diff --git a/src/Symfony/Component/Intl/Collator/Collator.php b/src/Symfony/Component/Intl/Collator/Collator.php
index 62b1ddc995..a87e0eb228 100644
--- a/src/Symfony/Component/Intl/Collator/Collator.php
+++ b/src/Symfony/Component/Intl/Collator/Collator.php
@@ -70,7 +70,7 @@ class Collator
     const SORT_STRING = 1;
 
     /**
-     * @param string $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      *
      * @throws MethodArgumentValueNotImplementedException When $locale different than "en" or null is passed
      */
@@ -84,7 +84,7 @@ class Collator
     /**
      * Static constructor.
      *
-     * @param string $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null $locale The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      *
      * @return self
      *
diff --git a/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php b/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
index 13854ff719..6edae72fc3 100644
--- a/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
+++ b/src/Symfony/Component/Intl/DateFormatter/DateFormat/FullTransformer.php
@@ -69,16 +69,6 @@ class FullTransformer
         ];
     }
 
-    /**
-     * Return the array of Transformer objects.
-     *
-     * @return Transformer[] Associative array of Transformer objects (format char => Transformer)
-     */
-    public function getTransformers()
-    {
-        return $this->transformers;
-    }
-
     /**
      * Format a DateTime using ICU dateformat pattern.
      *
@@ -105,7 +95,7 @@ class FullTransformer
      *
      * @throws NotImplementedException When it encounters a not implemented date character
      */
-    public function formatReplace($dateChars, $dateTime)
+    private function formatReplace($dateChars, \DateTime $dateTime)
     {
         $length = \strlen($dateChars);
 
@@ -172,7 +162,7 @@ class FullTransformer
      * @return string The reverse matching regular expression with named captures being formed by the
      *                transformer index in the $transformer array
      */
-    public function getReverseMatchingRegExp($pattern)
+    private function getReverseMatchingRegExp($pattern)
     {
         $escapedPattern = preg_quote($pattern, '/');
 
@@ -189,9 +179,8 @@ class FullTransformer
                 return $this->replaceQuoteMatch($dateChars);
             }
 
-            $transformers = $this->getTransformers();
-            if (isset($transformers[$transformerIndex])) {
-                $transformer = $transformers[$transformerIndex];
+            if (isset($this->transformers[$transformerIndex])) {
+                $transformer = $this->transformers[$transformerIndex];
                 $captureName = str_repeat($transformerIndex, $length);
 
                 return "(?P<$captureName>".$transformer->getReverseMatchingRegExp($length).')';
@@ -208,7 +197,7 @@ class FullTransformer
      *
      * @return bool true if matches, false otherwise
      */
-    public function isQuoteMatch($quoteMatch)
+    private function isQuoteMatch($quoteMatch)
     {
         return "'" === $quoteMatch[0];
     }
@@ -220,7 +209,7 @@ class FullTransformer
      *
      * @return string A string with the single quotes replaced
      */
-    public function replaceQuoteMatch($quoteMatch)
+    private function replaceQuoteMatch($quoteMatch)
     {
         if (preg_match("/^'+$/", $quoteMatch)) {
             return str_replace("''", "'", $quoteMatch);
@@ -236,7 +225,7 @@ class FullTransformer
      *
      * @return string The chars match regular expression
      */
-    protected function buildCharsMatch($specialChars)
+    private function buildCharsMatch($specialChars)
     {
         $specialCharsArray = str_split($specialChars);
 
@@ -253,7 +242,7 @@ class FullTransformer
      *
      * @return array
      */
-    protected function normalizeArray(array $data)
+    private function normalizeArray(array $data)
     {
         $ret = [];
 
@@ -280,7 +269,7 @@ class FullTransformer
      *
      * @return bool|int The calculated timestamp or false if matched date is invalid
      */
-    protected function calculateUnixTimestamp(\DateTime $dateTime, array $options)
+    private function calculateUnixTimestamp(\DateTime $dateTime, array $options)
     {
         $options = $this->getDefaultValueForOptions($options);
 
diff --git a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
index 197a2e3db0..c5e60aee63 100644
--- a/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
+++ b/src/Symfony/Component/Intl/DateFormatter/IntlDateFormatter.php
@@ -118,7 +118,7 @@ class IntlDateFormatter
     private $timeZoneId;
 
     /**
-     * @param string                                  $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null                             $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      * @param int|null                                $datetype Type of date formatting, one of the format type constants
      * @param int|null                                $timetype Type of time formatting, one of the format type constants
      * @param \IntlTimeZone|\DateTimeZone|string|null $timezone Timezone identifier
@@ -152,7 +152,7 @@ class IntlDateFormatter
     /**
      * Static constructor.
      *
-     * @param string                                  $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param string|null                             $locale   The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
      * @param int|null                                $datetype Type of date formatting, one of the format type constants
      * @param int|null                                $timetype Type of time formatting, one of the format type constants
      * @param \IntlTimeZone|\DateTimeZone|string|null $timezone Timezone identifier
diff --git a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
index 9ba821eac8..5c31bdf554 100644
--- a/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
+++ b/src/Symfony/Component/Intl/NumberFormatter/NumberFormatter.php
@@ -241,13 +241,13 @@ class NumberFormatter
     ];
 
     /**
-     * @param string $locale  The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
-     * @param int    $style   Style of the formatting, one of the format style constants.
-     *                        The only supported styles are NumberFormatter::DECIMAL
-     *                        and NumberFormatter::CURRENCY.
-     * @param string $pattern Not supported. A pattern string in case $style is NumberFormat::PATTERN_DECIMAL or
-     *                        NumberFormat::PATTERN_RULEBASED. It must conform to  the syntax
-     *                        described in the ICU DecimalFormat or ICU RuleBasedNumberFormat documentation
+     * @param string|null $locale  The locale code. The only currently supported locale is "en" (or null using the default locale, i.e. "en")
+     * @param int         $style   Style of the formatting, one of the format style constants.
+     *                             The only supported styles are NumberFormatter::DECIMAL
+     *                             and NumberFormatter::CURRENCY.
+     * @param string      $pattern Not supported. A pattern string in case $style is NumberFormat::PATTERN_DECIMAL or
+     *                             NumberFormat::PATTERN_RULEBASED. It must conform to  the syntax
+     *                             described in the ICU DecimalFormat or ICU RuleBasedNumberFormat documentation
      *
      * @see http://www.php.net/manual/en/numberformatter.create.php
      * @see http://www.icu-project.org/apiref/icu4c/classDecimalFormat.html#_details