Document all the parameters including cross references to specific providers where appropriate.
diff --git a/docs/hazmat/primitives/symmetric-encryption.rst b/docs/hazmat/primitives/symmetric-encryption.rst
index 76f68a1..f63ad90 100644
--- a/docs/hazmat/primitives/symmetric-encryption.rst
+++ b/docs/hazmat/primitives/symmetric-encryption.rst
@@ -44,8 +44,16 @@
>>> decryptor.update(ct) + decryptor.finalize()
'a secret message'
- :param algorithms: One of the algorithms described below.
- :param mode: One of the modes described below.
+ :param algorithms: A
+ :class:`~cryptography.hazmat.primitives.interfaces.CipherAlgorithm`
+ provider such as those described
+ :ref:`below <symmetric-encryption-algorithms>`.
+ :param mode: A :class:`~cryptography.hazmat.primitives.interfaces.Mode`
+ provider such as those described
+ :ref:`below <symmetric-encryption-modes>`.
+ :param backend: A
+ :class:`~cryptography.hazmat.bindings.interfaces.CipherBackend`
+ provider.
.. method:: encryptor()
@@ -98,6 +106,8 @@
:meth:`update` and :meth:`finalize` will raise
:class:`~cryptography.exceptions.AlreadyFinalized`.
+.. _symmetric-encryption-algorithms:
+
Algorithms
~~~~~~~~~~