diff --git a/src/Plugin/Field/FieldFormatter/Base.php b/src/Plugin/Field/FieldFormatter/Base.php
index d457e31..eee9fb8 100644
--- a/src/Plugin/Field/FieldFormatter/Base.php
+++ b/src/Plugin/Field/FieldFormatter/Base.php
@@ -255,6 +255,14 @@ abstract class Base extends FormatterBase {
           $item->{$subfield} = $field_settings[$subfield][$item->{$subfield} ? 'on_label' : 'off_label'];
         }
 
+        if ($field_settings['storage'][$subfield]['type'] == 'text_long') {
+          $item->{$subfield} = array(
+            '#type' => 'processed_text',
+            '#text' => $item->{$subfield},
+            '#format' => $item->{$subfield . '_format'},
+          );
+        }
+
         // Empty string should already be converted into NULL.
         // @see Drupal\double_field\Plugin\Field\FieldWidget\DoubleField::massageFormValues()
         if ($item->{$subfield} === NULL) {
diff --git a/src/Plugin/Field/FieldType/DoubleField.php b/src/Plugin/Field/FieldType/DoubleField.php
index 43de602..5667c0f 100644
--- a/src/Plugin/Field/FieldType/DoubleField.php
+++ b/src/Plugin/Field/FieldType/DoubleField.php
@@ -376,6 +376,15 @@ class DoubleField extends FieldItemBase {
           $columns[$subfield]['size'] = 'big';
           break;
 
+        case 'text_long':
+          $columns[$subfield]['type'] = 'text';
+          $columns[$subfield]['size'] = 'big';
+          $columns[$subfield . '_format'] = [
+            'type' => 'varchar_ascii',
+            'length' => 255,
+          ];
+          break;
+
         case 'integer':
           $columns[$subfield]['type'] = 'int';
           $columns[$subfield]['size'] = 'normal';
@@ -431,7 +440,7 @@ class DoubleField extends FieldItemBase {
 
       $subfield_type = $settings['storage'][$subfield]['type'];
       // Typed data are slightly different from schema the definition.
-      if ($subfield_type == 'text' || $subfield_type == 'telephone') {
+      if ($subfield_type == 'text' || $subfield_type == 'telephone' || $subfield_type == 'text_long') {
         $subfield_type = 'string';
       }
       elseif ($subfield_type == 'numeric') {
@@ -440,6 +449,9 @@ class DoubleField extends FieldItemBase {
 
       $properties[$subfield] = DataDefinition::create($subfield_type)
         ->setLabel($subfield_types[$subfield_type]);
+
+      $properties[$subfield . '_format'] = DataDefinition::create('filter_format')
+        ->setLabel(t('Text format'));
     }
 
     return $properties;
@@ -579,6 +591,7 @@ class DoubleField extends FieldItemBase {
       'boolean' => t('Boolean'),
       'string' => t('Text'),
       'text' => t('Text (long)'),
+      'text_long' => t('Text (formatted, long)'),
       'integer' => t('Integer'),
       'float' => t('Float'),
       'numeric' => t('Decimal'),
diff --git a/src/Plugin/Field/FieldWidget/DoubleField.php b/src/Plugin/Field/FieldWidget/DoubleField.php
index 4c149f2..00fa370 100644
--- a/src/Plugin/Field/FieldWidget/DoubleField.php
+++ b/src/Plugin/Field/FieldWidget/DoubleField.php
@@ -332,6 +332,15 @@ class DoubleField extends WidgetBase {
           if ($settings[$subfield]['placeholder']) {
             $widget[$subfield]['#placeholder'] = $settings[$subfield]['placeholder'];
           }
+          if (!empty($settings[$subfield]['editor'])) {
+            $value_element = $widget[$subfield];
+            $widget[$subfield] = [];
+            $widget[$subfield]['#default_value'] = $value_element['#default_value'];
+            $widget[$subfield]['value'] = $value_element;
+            $widget[$subfield]['#type'] = 'text_format';
+            $widget[$subfield]['#format'] = isset($items[$delta]->{$subfield . '_format'}) ? $items[$delta]->{$subfield . '_format'} : NULL;
+            $widget[$subfield]['#base_type'] = 'textarea';
+          }
           break;
 
         case 'number':
@@ -384,7 +393,17 @@ class DoubleField extends WidgetBase {
 
     foreach ($values as $delta => $value) {
       foreach (['first', 'second'] as $subfield) {
-        if ($value[$subfield] === '') {
+        if (is_array($value[$subfield])) {
+          foreach ($value[$subfield] as $key => $field_value) {
+            if ($key == 'value') {
+              $values[$delta][$subfield] = $field_value;
+            }
+            else {
+              $values[$delta][$subfield . '_' . $key] = $field_value;
+            }
+          }
+        }
+        elseif ($value[$subfield] === '') {
           $values[$delta][$subfield] = NULL;
         }
         elseif ($value[$subfield] instanceof DrupalDateTime) {
@@ -446,6 +465,7 @@ class DoubleField extends WidgetBase {
         break;
 
       case 'text':
+      case 'text_long':
         $subwidgets['textarea'] = $this->t('Text area');
         break;
 
@@ -504,6 +524,11 @@ class DoubleField extends WidgetBase {
       if (!$settings[$subfield]['type']) {
         $settings[$subfield]['type'] = key($widget_types);
       }
+
+      if ($field_settings['storage'][$subfield]['type'] == 'text_long') {
+        $settings[$subfield]['type'] = 'textarea';
+        $settings[$subfield]['editor'] = TRUE;
+      }
     }
 
     return $settings;