3.25.1 html 344 26 1 true 44 0 false 6 false false R1.htm 030000 - Disclosure - Form N-CSR Cover Sheet http://xbrl.sec.gov/oef/role/NcsrCover Form N-CSR Cover Cover 1 false false R2.htm 030001 - Disclosure - Shareholder Report Sheet http://xbrl.sec.gov/oef/role/ShareholderReport Shareholder Report Notes 2 false false R3.htm 040020 - Disclosure - Shareholder Report, Holdings (Details) Sheet http://xbrl.sec.gov/oef/role/ShareholderReportHoldingsDetails Shareholder Report, Holdings (Details) Details 3 false false All Reports Book All Reports d940900dncsrs.htm eatonvance-20250331.xsd g940900i0564d08405f7898abe86.jpg g940900i0817c43c44dd60acf68b.jpg g940900i0af9cf7985f91ed5ed9f.jpg g940900i0b30925e4ae787a31791.jpg g940900i1181d6fce828ef1a4263.jpg g940900i18981c73989d2399a378.jpg g940900i1d91ec318e2cdd522cca.jpg g940900i2122c335460dcbcd7efd.jpg g940900i220c1f603d153414ce69.jpg g940900i23f27e69339cf80c3b44.jpg g940900i28dc733c340a69bcc4d5.jpg g940900i2de5310881ac57f3c147.jpg g940900i2edea48e02a135c10feb.jpg g940900i3661a4a1a0fa356effe1.jpg g940900i3df18b2f3d2d870d1aad.jpg g940900i3f1f4b862abc75eed38e.jpg g940900i4bab2b8ab6a78eb0c915.jpg g940900i4dbd23a03301ad52334c.jpg g940900i5df909f5932c384ad041.jpg g940900i5e6a435c1bfe8f92787b.jpg g940900i5ea0cb9e13f3d44fd96d.jpg g940900i5feb2873a55d0da500f9.jpg g940900i6493c76b0258448d21f2.jpg g940900i6a74e03e6c4dcc541b9b.jpg g940900i6fedc9461c70dc312443.jpg g940900i736b40c178bc9ba1b190.jpg g940900i74e3638ad89ba9de6034.jpg g940900i786e3552be0b193368e9.jpg g940900i799c8e2201e1e842547b.jpg g940900i7ed771055c907e9688a7.jpg g940900i80591d08319dae8f5f9e.jpg g940900i8952e96b8c7f9ae23205.jpg g940900i8ddadb3146dd376c97c8.jpg g940900ia3564ca13e11397171bc.jpg g940900iaa38b8be791280deecd3.jpg g940900iaaed3fae527e1eba5bdc.jpg g940900iaea001ab7389684933e7.jpg g940900ib0b93179c7482f84847a.jpg g940900ibc41c6d0477ef616ce63.jpg g940900ic124d9795b5875aaadfd.jpg g940900ic921474ec48e0751fb33.jpg g940900id8fb67bc747b7d544582.jpg g940900ida2501933a5c6c7b6f87.jpg g940900idf197bec9dff335c1ecb.jpg g940900ie15206d3cbe50a3f049e.jpg g940900ifc015fb42e3f1a58bbeb.jpg g940900img0bfc11451.gif g940900img0daac8491.gif g940900img1c4415192.gif g940900img5ea3418b1.gif g940900img621fc9481.gif g940900img80ffc5771.gif g940900img9cf6ce192.gif g940900imga19131c82.gif g940900imga86a42872.gif g940900imgb0d9ce9a1.gif g940900imgb962cf452.gif g940900imgfd8bde2f2.gif http://fasb.org/us-gaap/2024 http://xbrl.sec.gov/dei/2024 http://xbrl.sec.gov/oef/2024 false false