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                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:NV</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_NY">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:NY</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_OH">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:OH</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_OK">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:OK</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_OR">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:OR</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_PA">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:PA</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_PowerMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">bmmfi:PowerMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_SchoolDistrictMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">bmmfi:SchoolDistrictMember</xbrldi:explicitMember>
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        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_SD">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:SD</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_StudentLoanMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:InvestmentTypeAxis">us-gaap:StudentLoanMember</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
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        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_TobacooSettlementMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">bmmfi:TobacooSettlementMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_TransportationSectorMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">us-gaap:TransportationSectorMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_TX">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:TX</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_USRelatedMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:OtherCategory1Axis">bmmfi:USRelatedMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_VA">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:VA</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_WA">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:WA</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_WaterAndSewerMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:IndustrySectorAxis">bmmfi:WaterAndSewerMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <context id="TI20250228_C000130453Member_WI">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000878092</identifier>
            <segment>
                <xbrldi:explicitMember dimension="oef:ClassAxis">bmmfi:C000130453Member</xbrldi:explicitMember>
                <xbrldi:explicitMember dimension="oef:GeographicRegionAxis">stpr:WI</xbrldi:explicitMember>
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        </entity>
        <period>
            <instant>2025-02-28</instant>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="USD_shares">
        <divide>
            <unitNumerator>
                <measure>iso4217:USD</measure>
            </unitNumerator>
            <unitDenominator>
                <measure>shares</measure>
            </unitDenominator>
        </divide>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <unit id="Day">
        <measure>utr:D</measure>
    </unit>
    <unit id="Holding">
        <measure>bmmfi:Holding</measure>
    </unit>
    <oef:PctOfNav
      contextRef="TI20250228_C000000817Member_MedicalMember"
      decimals="4"
      id="h_003a6992_9be7_4094_b85c_0d6a08b1a886"
      unitRef="pure">0.128</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046743Member_DevelopmentMember"
      decimals="4"
      id="h_019ba36f_e6df_4229_9c6b_94cff081789c"
      unitRef="pure">0.110</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000007813Member_USRelatedMember"
      decimals="4"
      id="h_01e96328_a8cf_4faa_91c4_2cc3f2def757"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046743Member_WI"
      decimals="4"
      id="h_025f75be_9e8c_4276_9ec3_c0950e7bac13"
      unitRef="pure">0.064</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073398Member_NursingHomesMember"
      decimals="4"
      id="h_03edb93e_1835_4ada_bd2f_196305f54c47"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046743Member_MD"
      decimals="4"
      id="h_05357fa2_3dbe_427e_92c7_49efe9257aeb"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130452Member_DC"
      decimals="4"
      id="h_059861f1_4292_48b6_bc1e_2f8b285cbe43"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130453Member_EducationMember"
      decimals="4"
      id="h_05f231a9_e488_4476_b948_1d3e64987567"
      unitRef="pure">0.153</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_FL"
      decimals="4"
      id="h_06c33817_b1aa_4191_9efa_976e44f9c3a6"
      unitRef="pure">0.047</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046743Member_AR"
      decimals="4"
      id="h_079e69a7_f345_436d_a52b_44c27b4a0782"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_NY"
      decimals="4"
      id="h_07bac08d_e696_4159_a436_2b95205a1796"
      unitRef="pure">0.086</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_AR"
      decimals="4"
      id="h_07e02d38_29c8_4310_a543_8bed0269ea07"
      unitRef="pure">0.012</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_SD"
      decimals="4"
      id="h_081dab93_9e05_471b_a8b5_35964f27a4f3"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_TransportationSectorMember"
      decimals="4"
      id="h_08c69683_1d51_4e2b_be0d_3700e7ba4b16"
      unitRef="pure">0.101</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_CA"
      decimals="4"
      id="h_08f801a0_c3c2_4d54_a287_aba17731ff31"
      unitRef="pure">0.040</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130453Member_TX"
      decimals="4"
      id="h_0951af4d_187b_4fb7_88f5_95a4b990d7b0"
      unitRef="pure">0.105</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130453Member_StudentLoanMember"
      decimals="4"
      id="h_0a65ddd0_8e6a_4f42_bc4d_54f799b0b0ea"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_PA"
      decimals="4"
      id="h_0aa78c97_6cf7_4095_914f_f34a9ca9ba54"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_AirportMember"
      decimals="4"
      id="h_0b26704a_8ff4_419b_8998_ed80f23376b3"
      unitRef="pure">0.102</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130452Member_TobacooSettlementMember"
      decimals="4"
      id="h_0b8ed73b_7bc1_46a9_8d2b_1a4f4eafa2b1"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_WA"
      decimals="4"
      id="h_0dfd2cdc_7cf1_4af6_abf4_e08855715d2a"
      unitRef="pure">0.034</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046743Member_TobacooSettlementMember"
      decimals="4"
      id="h_0e80e143_c4cc_49d1_be74_ebda76b55b59"
      unitRef="pure">0.072</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_IN"
      decimals="4"
      id="h_0f1877cc_8eca_4c44_ab39_010d929b7166"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130453Member_OH"
      decimals="4"
      id="h_0f5cd4fe_511a_4a29_8d50_ec59cc31df9c"
      unitRef="pure">0.035</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000817Member_MI"
      decimals="4"
      id="h_1046a0fa_e197_4687_acc7_c140d5f4f282"
      unitRef="pure">0.049</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_DevelopmentMember"
      decimals="4"
      id="h_109f0aa7_351d_4057_9d74_62c36e3805e2"
      unitRef="pure">0.045</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000817Member_NursingHomesMember"
      decimals="4"
      id="h_10dfaae3_d9d6_40f9_a7d7_5f44ca5eb33e"
      unitRef="pure">0.046</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_MedicalMember"
      decimals="4"
      id="h_114bce8f_0b98_4bd6_8142_70d2b104ccac"
      unitRef="pure">0.059</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_TobacooSettlementMember"
      decimals="4"
      id="h_1150964a_4f6b_4135_b455_fbd39e185706"
      unitRef="pure">0.037</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_NetOtherAssetsAndLiabilitiesCountryMember"
      decimals="4"
      id="h_11a098ae_53fb_4274_9aa2_0109496be28e"
      unitRef="pure">0.106</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_LA"
      decimals="4"
      id="h_11b481f2_c1bf_4d04_9c66_1972a4676f82"
      unitRef="pure">0.015</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_CO"
      decimals="4"
      id="h_130e45db_e07f_40c6_96e5_84d1c1e09d23"
      unitRef="pure">0.026</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046744Member_CA"
      decimals="4"
      id="h_13578260_6aee_47bc_b2a8_643e00950755"
      unitRef="pure">0.063</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_CO"
      decimals="4"
      id="h_135fe814_c0a2_455a_aa9c_d957281da0c7"
      unitRef="pure">0.026</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046743Member_MedicalMember"
      decimals="4"
      id="h_143f8783_c4a2_42db_b8ca_1505304bdc64"
      unitRef="pure">0.059</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130452Member_IL"
      decimals="4"
      id="h_14e91cae_4049_4cf2_a10c_d8add2914f7f"
      unitRef="pure">0.066</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073398Member_MedicalMember"
      decimals="4"
      id="h_1515be31_8daf_4caf_a676_5423756f1456"
      unitRef="pure">0.128</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000818Member_TN"
      decimals="4"
      id="h_15c0abfa_d02c_454a_b66f_9bb115e0e004"
      unitRef="pure">0.010</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_NetOtherAssetsAndLiabilitiesMember"
      decimals="4"
      id="h_15c5547a_fd2d_4f90_a9ab_fa55bda7a0e3"
      unitRef="pure">0.127</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130453Member_FL"
      decimals="4"
      id="h_15ea73a7_0ca6_4ec7_af96_d6e627040258"
      unitRef="pure">0.038</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073398Member_OH"
      decimals="4"
      id="h_15fd6de9_bdad_45e6_b12a_ac2036e63997"
      unitRef="pure">0.018</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130452Member_NetOtherAssetsAndLiabilitiesMember"
      decimals="4"
      id="h_16108b26_dd2f_4a83_9201_f536e46cdb16"
      unitRef="pure">0.183</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000000815Member_NetOtherAssetsAndLiabilitiesMember"
      decimals="4"
      id="h_174cb6f8_aeb1_48ad_9d64_2533e93ce52e"
      unitRef="pure">0.183</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046744Member_SD"
      decimals="4"
      id="h_184b1075_8a97_4901_b4e9_3e518107f5b1"
      unitRef="pure">0.011</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_NJ"
      decimals="4"
      id="h_19001284_060c_48b7_823c_2a6bc54b271b"
      unitRef="pure">0.013</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000130453Member_PA"
      decimals="4"
      id="h_1a4ee976_9de5_4c19_abde_69c7e52bba15"
      unitRef="pure">0.036</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000046744Member_MO"
      decimals="4"
      id="h_1a9704dc_dfe6_496b_82c1_e2dfaa11f567"
      unitRef="pure">0.023</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000007813Member_SchoolDistrictMember"
      decimals="4"
      id="h_1ab3011d_f685_426a_abeb_b9adcb0b1f21"
      unitRef="pure">0.033</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_USRelatedMember"
      decimals="4"
      id="h_1ad6d8e4_5235_495e_9b61_4bdaf4cbf1ab"
      unitRef="pure">0.042</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_VA"
      decimals="4"
      id="h_1bbd0aa6_84f6_4de7_98e7_1f9afe413052"
      unitRef="pure">0.026</oef:PctOfNav>
    <oef:PctOfNav
      contextRef="TI20250228_C000073399Member_AZ"
      decimals="4"
      id="h_1d2d7259_5478_43f2_86e7_0af8a17806f6"
      unitRef="pure">0.083</oef:PctOfNav>
    <oef:PctOfNav
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      id="t_1_f6f23f74_b923_5ce5_740a_9195d9ae301d">N-CSRS</dei:DocumentType>
    <dei:EntityRegistrantName
      contextRef="DefaultContext"
      id="t_1_5aac5531_ba12_88a2_dbcf_73cba765e639">BNY Mellon Municipal Funds, Inc.</dei:EntityRegistrantName>
    <dei:DocumentPeriodEndDate
      contextRef="DefaultContext"
      id="t_2_dfeb49e9_28b7_51f8_38d4_14b3596af2b4">2025-02-28</dei:DocumentPeriodEndDate>
    <oef:FundName
      contextRef="D20240829_20250228_C000000815Member"
      id="t_1_07a40c01_7109_e8c6_4102_d3db3cf4bd81">BNY Mellon AMT-Free Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000000815Member"
      id="t_2_f552fc22_399e_ff25_f32c_e36bb79ce72c">Class A</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000000815Member"
      id="t_3_4b5f31ac_a2c2_a2cb_1aeb_89131a18f641">DMUAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000000815Member"
      id="t_5_8f97197e_4014_a0e3_c53f_550164128264">This semi-annual shareholder report contains important information about BNY Mellon AMT-Free Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000000815Member"
      id="t_4_0ec25b69_fc33_8859_b230_5be587f8d18e">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000000815Member"
      id="t_6_f8c95310_fa8d_3cf8_6af9_00d92ee2ea02">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000000815Member"
      id="t_7_fbed2ea1_42d3_0f5f_330a_845ede8c10f4">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000000815Member"
      id="t_8_c95b0559_820b_bf05_9f28_339dc7505d3d">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000000815Member"
      id="t_9_3488e9b0_b9c0_c90f_b881_0007dd0cc16a">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000000815Member"
      id="t_10_9ae4d98b_8ca3_8702_2ad2_a1813c294974">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;33&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.67&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000000815Member"
      decimals="INF"
      id="h_1_eaf61187_baad_4c93_b8cb_8d04e3b7f0ff"
      unitRef="USD">33</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000000815Member"
      decimals="4"
      id="h_2_71c5cd55_b6cc_482f_bb6d_edca1cccbb0c"
      unitRef="pure">0.0067</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000000815Member"
      id="t_11_55329837_75bf_8359_bbf7_b30125e9d14b">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,913&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;547&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000000815Member"
      decimals="INF"
      id="h_3_3b0afa8a_ef93_432a_ae55_11dfcc31af22"
      unitRef="USD">1913000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000000815Member"
      decimals="INF"
      id="h_4_c52777a8_de46_4274_9a85_f3d555dc1c7f"
      unitRef="Holding">547</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000000815Member"
      decimals="4"
      id="h_5_da98d4e6_fd82_4eb7_a734_12411a9ddfd9"
      unitRef="pure">0.0525</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000000815Member"
      id="t_12_43826e3a_31a0_543f_e363_ca9f28b60fb9">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673397.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673373.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000000817Member"
      id="t_1_e84db3c1_35ba_a7ad_979f_3c8cd4471ecc">BNY Mellon AMT-Free Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000000817Member"
      id="t_2_b0fb5e05_10ba_2ffc_310f_1b75ae89eb5e">Class C</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000000817Member"
      id="t_3_a2090ae0_3a83_8413_49ef_668b96de831b">DMUCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000000817Member"
      id="t_5_e42aff2e_0c65_080e_e2dd_e8a2ca357407">This semi-annual shareholder report contains important information about BNY Mellon AMT-Free Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000000817Member"
      id="t_4_428a32a5_187e_910b_b15f_d2ba15840231">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000000817Member"
      id="t_6_983aed69_1b74_0d92_da91_2b8f24625be1">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000000817Member"
      id="t_7_1349c72b_8e38_03d2_a60c_2d02d3be0f67">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000000817Member"
      id="t_8_740ba0ea_b0cf_0eca_742e_004307ae8cef">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000000817Member"
      id="t_9_c7249bfa_064c_d560_7e15_769c3cc9e301">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000000817Member"
      id="t_10_5fd9b601_398e_bc0c_cd80_4a3e04de49cb">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class &lt;span style="white-space:nowrap"&gt;C&lt;sup style="vertical-align:baseline;position:relative;top:-0.7em;font-size:5pt"&gt;*&lt;/sup&gt;&lt;/span&gt;&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;72&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;1.44&lt;span&gt;%&lt;/span&gt;&lt;sup style="vertical-align:baseline;position:relative;top:-0.7em;font-size:5pt"&gt;**&lt;/sup&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;During the period, fees were waived and/or expenses reimbursed pursuant to an agreement with the Fund&#x2019;s investment adviser, BNY Mellon Investment Adviser, Inc. If this agreement is not extended in the future, expenses could be higher.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;**&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000000817Member"
      decimals="INF"
      id="h_6_051dd5ea_7c64_4b9d_9d3b_ddb28b356e67"
      unitRef="USD">72</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000000817Member"
      decimals="4"
      id="h_7_603216b5_6fd1_4066_baca_274fe992b247"
      unitRef="pure">0.0144</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000000817Member"
      id="t_11_7b5fcdf7_92dd_21b3_e865_824cd409f189">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,913&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;547&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000000817Member"
      decimals="INF"
      id="h_8_043a5b03_70f3_4adc_bcf7_5386d50cb92e"
      unitRef="USD">1913000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000000817Member"
      decimals="INF"
      id="h_9_94c86fe9_57a8_4061_8349_5fd4e2daff19"
      unitRef="Holding">547</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000000817Member"
      decimals="4"
      id="h_10_af32fcc3_582c_4afe_8dc6_3a4d29be19c4"
      unitRef="pure">0.0525</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000000817Member"
      id="t_12_093fe6bd_9c2c_062c_fba3_f9f9d6e49c92">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673447.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673423.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000073398Member"
      id="t_1_aab2a885_04ee_5032_d273_f4a1202755d5">BNY Mellon AMT-Free Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000073398Member"
      id="t_2_4f003d0b_3fa7_c7a7_8303_b2d17e8f0816">Class I</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000073398Member"
      id="t_3_fd3ae5d3_c288_e993_0bfc_4c79212fcd8b">DMBIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000073398Member"
      id="t_5_6821c5f4_8920_6aa8_54ae_479a3412c964">This semi-annual shareholder report contains important information about BNY Mellon AMT-Free Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000073398Member"
      id="t_4_a76be991_e490_5a97_b86f_b80fe6f3a16d">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000073398Member"
      id="t_6_0a7c2e79_fcdc_61e8_56ef_fa7e3c7fe42b">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000073398Member"
      id="t_7_a061cb35_7225_250b_a24b_528cf86fddd3">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000073398Member"
      id="t_8_7fa62074_990f_f421_f950_d3fb5c8ae48b">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000073398Member"
      id="t_9_8ffef159_6664_9988_e193_14cae0a9295e">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000073398Member"
      id="t_10_c8e6e48c_8f00_9265_14da_25b16eaedee3">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class I&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;20&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.41&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000073398Member"
      decimals="INF"
      id="h_11_d8799fb3_bb8f_471f_b04f_319224e264db"
      unitRef="USD">20</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000073398Member"
      decimals="4"
      id="h_12_e8bacfc3_3501_476c_8d0e_e93ade93d5eb"
      unitRef="pure">0.0041</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000073398Member"
      id="t_11_1719c0b2_5883_91b8_8a6e_0703c77e3ca6">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,913&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;547&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000073398Member"
      decimals="INF"
      id="h_13_4fdf3b56_3d2d_455e_9a6e_81d4064cc085"
      unitRef="USD">1913000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000073398Member"
      decimals="INF"
      id="h_14_8513d2c4_202c_4846_a568_98f94b7b0987"
      unitRef="Holding">547</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000073398Member"
      decimals="4"
      id="h_15_e0abf30e_cf54_400c_bffb_c9bd6d14fe19"
      unitRef="pure">0.0525</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000073398Member"
      id="t_12_15182808_2a7c_ad5c_8fed_0bb69f3c4814">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673497.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673473.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000130452Member"
      id="t_1_56e80720_99bb_e23c_2ffd_311a569d6952">BNY Mellon AMT-Free Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000130452Member"
      id="t_2_b1d2d8b4_6e2b_008d_f7d2_04bf9ce7b755">Class Y</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000130452Member"
      id="t_3_048ef23e_b0dc_348b_e626_ce2973d68067">DMUYX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000130452Member"
      id="t_5_b3e30f27_5d34_e0a4_d2ff_8d7267aad3cc">This semi-annual shareholder report contains important information about BNY Mellon AMT-Free Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000130452Member"
      id="t_4_232365df_b3aa_6003_f23f_ae42e8c68c12">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000130452Member"
      id="t_6_ee4ef8bc_31ed_e5f2_c9c6_d21085a798c7">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000130452Member"
      id="t_7_010f3011_5e0a_d826_fae4_f85234988164">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000130452Member"
      id="t_8_71f20e26_bf32_273e_b4f4_f06976cf6638">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000130452Member"
      id="t_9_c826c9ba_7770_1107_bc57_f2a4e0111e8b">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000130452Member"
      id="t_10_01ff281f_e724_3ca3_5630_d3aab187971d">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class Y&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;19&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.38&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000130452Member"
      decimals="INF"
      id="h_16_71e2484f_31e9_4e0a_9e7b_ed51bf1e3908"
      unitRef="USD">19</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000130452Member"
      decimals="4"
      id="h_17_95faf88e_c444_47c2_824d_d68613e50d0e"
      unitRef="pure">0.0038</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000130452Member"
      id="t_11_4abc9325_cb3b_53c3_2226_27c3e0d4239a">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,913&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;547&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000130452Member"
      decimals="INF"
      id="h_18_fa27df12_6f73_4778_b963_66a00832d187"
      unitRef="USD">1913000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000130452Member"
      decimals="INF"
      id="h_19_cedd4d85_a7c3_4b93_bcbe_da7f9b2eef19"
      unitRef="Holding">547</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000130452Member"
      decimals="4"
      id="h_20_2c822402_de0b_4bf0_b591_697bd152e758"
      unitRef="pure">0.0525</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000130452Member"
      id="t_12_0684f995_83f2_13cd_15d2_48e0c281c404">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673547.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673523.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000000818Member"
      id="t_1_3cb5a568_1ba5_36f6_227c_6e8e52521ed8">BNY Mellon AMT-Free Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000000818Member"
      id="t_2_4f6ac021_fb8c_d163_502b_bc9385b7a66b">Class Z</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000000818Member"
      id="t_3_1ba67d27_75b2_ccd6_f1d3_9cc06534830a">DRMBX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000000818Member"
      id="t_5_3d842364_0e67_f2ac_6275_9ec14aece5b4">This semi-annual shareholder report contains important information about BNY Mellon AMT-Free Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000000818Member"
      id="t_4_cde32bc7_0070_b471_b2b5_a02cac1d4552">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000000818Member"
      id="t_6_f67e8427_3a5f_5027_c35e_177c81dbcef9">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000000818Member"
      id="t_9_32a55f52_e3c6_4796_9c9d_da46ffec6a3c">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000000818Member"
      id="t_7_ec998bc5_094a_2977_15d3_c5f0167e3d33">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000000818Member"
      id="t_8_152cca1b_f301_5d26_8a55_8fba4e9e6e54">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000000818Member"
      id="t_10_9b64331b_3b53_7fed_b640_410b46e92a30">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class Z&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;26&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.53&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000000818Member"
      decimals="INF"
      id="h_21_6754b08f_eb68_4136_89e9_e85546e22480"
      unitRef="USD">26</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000000818Member"
      decimals="4"
      id="h_22_745b5fbd_c02c_4217_b7fe_cdac44db2ee6"
      unitRef="pure">0.0053</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000000818Member"
      id="t_11_01c5e05f_738c_20c7_d08b_408c5621f6ed">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;1,913&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;547&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.25&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000000818Member"
      decimals="INF"
      id="h_23_ee09fdfc_1670_459f_9849_61a80a779397"
      unitRef="USD">1913000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000000818Member"
      decimals="INF"
      id="h_24_9a7a1321_7af6_42b0_b9e1_e091e2b63bc1"
      unitRef="Holding">547</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000000818Member"
      decimals="4"
      id="h_25_cffe1fa0_d002_466e_a262_c6bf06412bac"
      unitRef="pure">0.0525</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000000818Member"
      id="t_12_41c6eb21_8c66_efe6_838c_5b9219374ebe">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673597.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673573.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000046743Member"
      id="t_1_e2de9cf8_81bf_a2c7_d15b_f55ef3046440">BNY Mellon High Yield Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000046743Member"
      id="t_2_1ff529b4_afa3_dcee_16b0_6c3d36997617">Class A</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000046743Member"
      id="t_3_b9e91c5b_ade5_3391_7639_f136f5c12a55">DHYAX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000046743Member"
      id="t_4_fbfafa84_c911_d5af_04cd_f17f6623e17c">This semi-annual shareholder report contains important information about BNY Mellon High Yield Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000046743Member"
      id="t_6_7559b1d6_8fab_6ef3_fb71_ed87fd36ff40">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000046743Member"
      id="t_5_79431361_6d37_16d0_084c_e390295456c3">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000046743Member"
      id="t_7_7e3ab74f_a506_a454_f118_46f65476d97d">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000046743Member"
      id="t_8_d74bda7d_72b7_c520_dc08_5b77f7b40ee0">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000046743Member"
      id="t_9_60ad748c_4c46_ab52_ff49_0446466418a0">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000046743Member"
      id="t_10_138d9b86_3272_23e6_b1d6_86d7ceca9fcb">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class A&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;53&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;1.07&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000046743Member"
      decimals="INF"
      id="h_26_328656c0_ab6a_4f72_8122_cc005e573316"
      unitRef="USD">53</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000046743Member"
      decimals="4"
      id="h_27_0b0b41eb_ccfa_401c_84e6_3293397bee61"
      unitRef="pure">0.0107</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000046743Member"
      id="t_11_8513dd06_14b5_6223_edc5_7619b8664d30">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;228&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;165&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000046743Member"
      decimals="INF"
      id="h_28_bac68831_fa96_4d51_8987_ed644e78b57b"
      unitRef="USD">228000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000046743Member"
      decimals="INF"
      id="h_29_13984eb1_f2e0_45e9_9195_ef81d4df934b"
      unitRef="Holding">165</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000046743Member"
      decimals="4"
      id="h_30_28f7f6bd_38ae_44c1_ad88_2aec0ba9be7a"
      unitRef="pure">0.0501</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000046743Member"
      id="t_12_1edc7545_7333_b169_e9ed_c5828bf69300">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673647.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673623.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000046744Member"
      id="t_1_6fd44b96_e56d_3e99_b970_332d8481d2fa">BNY Mellon High Yield Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000046744Member"
      id="t_2_f1bb48b1_9447_737d_5bae_61888ab78b6d">Class C</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000046744Member"
      id="t_3_9947928c_a886_9bcb_0c94_5c8efb00aff0">DHYCX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000046744Member"
      id="t_4_7f731d81_fd6d_0fdb_95b3_7d8dda417a24">This semi-annual shareholder report contains important information about BNY Mellon High Yield Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000046744Member"
      id="t_6_91bb56fa_d187_8c51_5a2a_afbe70860a18">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000046744Member"
      id="t_5_0fefa12c_42c5_46cf_9448_d89e95fd19ad">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000046744Member"
      id="t_7_45ae9073_1293_65fd_87de_515196ba996f">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000046744Member"
      id="t_8_70f5c260_e02a_85b7_a7bf_4fab6e3bf345">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000046744Member"
      id="t_9_7faf15c3_791d_db19_7c6f_d039a560a6f8">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000046744Member"
      id="t_10_a84b6ba4_c61d_325a_8f3d_a09404d55d4f">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class C&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;93&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;1.87&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000046744Member"
      decimals="INF"
      id="h_31_5d2812a8_36ce_4459_9e1f_a0019be03156"
      unitRef="USD">93</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000046744Member"
      decimals="4"
      id="h_32_1e8c468a_d539_472c_b3a3_656ff77b6500"
      unitRef="pure">0.0187</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000046744Member"
      id="t_11_ef1359a1_4730_01af_63e3_d0cd014797d9">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;228&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;165&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000046744Member"
      decimals="INF"
      id="h_33_7a9a9e7b_7d51_4eb9_ad11_10c8dc030c9b"
      unitRef="USD">228000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000046744Member"
      decimals="INF"
      id="h_34_eb7394c3_84d8_4fc1_88a4_ff1c76b1a923"
      unitRef="Holding">165</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000046744Member"
      decimals="4"
      id="h_35_e611dadc_29d1_4d35_ace3_42e069eaae81"
      unitRef="pure">0.0501</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000046744Member"
      id="t_12_147078a3_529a_41b4_6735_9c124b9fecca">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673697.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673673.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000073399Member"
      id="t_1_c1e729b9_1698_121a_cbd5_bdb875d1bbfc">BNY Mellon High Yield Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000073399Member"
      id="t_2_d5a1f32a_7bdc_8c47_6641_3f892ea66d5c">Class I</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000073399Member"
      id="t_3_6522b5b4_0906_cb83_dcfd_49871f7856d2">DYBIX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000073399Member"
      id="t_4_0447314c_e534_a5e7_c4fa_8ca4b9a82262">This semi-annual shareholder report contains important information about BNY Mellon High Yield Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000073399Member"
      id="t_5_4c5bfd6e_40fc_d740_0205_2c8893869061">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000073399Member"
      id="t_6_3e97870c_70be_1a6f_d59a_bd725267f379">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000073399Member"
      id="t_7_9f423f83_a165_4448_a037_6c06199869a7">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000073399Member"
      id="t_8_4b6c34c0_ab51_0288_b45c_2d12b68c80df">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000073399Member"
      id="t_9_6e09abba_9b69_64ed_f1f5_1f3bb298ed88">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000073399Member"
      id="t_10_f4055388_634c_7219_5eb5_aff81ac28d55">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class I&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;42&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.84&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000073399Member"
      decimals="INF"
      id="h_36_708b3e53_2abb_41a1_b3aa_4a1ed8d23eda"
      unitRef="USD">42</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000073399Member"
      decimals="4"
      id="h_37_ee2090d6_cec4_4814_9cff_26d2ff990bce"
      unitRef="pure">0.0084</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000073399Member"
      id="t_11_00a600a4_9b51_7d2b_8206_7cc9fbd9767b">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;228&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;165&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000073399Member"
      decimals="INF"
      id="h_38_d54fd082_4ba2_4f8c_af5d_b91c4ad95f3c"
      unitRef="USD">228000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000073399Member"
      decimals="INF"
      id="h_39_17ef1410_e9e2_4576_a66f_711c9fb251fc"
      unitRef="Holding">165</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000073399Member"
      decimals="4"
      id="h_40_e4083a4b_031e_4151_ae89_9bc877c314f2"
      unitRef="pure">0.0501</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000073399Member"
      id="t_12_3eda44df_e164_94b7_f642_ae10d7c27445">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673747.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673723.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000130453Member"
      id="t_1_1f106220_38e1_9cf8_ad0c_2eee137eb7f8">BNY Mellon High Yield Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000130453Member"
      id="t_2_82e1a6d4_2924_b264_31d6_cccad1c39bdc">Class Y</oef:ClassName>
    <dei:TradingSymbol
      contextRef="D20240829_20250228_C000130453Member"
      id="t_3_6916de8e_a47b_a00b_5b83_9fc6a31ab087">DHYYX</dei:TradingSymbol>
    <oef:AnnlOrSemiAnnlStatementTextBlock
      contextRef="D20240829_20250228_C000130453Member"
      id="t_5_c1f9997d_075b_cc1e_757a_b19fd1139b1f">This semi-annual shareholder report contains important information about BNY Mellon High Yield Municipal Bond Fund (the &#x201c;Fund&#x201d;) for the period of September 1, 2024 to February 28, 2025.</oef:AnnlOrSemiAnnlStatementTextBlock>
    <oef:ShareholderReportAnnualOrSemiAnnual
      contextRef="D20240829_20250228_C000130453Member"
      id="t_4_be4ed38a_5a17_0a45_94e8_5d585f8fea3e">semi-annual shareholder report</oef:ShareholderReportAnnualOrSemiAnnual>
    <oef:AddlInfoTextBlock
      contextRef="D20240829_20250228_C000130453Member"
      id="t_6_004d3ebf_78c5_05e6_c19f_00575be70700">You can find additional information about the Fund at &lt;span style="color:rgb(0, 0, 0);text-decoration-line:none;font-family:'times new roman';font-size:10pt;line-height:11pt"&gt;bny.com/investments/literaturecenter&lt;/span&gt;. You can also request this information by calling 1-800-373-9387 (inside the U.S. only) or by sending an e-mail request to info@bny.com.</oef:AddlInfoTextBlock>
    <oef:AddlInfoWebsite
      contextRef="D20240829_20250228_C000130453Member"
      id="t_8_cbb57783_bdbd_fef2_d451_186354d1e38a">bny.com/investments/literaturecenter</oef:AddlInfoWebsite>
    <oef:AddlInfoPhoneNumber
      contextRef="D20240829_20250228_C000130453Member"
      id="t_7_b1634438_426a_3083_89fb_d0f371e57c71">1-800-373-9387</oef:AddlInfoPhoneNumber>
    <oef:AddlInfoEmail
      contextRef="D20240829_20250228_C000130453Member"
      id="t_9_aad6ed2d_fc39_41c6_2718_20bf444f3837">info@bny.com</oef:AddlInfoEmail>
    <oef:ExpensesTextBlock
      contextRef="D20240829_20250228_C000130453Member"
      id="t_10_8948722b_cb8d_b3ea_42c0_ea78768230bb">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-bottom:2pt;"&gt; &lt;b&gt;What were the Fund&#x2019;s costs for the last &lt;/b&gt; &lt;b&gt;six months&lt;/b&gt; &lt;b&gt;?&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'times new roman';color:rgb(0, 0, 0);font-size:10pt;line-height:11pt;margin-bottom:3pt;"&gt;(based on a hypothetical $10,000 investment)&lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class Y&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;41&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.82&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 5pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; width: 10pt; text-align: left; vertical-align: super;"&gt;*&lt;/td&gt;
&lt;td style="break-inside: avoid-page; text-align: right; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: normal; padding-top: 0; padding-right: 0; padding-bottom: 0; padding-left: 0; vertical-align: top;"&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
    <oef:ExpensesPaidAmt
      contextRef="D20240829_20250228_C000130453Member"
      decimals="INF"
      id="h_41_b00caa71_e465_4766_8e88_79a04772b31f"
      unitRef="USD">41</oef:ExpensesPaidAmt>
    <oef:ExpenseRatioPct
      contextRef="D20240829_20250228_C000130453Member"
      decimals="4"
      id="h_42_b5b2cd06_debe_41cf_8511_b59a0d73d29c"
      unitRef="pure">0.0082</oef:ExpenseRatioPct>
    <oef:AddlFundStatisticsTextBlock
      contextRef="D20240829_20250228_C000130453Member"
      id="t_11_2a408547_2a05_ec9a_42ad_9c9d70b26864">&lt;div style="font-family:'cambria';color:rgb(0, 0, 0);font-size:11pt;font-weight:bold;margin-top:0px;margin-bottom:0px;"&gt; &lt;b&gt;KEY FUND STATISTICS (AS OF &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page"&gt;
&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Number of Holdings&lt;/td&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
&lt;tr style="border-bottom-width:initial;border-bottom-style:none;break-inside:avoid-page;border-bottom-color:initial;background-color:rgb(227, 235, 237);height:19pt"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;228&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;165&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;5.01&lt;span&gt;%&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
</oef:AddlFundStatisticsTextBlock>
    <us-gaap:AssetsNet
      contextRef="TI20250228_C000130453Member"
      decimals="INF"
      id="h_43_b2fcedf5_ba73_46fd_947e_e5f985d70301"
      unitRef="USD">228000000</us-gaap:AssetsNet>
    <oef:HoldingsCount
      contextRef="TI20250228_C000130453Member"
      decimals="INF"
      id="h_44_be4024f5_419c_4362_9197_538f09e882cc"
      unitRef="Holding">165</oef:HoldingsCount>
    <us-gaap:InvestmentCompanyPortfolioTurnover
      contextRef="D20240829_20250228_C000130453Member"
      decimals="4"
      id="h_45_599bde17_620f_4a8e_8d1f_02ebf896911b"
      unitRef="pure">0.0501</us-gaap:InvestmentCompanyPortfolioTurnover>
    <oef:HoldingsTableTextBlock
      contextRef="D20240829_20250228_C000130453Member"
      id="t_12_75158ac5_1f0e_60ab_2f81_d815227c3ed0">&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;text-transform:uppercase;font-size:9pt;margin-bottom:3pt;font-weight:bold;"&gt; &lt;b&gt;Portfolio Holdings (as of &lt;/b&gt; &lt;b&gt;2/28/25&lt;/b&gt; &lt;b&gt;)&lt;/b&gt; &lt;/div&gt;&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;"&gt; &lt;b&gt;Sector Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:12pt;"&gt; &lt;img alt="Graphical Representation - Top N Holdings Chart" src="chartimages_9673797.jpg" style="margin-left: 50pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
&lt;tr style="vertical-align: top"&gt;
&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;/table&gt;
&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673773.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;</oef:HoldingsTableTextBlock>
    <oef:FundName
      contextRef="D20240829_20250228_C000007813Member"
      id="t_1_6573e548_0c63_373e_95c4_fc126fbca2b7">BNY Mellon High Yield Municipal Bond Fund</oef:FundName>
    <oef:ClassName
      contextRef="D20240829_20250228_C000007813Member"
      id="t_2_a7bc4637_b7d9_6e42_496f_83a39cbdc296">Class Z</oef:ClassName>
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&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: left; width: 25%;"&gt;Share Class&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 30%;"&gt;Costs of a $10,000 investment&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 10pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; vertical-align: top; text-align: center; width: 40%;"&gt;Costs paid as a percentage of a $10,000 investment&lt;/td&gt; &lt;/tr&gt;
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&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 6pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: left; vertical-align: top; text-indent: -6pt;"&gt;Class Z&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;47&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; white-space: nowrap; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; text-align: center; vertical-align: top;"&gt;0.95&lt;span&gt;%&lt;/span&gt;&lt;span&gt;*&lt;/span&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;&lt;table style="width:100%;border-collapse:collapse;break-inside:avoid-page;margin-bottom:22pt"&gt;
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&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);font-size:9pt;line-height:normal;padding-top:0px;padding-right:0px;padding-bottom:0px;padding-left:0px;text-align:left;margin-bottom:0px;"&gt;Annualized.&lt;/div&gt;&lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</oef:ExpensesTextBlock>
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&lt;tr style="break-after:avoid;border-bottom-style:none;border-bottom-width:initial;break-inside:avoid-page;background-color:rgb(0, 72, 94);height:auto;border-bottom-color:initial"&gt;
&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Fund Size (Millions)&lt;/td&gt;
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&lt;td style="break-inside: avoid-page; font-family: 'Cambria'; color: rgb(255, 255, 255); font-size: 9pt; line-height: 9pt; font-weight: bold; padding-top: 1pt; padding-bottom: 10pt; padding-left: 3pt; padding-right: 3pt; text-align: center; width: 170pt; vertical-align: top;"&gt;&lt;br/&gt; Portfolio Turnover&lt;/td&gt; &lt;/tr&gt;
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&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;&lt;span style="float:none"&gt;$&lt;/span&gt;228&lt;/td&gt;
&lt;td style="break-inside: avoid-page; padding-top: 1pt; padding-right: 3pt; padding-bottom: 3pt; padding-left: 3pt; font-family: 'Cambria'; color: rgb(0, 0, 0); font-size: 9pt; line-height: 9pt; vertical-align: top; border-left-color: initial; border-left-style: none; border-left-width: initial; text-align: center; width: 170pt; font-weight: normal;"&gt;165&lt;/td&gt;
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&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
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&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
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&lt;div style="margin-top:0px;font-family:'cambria';color:rgb(0, 0, 0);letter-spacing:0px;font-size:9pt;font-weight:bold;margin-bottom:0px;text-transform:none;page-break-after:avoid;"&gt; &lt;b&gt;State Allocation (Based on Net Assets)&lt;/b&gt; &lt;/div&gt;&lt;div style="width:540pt;margin-left:18pt;margin-bottom:6pt;"&gt; &lt;img alt="Graphical Representation - Allocation 1 Chart" src="chartimages_9673823.jpg" style="margin-left: 29pt; width: 437pt;"/&gt;  &lt;/div&gt;&lt;table cellpadding="0" cellspacing="0" style="width: 60%; border-collapse: collapse"&gt;
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&lt;td style="width: 100%; border: Black 1pt solid; font: 11pt/107% Calibri, Helvetica, Sans-Serif; padding-right: 5.4pt; padding-bottom: 8pt; padding-left: 5.4pt; text-align: center"&gt;&lt;span style="font-family: Times New Roman, Times, Serif; font-size: 12pt; line-height: 107%"&gt;Not FDIC Insured. Not Bank-Guaranteed. May Lose Value &lt;/span&gt;&lt;/td&gt;&lt;/tr&gt;
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        <link:footnote id="f_0003_000002" xlink:label="f_0003_000002" xlink:role="http://www.xbrl.org/2003/role/footnote" xlink:type="resource" xml:lang="en-US">Annualized.</link:footnote>
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