diff --git a/README.md b/README.md
index c731e63..4e8de11 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,8 @@
 # ExAws IAM
 
-Easily interact with the AWS IAM API to work with users, access keys, and much more. This is an IAM service module for [ExAws](https://github.com/ex-aws/ex_aws).
+Easily interact with the AWS IAM API to work with users, access keys, and much more.
+
+This is an IAM service module for [ExAws](https://github.com/ex-aws/ex_aws).
 
 ```elixir
 user =
@@ -61,7 +63,7 @@ config :ex_aws,
 
 ## Usage
 
-The following operations are currently available.
+See the documentation for details. The following operations are currently available.
 
 ### User
 
diff --git a/lib/ex_aws/iam.ex b/lib/ex_aws/iam.ex
index 2e9086c..08cffaf 100644
--- a/lib/ex_aws/iam.ex
+++ b/lib/ex_aws/iam.ex
@@ -241,9 +241,27 @@ defmodule ExAws.Iam do
     |> to_op()
   end
 
-  def to_user({:ok, %{body: body}}), do: User.new(body)
+  @doc """
+  Converts a parsed IAM response into a `User` struct.
+
+  ## Parameters
+
+    * `resp` - The parsed response of an IAM API query request.
+
+  """
+  def to_user({:ok, %{body: body}}) do
+    User.new(body)
+  end
+
+  @doc """
+  Converts a parsed IAM response into an `AccessKey` struct.
 
-  def to_access_key({:ok, %{body: body}}), do: AccessKey.new(body)
+    * `resp` - The parsed response of an IAM API query request.
+
+  """
+  def to_access_key({:ok, %{body: body}}) do
+    AccessKey.new(body)
+  end
 
   defp to_params(action, opts, args \\ []) do
     @shared_opts
diff --git a/lib/ex_aws/iam/access_key.ex b/lib/ex_aws/iam/access_key.ex
index 34b1d73..768afcc 100644
--- a/lib/ex_aws/iam/access_key.ex
+++ b/lib/ex_aws/iam/access_key.ex
@@ -29,6 +29,10 @@ defmodule ExAws.Iam.AccessKey do
           username: String.t()
         }
 
+  @doc """
+  Returns a struct representation of an IAM AccessKey.
+
+  """
   def new(%{list_access_keys_result: %{access_key_metadata: access_keys}}) do
     Enum.map(access_keys, fn key ->
       access_key_to_struct(key)
diff --git a/lib/ex_aws/iam/parsers/access_key.ex b/lib/ex_aws/iam/parsers/access_key.ex
index 12aa75a..8403554 100644
--- a/lib/ex_aws/iam/parsers/access_key.ex
+++ b/lib/ex_aws/iam/parsers/access_key.ex
@@ -1,10 +1,13 @@
 defmodule ExAws.Iam.Parsers.AccessKey do
-  @moduledoc false
+  @moduledoc """
+  Defines parsers for handling AWS IAM access key query reponses.
+
+  """
 
   import SweetXml, only: [sigil_x: 2]
 
   @doc """
-  Parses XML from IAM API query responses.
+  Parses XML from IAM API access key query responses.
 
   """
   def parse(xml, "ListAccessKeys") do
diff --git a/lib/ex_aws/iam/parsers/user.ex b/lib/ex_aws/iam/parsers/user.ex
index ee9c18a..69f9182 100644
--- a/lib/ex_aws/iam/parsers/user.ex
+++ b/lib/ex_aws/iam/parsers/user.ex
@@ -1,8 +1,15 @@
 defmodule ExAws.Iam.Parsers.User do
-  @moduledoc false
+  @moduledoc """
+  Defines parsers for handling AWS IAM user query reponses.
+
+  """
 
   import SweetXml, only: [sigil_x: 2]
 
+  @doc """
+  Parses XML from IAM API user query responses.
+
+  """
   def parse(xml, "ListUsers") do
     SweetXml.xpath(xml, ~x"//ListUsersResponse",
       list_users_result: [
diff --git a/lib/ex_aws/iam/user.ex b/lib/ex_aws/iam/user.ex
index d376613..a89ede4 100644
--- a/lib/ex_aws/iam/user.ex
+++ b/lib/ex_aws/iam/user.ex
@@ -21,6 +21,10 @@ defmodule ExAws.Iam.User do
           username: String.t()
         }
 
+  @doc """
+  Returns a struct representation of an IAM User.
+
+  """
   def new(%{get_user_result: %{user: user}}), do: to_struct(user)
 
   def new(%{create_user_result: %{user: user}}), do: to_struct(user)