diff --git a/cpp/include/cudf/fixed_point/floating_conversion.hpp b/cpp/include/cudf/fixed_point/detail/floating_conversion.hpp
similarity index 99%
rename from cpp/include/cudf/fixed_point/floating_conversion.hpp
rename to cpp/include/cudf/fixed_point/detail/floating_conversion.hpp
index f0d50edccd1..fce08b4a5c4 100644
--- a/cpp/include/cudf/fixed_point/floating_conversion.hpp
+++ b/cpp/include/cudf/fixed_point/detail/floating_conversion.hpp
@@ -26,14 +26,6 @@
 #include <cstring>
 
 namespace CUDF_EXPORT numeric {
-
-/**
- * @addtogroup floating_conversion
- * @{
- * @file
- * @brief fixed_point <--> floating-point conversion functions.
- */
-
 namespace detail {
 
 /**
@@ -1141,6 +1133,4 @@ CUDF_HOST_DEVICE inline FloatingType convert_integral_to_floating(Rep const& val
 }
 
 }  // namespace detail
-
-/** @} */  // end of group
 }  // namespace CUDF_EXPORT numeric
diff --git a/cpp/include/cudf/unary.hpp b/cpp/include/cudf/unary.hpp
index 53e0f3a15d2..046e9745a71 100644
--- a/cpp/include/cudf/unary.hpp
+++ b/cpp/include/cudf/unary.hpp
@@ -16,8 +16,8 @@
 
 #pragma once
 
+#include <cudf/fixed_point/detail/floating_conversion.hpp>
 #include <cudf/fixed_point/fixed_point.hpp>
-#include <cudf/fixed_point/floating_conversion.hpp>
 #include <cudf/types.hpp>
 #include <cudf/utilities/default_stream.hpp>
 #include <cudf/utilities/export.hpp>
diff --git a/cpp/include/doxygen_groups.h b/cpp/include/doxygen_groups.h
index 5fffb343042..5f3e7efbbfe 100644
--- a/cpp/include/doxygen_groups.h
+++ b/cpp/include/doxygen_groups.h
@@ -48,9 +48,6 @@
  *      @defgroup scalar_factories Factories
  *   @}
  *   @defgroup fixed_point_classes Fixed Point
- *   @{
- *      @defgroup floating_conversion Float Conversion
- *   @}
  * @}
  * @defgroup column_apis Column and Table
  * @{