fix : Documentation for cdns/{{name}}/federations is missing a property  (#7112)

* Update cdns_name_federations.rst

* Update cdns_name_federations.rst

* Update cdns_name_federations.rst

* Update cdns_name_federations.rst

* Update CHANGELOG.md
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 150ff1f..b698374 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -20,6 +20,7 @@
 - [#7037](https://github.com/apache/trafficcontrol/pull/7037) *Traffic Router* Uses Traffic Ops API 4.0 by default
 
 ### Fixed
+- [#6947](https://github.com/apache/trafficcontrol/issues/6947) *Docs* Fixed docs for `cdns/{{name}}/federations` in APIv3, APIv4 and APIv5.
 - [#6903](https://github.com/apache/trafficcontrol/issues/6903), [#6903](https://github.com/apache/trafficcontrol/issues/6903) *Docs* Fixed docs for /cdns/dnsseckeys/refresh in APIv4 and APIv5.
 - [#7049](https://github.com/apache/trafficcontrol/issues/7049), [#7052](https://github.com/apache/trafficcontrol/issues/7052) *Traffic Portal* Fixed server table's quick search and filter option for multiple profiles.
 - [#7080](https://github.com/apache/trafficcontrol/issues/7080), [#6335](https://github.com/apache/trafficcontrol/issues/6335) *Traffic Portal* Fixed redirect links for server capability.
diff --git a/docs/source/api/v3/cdns_name_federations.rst b/docs/source/api/v3/cdns_name_federations.rst
index ef5b837..2167fcb 100644
--- a/docs/source/api/v3/cdns_name_federations.rst
+++ b/docs/source/api/v3/cdns_name_federations.rst
@@ -156,6 +156,7 @@
 
 Response Structure
 ------------------
+:id:          The integral, unique identifier of the :term:`Federation`
 :cname:       The Canonical Name (CNAME) used by the federation
 :description: An optionally-present field containing a description of the field
 
diff --git a/docs/source/api/v4/cdns_name_federations.rst b/docs/source/api/v4/cdns_name_federations.rst
index 9b5a8b8..00ac1e7 100644
--- a/docs/source/api/v4/cdns_name_federations.rst
+++ b/docs/source/api/v4/cdns_name_federations.rst
@@ -158,6 +158,7 @@
 
 Response Structure
 ------------------
+:id:          The intergral, unique identifier of the :term:`Federation`
 :cname:       The Canonical Name (CNAME) used by the federation
 :description: An optionally-present field containing a description of the field
 
diff --git a/docs/source/api/v5/cdns_name_federations.rst b/docs/source/api/v5/cdns_name_federations.rst
index 9bb5a00..e918808 100644
--- a/docs/source/api/v5/cdns_name_federations.rst
+++ b/docs/source/api/v5/cdns_name_federations.rst
@@ -158,6 +158,7 @@
 
 Response Structure
 ------------------
+:id:          The integral, unique identifier of the :term:`Federation`
 :cname:       The Canonical Name (CNAME) used by the federation
 :description: An optionally-present field containing a description of the field