diff --git a/google-api-client/pom.xml b/google-api-client/pom.xml
index c06f356f2..2232616d4 100644
--- a/google-api-client/pom.xml
+++ b/google-api-client/pom.xml
@@ -159,6 +159,11 @@
       <groupId>com.google.http-client</groupId>
       <artifactId>google-http-client</artifactId>
     </dependency>
+    <dependency>
+      <groupId>com.google.code.gson</groupId>
+      <artifactId>gson</artifactId>
+      <scope>test</scope>
+    </dependency>
     <dependency>
       <groupId>com.google.protobuf</groupId>
       <artifactId>protobuf-java</artifactId>
diff --git a/google-api-client/src/main/java/com/google/api/client/googleapis/json/GoogleJsonError.java b/google-api-client/src/main/java/com/google/api/client/googleapis/json/GoogleJsonError.java
index c0f0eb86b..dadd172fb 100644
--- a/google-api-client/src/main/java/com/google/api/client/googleapis/json/GoogleJsonError.java
+++ b/google-api-client/src/main/java/com/google/api/client/googleapis/json/GoogleJsonError.java
@@ -184,7 +184,7 @@ public ErrorInfo clone() {
     }
   }
 
-  public static class Details {
+  public static class Details extends GenericJson {
     @Key("@type")
     private String type;
 
diff --git a/google-api-client/src/test/java/com/google/api/client/googleapis/json/GoogleJsonErrorTest.java b/google-api-client/src/test/java/com/google/api/client/googleapis/json/GoogleJsonErrorTest.java
index c988804a6..380114aee 100644
--- a/google-api-client/src/test/java/com/google/api/client/googleapis/json/GoogleJsonErrorTest.java
+++ b/google-api-client/src/test/java/com/google/api/client/googleapis/json/GoogleJsonErrorTest.java
@@ -28,6 +28,7 @@
 import com.google.api.client.testing.http.MockLowLevelHttpRequest;
 import com.google.api.client.testing.http.MockLowLevelHttpResponse;
 import java.io.InputStream;
+import java.io.InputStreamReader;
 import junit.framework.TestCase;
 
 /**
@@ -37,6 +38,7 @@
  */
 public class GoogleJsonErrorTest extends TestCase {
 
+  public static final com.google.gson.JsonParser JSON_PARSER = new com.google.gson.JsonParser();
   static final JsonFactory FACTORY = new GsonFactory();
   static final String ERROR =
       "{"
@@ -93,6 +95,32 @@ public void testParse() throws Exception {
     assertEquals(ERROR, FACTORY.toString(errorResponse));
   }
 
+  public void testParse_withMultipleErrorTypesInDetails() throws Exception {
+    InputStream errorResponseStream =
+        GoogleJsonErrorTest.class.getResourceAsStream(
+            "errorResponseWithMultipleTypesInDetails.json");
+
+    InputStream expectedParsedErrorResponse =
+        GoogleJsonErrorTest.class.getResourceAsStream(
+            "expectedParsedErrorWithMultipleTypesInDetails.json");
+
+    HttpTransport transport =
+        new ErrorTransport(
+            new MockLowLevelHttpResponse()
+                .setContent(errorResponseStream)
+                .setContentType(Json.MEDIA_TYPE)
+                .setStatusCode(HttpStatusCodes.STATUS_CODE_FORBIDDEN));
+    HttpRequest request =
+        transport.createRequestFactory().buildGetRequest(HttpTesting.SIMPLE_GENERIC_URL);
+    request.setThrowExceptionOnExecuteError(false);
+    HttpResponse response = request.execute();
+    com.google.api.client.googleapis.json.GoogleJsonError actualParsedErrorResponse =
+        com.google.api.client.googleapis.json.GoogleJsonError.parse(FACTORY, response);
+    assertEquals(
+        JSON_PARSER.parse(new InputStreamReader(expectedParsedErrorResponse)),
+        JSON_PARSER.parse(FACTORY.toString(actualParsedErrorResponse)));
+  }
+
   public void testParse_withDetails() throws Exception {
     String DETAILS_ERROR =
         "{"
@@ -122,7 +150,8 @@ public void testParse_withDetails() throws Exception {
     com.google.api.client.googleapis.json.GoogleJsonError errorResponse =
         com.google.api.client.googleapis.json.GoogleJsonError.parse(FACTORY, response);
 
-    assertEquals(DETAILS_ERROR, FACTORY.toString(errorResponse));
+    assertEquals(
+        JSON_PARSER.parse(DETAILS_ERROR), JSON_PARSER.parse(FACTORY.toString(errorResponse)));
     assertNotNull(errorResponse.getDetails());
   }
 
@@ -166,7 +195,8 @@ public void testParse_withReasonInDetails() throws Exception {
     com.google.api.client.googleapis.json.GoogleJsonError errorResponse =
         com.google.api.client.googleapis.json.GoogleJsonError.parse(FACTORY, response);
 
-    assertEquals(DETAILS_ERROR, FACTORY.toString(errorResponse));
+    assertEquals(
+        JSON_PARSER.parse(DETAILS_ERROR), JSON_PARSER.parse(FACTORY.toString(errorResponse)));
     assertNotNull(errorResponse.getDetails().get(2).getReason());
   }
 }
diff --git a/google-api-client/src/test/resources/com/google/api/client/googleapis/json/errorResponseWithMultipleTypesInDetails.json b/google-api-client/src/test/resources/com/google/api/client/googleapis/json/errorResponseWithMultipleTypesInDetails.json
new file mode 100644
index 000000000..fc2826ac3
--- /dev/null
+++ b/google-api-client/src/test/resources/com/google/api/client/googleapis/json/errorResponseWithMultipleTypesInDetails.json
@@ -0,0 +1,65 @@
+{
+  "error": {
+    "code": 400,
+    "message": "The template parameters are invalid.",
+    "status": "INVALID_ARGUMENT",
+    "details": [
+      {
+        "@type": "type.googleapis.com/google.dataflow.v1beta3.InvalidTemplateParameters",
+        "reason": "TEST REASON 1",
+        "parameterViolations": [
+          {
+            "parameter": "safeBrowsingApiKey",
+            "description": "Parameter didn't match regex '^[0-9a-zA-Z_]+$'"
+          }
+        ]
+      },
+      {
+        "@type": "type.googleapis.com/google.rpc.DebugInfo",
+        "detail": "test detail"
+      },
+      {
+        "@type": "type.googleapis.com/google.rpc.DebugInfo",
+        "reason": "test reason 2"
+      },
+      {
+        "@type": "type.googleapis.com/google.rpc.BadRequest",
+        "fieldViolations": [
+          {
+            "field": "language_code",
+            "description": "Field is required"
+          }
+        ]
+      },
+      {
+        "@type": "type.googleapis.com/google.chrome.policy.v1.PolicyModificationErrorDetails",
+        "modificationErrors": [
+          {
+            "policyTargetKey": {
+              "targetResource": "orgunits/03ph8a2z19ryqq8"
+            },
+            "policySchema": "chrome.users.BrowserThemeColor",
+            "fieldErrors": [
+              {
+                "field": "browserThemeColor",
+                "error": "Field is an invalid hex color. Only the numbers 0-9 and letters A-F are permitted."
+              }
+            ]
+          }
+        ]
+      },
+      {
+        "@type": "type.googleapis.com/google.mybusiness.v4.ValidationError",
+        "errorDetails": [
+          {
+            "code": 3,
+            "field": "regular_hours.periods.close_time",
+            "message": "Time field must follow hh:mm format.",
+            "value": "25:00"
+          }
+        ]
+      }
+    ]
+  }
+}
+
diff --git a/google-api-client/src/test/resources/com/google/api/client/googleapis/json/expectedParsedErrorWithMultipleTypesInDetails.json b/google-api-client/src/test/resources/com/google/api/client/googleapis/json/expectedParsedErrorWithMultipleTypesInDetails.json
new file mode 100644
index 000000000..7cbf42e74
--- /dev/null
+++ b/google-api-client/src/test/resources/com/google/api/client/googleapis/json/expectedParsedErrorWithMultipleTypesInDetails.json
@@ -0,0 +1,63 @@
+{
+  "code": 400,
+  "message": "The template parameters are invalid.",
+  "status": "INVALID_ARGUMENT",
+  "details": [
+    {
+      "@type": "type.googleapis.com/google.dataflow.v1beta3.InvalidTemplateParameters",
+      "reason": "TEST REASON 1",
+      "parameterViolations": [
+        {
+          "parameter": "safeBrowsingApiKey",
+          "description": "Parameter didn't match regex '^[0-9a-zA-Z_]+$'"
+        }
+      ]
+    },
+    {
+      "@type": "type.googleapis.com/google.rpc.DebugInfo",
+      "detail": "test detail"
+    },
+    {
+      "@type": "type.googleapis.com/google.rpc.DebugInfo",
+      "reason": "test reason 2"
+    },
+    {
+      "@type": "type.googleapis.com/google.rpc.BadRequest",
+      "fieldViolations": [
+        {
+          "field": "language_code",
+          "description": "Field is required"
+        }
+      ]
+    },
+    {
+      "@type": "type.googleapis.com/google.chrome.policy.v1.PolicyModificationErrorDetails",
+      "modificationErrors": [
+        {
+          "policyTargetKey": {
+            "targetResource": "orgunits/03ph8a2z19ryqq8"
+          },
+          "policySchema": "chrome.users.BrowserThemeColor",
+          "fieldErrors": [
+            {
+              "field": "browserThemeColor",
+              "error": "Field is an invalid hex color. Only the numbers 0-9 and letters A-F are permitted."
+            }
+          ]
+        }
+      ]
+    },
+    {
+      "@type": "type.googleapis.com/google.mybusiness.v4.ValidationError",
+      "errorDetails": [
+        {
+          "code": 3,
+          "field": "regular_hours.periods.close_time",
+          "message": "Time field must follow hh:mm format.",
+          "value": "25:00"
+        }
+      ]
+    }
+  ]
+}
+
diff --git a/pom.xml b/pom.xml
index 69a910822..6a0f1b2b0 100644
--- a/pom.xml
+++ b/pom.xml
@@ -222,6 +222,12 @@
         <version>${project.protobuf-java.version}</version>
         <scope>test</scope>
       </dependency>
+      <dependency>
+        <groupId>com.google.code.gson</groupId>
+        <artifactId>gson</artifactId>
+        <version>${gson.version}</version>
+        <scope>test</scope>
+      </dependency>
     </dependencies>
   </dependencyManagement>
 
@@ -515,6 +521,7 @@
     <project.datanucleus-maven-plugin.version>4.0.3</project.datanucleus-maven-plugin.version>
     <project.servlet-api.version>2.5</project.servlet-api.version>
     <deploy.autorelease>false</deploy.autorelease>
+    <gson.version>2.10</gson.version>
   </properties>
 
   <profiles>