equivalents, and Restricted Cash</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10501 - Disclosure - Costs and Estimated Earnings on Uncompleted Contracts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContracts</Role>
      <ShortName>Costs and Estimated Earnings on Uncompleted Contracts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10601 - Disclosure - Prepaid Expenses and Other Current Assets and Other Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssets</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10701 - Disclosure - Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAcquisitions</Role>
      <ShortName>Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10801 - Disclosure - Property and Equipment, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNet</Role>
      <ShortName>Property and Equipment, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10901 - Disclosure - Intangible Assets, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureIntangibleAssetsNet</Role>
      <ShortName>Intangible Assets, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>11001 - Disclosure - Accrued Expenses</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAccruedExpenses</Role>
      <ShortName>Accrued Expenses</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11101 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11201 - Disclosure - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureShareholdersEquity</Role>
      <ShortName>Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11301 - Disclosure - Stock-Based Compensation</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureStockBasedCompensation</Role>
      <ShortName>Stock-Based Compensation</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11401 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11501 - Disclosure - Segment Data</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureSegmentData</Role>
      <ShortName>Segment Data</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11601 - Disclosure - Earnings Per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureEarningsPerShare</Role>
      <ShortName>Earnings Per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11701 - Disclosure - Redeemable Noncontrolling Interests</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureRedeemableNoncontrollingInterests</Role>
      <ShortName>Redeemable Noncontrolling Interests</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>11801 - Disclosure - Derivatives and Hedging Activities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivities</Role>
      <ShortName>Derivatives and Hedging Activities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>20102 - Disclosure - Basis of Presentation (Policy)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureBasisOfPresentationPolicy</Role>
      <ShortName>Basis of Presentation (Policy)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>30303 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>30403 - Disclosure - Cash, Cash Equivalents, and Restricted Cash (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCashTables</Role>
      <ShortName>Cash, Cash Equivalents, and Restricted Cash (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCash</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>30503 - Disclosure - Costs and Estimated Earnings on Uncompleted Contracts (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsTables</Role>
      <ShortName>Costs and Estimated Earnings on Uncompleted Contracts (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContracts</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>30603 - Disclosure - Prepaid Expenses and Other Current Assets and Other Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssetsTables</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssets</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>30703 - Disclosure - Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAcquisitionsTables</Role>
      <ShortName>Acquisitions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureAcquisitions</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>30803 - Disclosure - Property and Equipment, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNetTables</Role>
      <ShortName>Property and Equipment, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNet</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>30903 - Disclosure - Intangible Assets, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureIntangibleAssetsNetTables</Role>
      <ShortName>Intangible Assets, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureIntangibleAssetsNet</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>31003 - Disclosure - Accrued Expenses (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAccruedExpensesTables</Role>
      <ShortName>Accrued Expenses (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureAccruedExpenses</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>31103 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebt</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>31203 - Disclosure - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureShareholdersEquityTables</Role>
      <ShortName>Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureShareholdersEquity</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>31303 - Disclosure - Stock-Based Compensation (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureStockBasedCompensationTables</Role>
      <ShortName>Stock-Based Compensation (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureStockBasedCompensation</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>31503 - Disclosure - Segment Data (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureSegmentDataTables</Role>
      <ShortName>Segment Data (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureSegmentData</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>31603 - Disclosure - Earnings Per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureEarningsPerShareTables</Role>
      <ShortName>Earnings Per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureEarningsPerShare</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>31703 - Disclosure - Redeemable Noncontrolling Interests (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureRedeemableNoncontrollingInterestsTables</Role>
      <ShortName>Redeemable Noncontrolling Interests (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureRedeemableNoncontrollingInterests</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>31803 - Disclosure - Derivatives and Hedging Activities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesTables</Role>
      <ShortName>Derivatives and Hedging Activities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivities</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>40101 - Disclosure - Basis of Presentation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureBasisOfPresentationNarrativeDetails</Role>
      <ShortName>Basis of Presentation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureBasisOfPresentationPolicy</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>40301 - Disclosure - Fair Value Measurements (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureFairValueMeasurementsNarrativeDetails</Role>
      <ShortName>Fair Value Measurements (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureFairValueMeasurementsTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>40302 - Disclosure - Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureFairValueMeasurementsSummaryOfAssetImpairmentAndDecommissionCostsDetails</Role>
      <ShortName>Fair Value Measurements (Summary of Asset Impairment and Decommission Costs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureFairValueMeasurementsTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>40401 - Disclosure - Cash, Cash Equivalents, and Restricted Cash (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCashNarrativeDetails</Role>
      <ShortName>Cash, Cash Equivalents, and Restricted Cash (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCashTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>40402 - Disclosure - Cash, Cash Equivalents, and Restricted Cash (Schedule of Cash, Cash Equivalents and Restricted Cash) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCashScheduleOfCashCashEquivalentsAndRestrictedCashDetails</Role>
      <ShortName>Cash, Cash Equivalents, and Restricted Cash (Schedule of Cash, Cash Equivalents and Restricted Cash) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCashCashEquivalentsAndRestrictedCashTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>40501 - Disclosure - Costs and Estimated Earnings on Uncompleted Contracts (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsNarrativeDetails</Role>
      <ShortName>Costs and Estimated Earnings on Uncompleted Contracts (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>40502 - Disclosure - Costs and Estimated Earnings on Uncompleted Contracts (Summary of Costs and Estimated Earnings on Uncompleted Contracts) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsSummaryOfCostsAndEstimatedEarningsOnUncompletedContractsDetails</Role>
      <ShortName>Costs and Estimated Earnings on Uncompleted Contracts (Summary of Costs and Estimated Earnings on Uncompleted Contracts) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>40503 - Disclosure - Costs and Estimated Earnings on Uncompleted Contracts (Costs and Estimated Earnings on Uncompleted Contracts Accompanying Consolidated Balance Sheets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsCostsAndEstimatedEarningsOnUncompletedContractsAccompanyingConsolidatedBalanceSheetsDetails</Role>
      <ShortName>Costs and Estimated Earnings on Uncompleted Contracts (Costs and Estimated Earnings on Uncompleted Contracts Accompanying Consolidated Balance Sheets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureCostsAndEstimatedEarningsOnUncompletedContractsTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>40601 - Disclosure - Prepaid Expenses and Other Current Assets and Other Assets (Schedule of Prepaid Expense and Other Current Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssetsScheduleOfPrepaidExpenseAndOtherCurrentAssetsDetails</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Assets (Schedule of Prepaid Expense and Other Current Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssetsTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>40602 - Disclosure - Prepaid Expenses and Other Current Assets and Other Assets (Schedule of Other Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssetsScheduleOfOtherAssetsDetails</Role>
      <ShortName>Prepaid Expenses and Other Current Assets and Other Assets (Schedule of Other Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosurePrepaidExpensesAndOtherCurrentAssetsAndOtherAssetsTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40701 - Disclosure - Acquisitions (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAcquisitionsNarrativeDetails</Role>
      <ShortName>Acquisitions (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureAcquisitionsTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>40703 - Disclosure - Acquisitions (Schedule of Acquisition Capital Expenditures) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAcquisitionsScheduleOfAcquisitionCapitalExpendituresDetails</Role>
      <ShortName>Acquisitions (Schedule of Acquisition Capital Expenditures) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureAcquisitionsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>40704 - Disclosure - Acquisitions (Schedule of Acquisition of Towers and Related Asset and Liabilities by Assets Class) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAcquisitionsScheduleOfAcquisitionOfTowersAndRelatedAssetAndLiabilitiesByAssetsClassDetails</Role>
      <ShortName>Acquisitions (Schedule of Acquisition of Towers and Related Asset and Liabilities by Assets Class) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureAcquisitionsTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>40801 - Disclosure - Property and Equipment, Net (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNetNarrativeDetails</Role>
      <ShortName>Property and Equipment, Net (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNetTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>40802 - Disclosure - Property and Equipment, Net (Property and Equipment, Net) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNetPropertyAndEquipmentNetDetails</Role>
      <ShortName>Property and Equipment, Net (Property and Equipment, Net) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosurePropertyAndEquipmentNetTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>40901 - Disclosure - Intangible Assets, Net (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureIntangibleAssetsNetNarrativeDetails</Role>
      <ShortName>Intangible Assets, Net (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureIntangibleAssetsNetTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>40902 - Disclosure - Intangible Assets, Net (Gross and Net Carrying Amounts for each Major Class of Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureIntangibleAssetsNetGrossAndNetCarryingAmountsForEachMajorClassOfIntangibleAssetsDetails</Role>
      <ShortName>Intangible Assets, Net (Gross and Net Carrying Amounts for each Major Class of Intangible Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureIntangibleAssetsNetTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>41001 - Disclosure - Accrued Expenses (Schedule of Accrued Expenses) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureAccruedExpensesScheduleOfAccruedExpensesDetails</Role>
      <ShortName>Accrued Expenses (Schedule of Accrued Expenses) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureAccruedExpensesTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>41102 - Disclosure - Debt (Revolving Credit Facility under the Senior Credit Agreement) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtRevolvingCreditFacilityUnderSeniorCreditAgreementNarrativeDetails</Role>
      <ShortName>Debt (Revolving Credit Facility under the Senior Credit Agreement) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>41103 - Disclosure - Debt (Term Loan under the Senior Credit Agreement) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtTermLoanUnderSeniorCreditAgreementNarrativeDetails</Role>
      <ShortName>Debt (Term Loan under the Senior Credit Agreement) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>41105 - Disclosure - Debt (Secured Tower Revenue Securities) (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtSecuredTowerRevenueSecuritiesNarrativeDetails</Role>
      <ShortName>Debt (Secured Tower Revenue Securities) (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>41108 - Disclosure - Debt (Schedule of Principal Values, Fair Values, and Carrying Values of Debt) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtScheduleOfPrincipalValuesFairValuesAndCarryingValuesOfDebtDetails</Role>
      <ShortName>Debt (Schedule of Principal Values, Fair Values, and Carrying Values of Debt) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>41110 - Disclosure - Debt (Schedule of Cash and Non-Cash Interest Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtScheduleOfCashAndNonCashInterestExpenseDetails</Role>
      <ShortName>Debt (Schedule of Cash and Non-Cash Interest Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>41111 - Disclosure - Debt (Schedule of Revolving Credit Facility Key Terms) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtScheduleOfRevolvingCreditFacilityKeyTermsDetails</Role>
      <ShortName>Debt (Schedule of Revolving Credit Facility Key Terms) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>41112 - Disclosure - Debt (Summary of Revolving Credit Facility Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDebtSummaryOfRevolvingCreditFacilityActivityDetails</Role>
      <ShortName>Debt (Summary of Revolving Credit Facility Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDebtTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>41201 - Disclosure - Shareholders' Equity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureShareholdersEquityNarrativeDetails</Role>
      <ShortName>Shareholders' Equity (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureShareholdersEquityTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>41205 - Disclosure - Shareholders' Equity (Schedule of Dividends Paid and Dividends Declared) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureShareholdersEquityScheduleOfDividendsPaidAndDividendsDeclaredDetails</Role>
      <ShortName>Shareholders' Equity (Schedule of Dividends Paid and Dividends Declared) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureShareholdersEquityTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>41301 - Disclosure - Stock-Based Compensation (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureStockBasedCompensationNarrativeDetails</Role>
      <ShortName>Stock-Based Compensation (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>41303 - Disclosure - Stock-Based Compensation (Summary of Restricted Stock Unit and Performance Based Restricted Stock Unit Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureStockBasedCompensationSummaryOfRestrictedStockUnitAndPerformanceBasedRestrictedStockUnitActivityDetails</Role>
      <ShortName>Stock-Based Compensation (Summary of Restricted Stock Unit and Performance Based Restricted Stock Unit Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>41304 - Disclosure - Stock-Based Compensation (Summary of Stock Option Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureStockBasedCompensationSummaryOfStockOptionActivityDetails</Role>
      <ShortName>Stock-Based Compensation (Summary of Stock Option Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureStockBasedCompensationTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>41401 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureIncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>41501 - Disclosure - Segment Data (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureSegmentDataNarrativeDetails</Role>
      <ShortName>Segment Data (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureSegmentDataTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>41502 - Disclosure - Segment Data (Schedule of Segment Reporting Information) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureSegmentDataScheduleOfSegmentReportingInformationDetails</Role>
      <ShortName>Segment Data (Schedule of Segment Reporting Information) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureSegmentDataTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>41503 - Disclosure - Segment Data (Schedule of Long-Lived Assets by Geographic Areas) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureSegmentDataScheduleOfLongLivedAssetsByGeographicAreasDetails</Role>
      <ShortName>Segment Data (Schedule of Long-Lived Assets by Geographic Areas) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureSegmentDataTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>41602 - Disclosure - Earnings Per Share (Weighted-Average Shares of Common Stock Outstanding used in Calculation of Basic and Diluted Earnings Per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureEarningsPerShareWeightedAverageSharesOfCommonStockOutstandingUsedInCalculationOfBasicAndDilutedEarningsPerShareDetails</Role>
      <ShortName>Earnings Per Share (Weighted-Average Shares of Common Stock Outstanding used in Calculation of Basic and Diluted Earnings Per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureEarningsPerShareTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>41702 - Disclosure - Redeemable Noncontrolling Interests (Components of Redeemable Noncontrolling Interest) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureRedeemableNoncontrollingInterestsComponentsOfRedeemableNoncontrollingInterestDetails</Role>
      <ShortName>Redeemable Noncontrolling Interests (Components of Redeemable Noncontrolling Interest) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureRedeemableNoncontrollingInterestsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>41801 - Disclosure - Derivatives and Hedging Activities (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesNarrativeDetails</Role>
      <ShortName>Derivatives and Hedging Activities (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>41802 - Disclosure - Derivatives and Hedging Activities (Schedule of Effects of Interest Rate Swaps on the Consolidated Balance Sheets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesScheduleOfEffectsOfInterestRateSwapsOnConsolidatedBalanceSheetsDetails</Role>
      <ShortName>Derivatives and Hedging Activities (Schedule of Effects of Interest Rate Swaps on the Consolidated Balance Sheets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>41803 - Disclosure - Derivatives and Hedging Activities (Schedule of Effect of Derivatives on the Consolidated Statements of Operations and Consolidated Statements of Shareholders??? Deficit) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesScheduleOfEffectOfDerivativesOnConsolidatedStatementsOfOperationsAndConsolidatedStatementsOfShareholdersDeficitDetails</Role>
      <ShortName>Derivatives and Hedging Activities (Schedule of Effect of Derivatives on the Consolidated Statements of Operations and Consolidated Statements of Shareholders??? Deficit) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.sbasite.com/role/DisclosureDerivativesAndHedgingActivitiesTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="sbac-20260331x10q.htm">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>995445 - Disclosure - Insider Trading Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements</Role>
      <ShortName>Insider Trading Arrangements</ShortName>
      <MenuCategory>Uncategorized</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>sbac-20260331.xsd</File>
    <File>sbac-20260331_cal.xml</File>
    <File>sbac-20260331_def.xml</File>
    <File>sbac-20260331_lab.xml</File>
    <File>sbac-20260331_pre.xml</File>
    <File doctype="10-Q" isDefinitelyFs="true" isUsgaap="true" original="sbac-20260331x10q.htm">sbac-20260331x10q.htm</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy items="1">http://fasb.org/srt/2025</BaseTaxonomy>
    <BaseTaxonomy items="738">http://fasb.org/us-gaap/2025</BaseTaxonomy>
    <BaseTaxonomy items="29">http://xbrl.sec.gov/dei/2025</BaseTaxonomy>
    <BaseTaxonomy items="4">http://xbrl.sec.gov/ecd/2025</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
