<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:sho="http://www.sunstonehotels.com/20260623"
  xmlns:us-gaap="http://fasb.org/us-gaap/2025"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="sho-20260623.xsd" xlink:type="simple"/>
    <context id="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_SeriesHPreferredStockMember_SE30hawFOUukDnI5DGRRpA">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001295810</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:SeriesHPreferredStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-23</startDate>
            <endDate>2026-06-23</endDate>
        </period>
    </context>
    <context id="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_CommonStockMember_7TeanusSKku2PYInjCy9SA">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001295810</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">us-gaap:CommonStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-23</startDate>
            <endDate>2026-06-23</endDate>
        </period>
    </context>
    <context id="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_sho_SeriesIPreferredStockMember_GOtKXlQu70q5poRTCE7OiQ">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001295810</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">sho:SeriesIPreferredStockMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-23</startDate>
            <endDate>2026-06-23</endDate>
        </period>
    </context>
    <context id="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001295810</identifier>
        </entity>
        <period>
            <startDate>2026-06-23</startDate>
            <endDate>2026-06-23</endDate>
        </period>
    </context>
    <dei:EntityCentralIndexKey
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_SsTiuGv9I0yaVHLmTF2YcA_2_1">0001295810</dei:EntityCentralIndexKey>
    <dei:AmendmentFlag
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_PHd0uzjGqk6PWcfOqIC37w_3_1">false</dei:AmendmentFlag>
    <dei:DocumentType
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_i4VpUelSIUm9RXXXgNXzdA">8-K</dei:DocumentType>
    <dei:DocumentPeriodEndDate
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_SJ33zY6UekiKhYJxFPLmdQ">2026-06-23</dei:DocumentPeriodEndDate>
    <dei:EntityRegistrantName
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_Jg8XN_jBlEGXCiAtiSZFvg">Sunstone Hotel Investors, Inc.</dei:EntityRegistrantName>
    <dei:EntityIncorporationStateCountryCode
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_DMc8JDUM80u-0y-ySDU6TQ_2_0">MD</dei:EntityIncorporationStateCountryCode>
    <dei:EntityFileNumber
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_5rjduw0ONEuVPLvpiYaAOQ_2_1">001-32319</dei:EntityFileNumber>
    <dei:EntityTaxIdentificationNumber
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_LHxCnHAiN0Sy8kt75DW2ZA_2_2">20-1296886</dei:EntityTaxIdentificationNumber>
    <dei:EntityAddressAddressLine1
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_yt9vBR0i3EiaijDDe1AHyg">15 Enterprise, Suite 200</dei:EntityAddressAddressLine1>
    <dei:EntityAddressCityOrTown
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_VWRC64pI0ECtWCDDVsQ-Nw">Aliso Viejo</dei:EntityAddressCityOrTown>
    <dei:EntityAddressStateOrProvince
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_kPYQdwTa6Uyahw7QlB_o7Q">CA</dei:EntityAddressStateOrProvince>
    <dei:EntityAddressPostalZipCode
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_nRwTcZxjnkKY5CcTcK-ryg_1_2">92656</dei:EntityAddressPostalZipCode>
    <dei:CityAreaCode
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_yBnP5isfx0CFlZr2vyDbDA">949</dei:CityAreaCode>
    <dei:LocalPhoneNumber
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Narr_14UL5lXV0kK68F-CId0pWQ">330-4000</dei:LocalPhoneNumber>
    <dei:WrittenCommunications
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_ffNUz5hyRkiHGtlsKNb18w_1_0">false</dei:WrittenCommunications>
    <dei:SolicitingMaterial
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_sNJxPTfKRUWJwyWBI7HBbA_2_0">false</dei:SolicitingMaterial>
    <dei:PreCommencementTenderOffer
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_ru2I33MPV0KxHEiN5c5Ykw_3_0">false</dei:PreCommencementTenderOffer>
    <dei:PreCommencementIssuerTenderOffer
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_84Uz6jCbgUewXxBykl2vKQ_4_0">false</dei:PreCommencementIssuerTenderOffer>
    <dei:Security12bTitle
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_CommonStockMember_7TeanusSKku2PYInjCy9SA"
      id="Tc_VfyX_23dDkyN5AwkWnWcIA_3_0">Common Stock, $0.01 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_CommonStockMember_7TeanusSKku2PYInjCy9SA"
      id="Tc_FiGbmoswRUy7nAfnrEoHlg_3_1">SHO</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_CommonStockMember_7TeanusSKku2PYInjCy9SA"
      id="Tc_6nJhHzVfRE2NTpj8TfOx2g_3_2">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_SeriesHPreferredStockMember_SE30hawFOUukDnI5DGRRpA"
      id="Tc_U1fe83P0E0iXSpNHmg5YGw_4_0">Series H Cumulative Redeemable Preferred Stock, $0.01 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_SeriesHPreferredStockMember_SE30hawFOUukDnI5DGRRpA"
      id="Tc_I5Eo0ZZQpEWe1cIF6fg5NQ_4_1">SHO.PRH</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_us-gaap_SeriesHPreferredStockMember_SE30hawFOUukDnI5DGRRpA"
      id="Tc_v2J7GySGi0ag-xq4YgChSw_4_2">NYSE</dei:SecurityExchangeName>
    <dei:Security12bTitle
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_sho_SeriesIPreferredStockMember_GOtKXlQu70q5poRTCE7OiQ"
      id="Tc_BN5iJJTpyEuyWRAyhbOGSQ_5_0">Series I Cumulative Redeemable Preferred Stock, $0.01 par value</dei:Security12bTitle>
    <dei:TradingSymbol
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_sho_SeriesIPreferredStockMember_GOtKXlQu70q5poRTCE7OiQ"
      id="Tc_iwi6xHmgJka1xIAghbIBug_5_1">SHO.PRI</dei:TradingSymbol>
    <dei:SecurityExchangeName
      contextRef="Duration_6_23_2026_To_6_23_2026_us-gaap_StatementClassOfStockAxis_sho_SeriesIPreferredStockMember_GOtKXlQu70q5poRTCE7OiQ"
      id="Tc_ZqBRxKfdKkSPCsaMdgtlAA_5_2">NYSE</dei:SecurityExchangeName>
    <dei:EntityEmergingGrowthCompany
      contextRef="Duration_6_23_2026_To_6_23_2026_ejnMmsk_aEa1ppcFL9GrRw"
      id="Tc_B05P0zX4fU-PHoopCtm1NQ_1_2">false</dei:EntityEmergingGrowthCompany>
</xbrl>
