diff --git a/clang-tools-extra/clangd/FindSymbols.cpp b/clang-tools-extra/clangd/FindSymbols.cpp
--- a/clang-tools-extra/clangd/FindSymbols.cpp
+++ b/clang-tools-extra/clangd/FindSymbols.cpp
@@ -172,6 +172,31 @@
 }
 
 namespace {
+
+std::string getSymbolDetail(ASTContext &Ctx, const NamedDecl &ND) {
+  PrintingPolicy P(Ctx.getPrintingPolicy());
+  P.SuppressScope = true;
+  P.SuppressUnwrittenScope = true;
+  P.AnonymousTagLocations = false;
+  P.PolishForDeclaration = true;
+  std::string Detail;
+  llvm::raw_string_ostream OS(Detail);
+  if (const auto *TP = ND.getDescribedTemplateParams()) {
+    TP->print(OS, Ctx, P);
+  }
+  if (const auto *VD = dyn_cast<ValueDecl>(&ND)) {
+    VD->getType().print(OS, P);
+  } else if (const auto *TD = dyn_cast<TagDecl>(&ND)) {
+    OS << TD->getKindName();
+  } else if (const auto *TD = dyn_cast<TypedefNameDecl>(&ND)) {
+    OS << "type alias";
+  } else if (const auto *CD = dyn_cast<ConceptDecl>(&ND)) {
+    CD->getTemplateParameters()->print(OS, Ctx, P);
+    OS << "concept";
+  }
+  return Detail;
+}
+
 llvm::Optional<DocumentSymbol> declToSym(ASTContext &Ctx, const NamedDecl &ND) {
   auto &SM = Ctx.getSourceManager();
 
@@ -193,6 +218,7 @@
   SI.deprecated = ND.isDeprecated();
   SI.range = Range{sourceLocToPosition(SM, SymbolRange->getBegin()),
                    sourceLocToPosition(SM, SymbolRange->getEnd())};
+  SI.detail = getSymbolDetail(Ctx, ND);
 
   SourceLocation NameLoc = ND.getLocation();
   SourceLocation FallbackNameLoc;
diff --git a/clang-tools-extra/clangd/test/symbols.test b/clang-tools-extra/clangd/test/symbols.test
--- a/clang-tools-extra/clangd/test/symbols.test
+++ b/clang-tools-extra/clangd/test/symbols.test
@@ -1,5 +1,5 @@
 # RUN: clangd --index-file=%S/Inputs/symbols.test.yaml -lit-test < %s | FileCheck %s
-{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{"workspace":{"symbol":{"symbolKind":{"valueSet": [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]}}}},"trace":"off"}}
+{"jsonrpc":"2.0","id":0,"method":"initialize","params":{"processId":123,"rootPath":"clangd","capabilities":{"textDocument":{"documentSymbol":{"hierarchicalDocumentSymbolSupport":true}},"workspace":{"symbol":{"symbolKind":{"valueSet": [1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26]}}}},"trace":"off"}}
 ---
 {"jsonrpc":"2.0","method":"textDocument/didOpen","params":{"textDocument":{"uri":"test:///main.cpp","languageId":"cpp","version":1,"text":"void foo(); int main() { foo(); }\n"}}}
 ---
@@ -34,40 +34,54 @@
 # CHECK-NEXT:  "jsonrpc": "2.0",
 # CHECK-NEXT:    "result": [
 # CHECK-NEXT:      {
-# CHECK-NEXT:        "containerName": "",
+# CHECK-NEXT:        "detail": "void ()",
 # CHECK-NEXT:        "kind": 12,
-# CHECK-NEXT:        "location": {
-# CHECK-NEXT:          "range": {
-# CHECK-NEXT:            "end": {
-# CHECK-NEXT:              "character": {{.*}},
-# CHECK-NEXT:              "line": {{.*}}
-# CHECK-NEXT:            },
-# CHECK-NEXT:            "start": {
-# CHECK-NEXT:              "character": {{.*}},
-# CHECK-NEXT:              "line": {{.*}}
-# CHECK-NEXT:            }
+# CHECK-NEXT:        "name": "foo",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
 # CHECK-NEXT:          },
-# CHECK-NEXT:          "uri": "file://{{.*}}/main.cpp"
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
+# CHECK-NEXT:          }
 # CHECK-NEXT:        },
-# CHECK-NEXT:        "name": "foo"
-# CHECK-NEXT:      }
+# CHECK-NEXT:        "selectionRange": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
+# CHECK-NEXT:      },
 # CHECK-NEXT:      {
-# CHECK-NEXT:        "containerName": "",
+# CHECK-NEXT:        "detail": "int ()",
 # CHECK-NEXT:        "kind": 12,
-# CHECK-NEXT:        "location": {
-# CHECK-NEXT:          "range": {
-# CHECK-NEXT:            "end": {
-# CHECK-NEXT:              "character": {{.*}},
-# CHECK-NEXT:              "line": {{.*}}
-# CHECK-NEXT:            },
-# CHECK-NEXT:            "start": {
-# CHECK-NEXT:              "character": {{.*}},
-# CHECK-NEXT:              "line": {{.*}}
-# CHECK-NEXT:            }
+# CHECK-NEXT:        "name": "main",
+# CHECK-NEXT:        "range": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
 # CHECK-NEXT:          },
-# CHECK-NEXT:          "uri": "file://{{.*}}/main.cpp"
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
+# CHECK-NEXT:          }
 # CHECK-NEXT:        },
-# CHECK-NEXT:        "name": "main"
+# CHECK-NEXT:        "selectionRange": {
+# CHECK-NEXT:          "end": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
+# CHECK-NEXT:          },
+# CHECK-NEXT:          "start": {
+# CHECK-NEXT:            "character": {{.*}},
+# CHECK-NEXT:            "line": {{.*}}
+# CHECK-NEXT:          }
+# CHECK-NEXT:        }
 # CHECK-NEXT:      }
 # CHECK-NEXT:    ]
 # CHECK-NEXT:}