Joshua Sedler
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+   *
+   * @dataProvider provideCountSignificantDecimals
+   *
+   * @param int $expected
+   *   The expected number of significant decimals.
+   * @param int|float|string $number
+   *   The number to test the count on.
+   */
+  public function testCountSignificantDecimals($expected, $number) {
+    $this->assertEquals($expected, Number::countSignificantDecimals($number));
+  }
+
+  /**
+   * Provides data to self::testCountSignificantDecimals().
+   */
+  public static function provideCountSignificantDecimals() {
-  public static function provideCountSignificantDecimals() {
+  public static function provideCountSignificantDecimals(): array {
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+      [1234.1234567800000000000000001, 1234.12345678],
+      ['1234.1234567800000000000000001', '1234.1234567800000000000000001'],
+    ];
+  }
+
+  /**
+   * @covers ::countSignificantDecimals
+   *
+   * @dataProvider provideCountSignificantDecimals
+   *
+   * @param int $expected
+   *   The expected number of significant decimals.
+   * @param int|float|string $number
+   *   The number to test the count on.
+   */
+  public function testCountSignificantDecimals($expected, $number) {
-  public function testCountSignificantDecimals($expected, $number) {
+  public function testCountSignificantDecimals(int $expected, int|float|string $number): void {
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+   *
+   * @param int|float|string $number
+   *   The number to test the count on.
+   * @param int $expected
+   *   The expected number of significant decimals.
+   *
+   * @dataProvider providerNormalize
+   */
+  public function testNormalize($number, $expected) {
+    $this->assertEquals($expected, Number::normalize($number));
+  }
+
+  /**
+   * Provides data to self::testNormalize().
+   */
+  public static function providerNormalize() {
-  public static function providerNormalize() {
+  public static function providerNormalize(): array {
--- a/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
+++ b/core/tests/Drupal/Tests/Component/Utility/NumberTest.php
    $this->assertEquals($expected, $return);
  }

+  /**
+   * @covers \Drupal\Component\Utility\Number::normalize
+   *
+   * @param int|float|string $number
+   *   The number to test the count on.
+   * @param int $expected
+   *   The expected number of significant decimals.
+   *
+   * @dataProvider providerNormalize
+   */
+  public function testNormalize($number, $expected) {
-  public function testNormalize($number, $expected) {
+  public function testNormalize(int|float|string $number, int $expected): void {
--- a/core/modules/field/field.install
+++ b/core/modules/field/field.install
 function field_update_last_removed() {
  return 8500;
 }
+
+/**
+ * Update existing DecimalItem fields to match the new maximum value.
+ */
+function field_update_10001() {
-function field_update_10001() {
+function field_update_10001(): void {
--- a/core/modules/field/field.install
+++ b/core/modules/field/field.install
+
+/**
+ * Update existing DecimalItem fields to match the new maximum value.
+ */
+function field_update_10001(): void {
+
+  // Load all decimal field storage entities:
+  $decimalFieldStorageEntities = \Drupal::entityTypeManager()->getStorage('field_storage_config')->loadByProperties([
+    'type' => 'decimal',
+  ]);
+
+  foreach ($decimalFieldStorageEntities as $decimalFieldStorageEntity) {
+    /** @var \Drupal\field\Entity\FieldStorageConfig $decimalFieldStorageEntity*/
+
+    $precision = (int) ini_get('precision');
+    $precisionMax = max($precision, 10);
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
      '#type' => 'number',
      '#title' => $this->t('Precision'),
      '#min' => 10,
-      '#max' => 32,
+      '#max' => max((int) ini_get('precision'), 10),
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldType/DecimalItem.php
      '#type' => 'number',
      '#title' => $this->t('Scale', [], ['context' => 'decimal places']),
      '#min' => 0,
-      '#max' => 10,
+      '#max' => max((int) ini_get('precision'), 10),