Lump conversion to double with from double

Author: mborland

doc/modules/ROOT/pages/decimal32_t.adoc

@@ -117,13 +117,18 @@ explicit constexpr operator decimal128_t() const noexcept;
 
 == Operator Behavior
 
-=== Construction from binary floating-point type
+=== Construction to and from binary floating-point type
 
 [source, c++]
 ----
 // 3.2.2.2 Conversion from floating-point type
 template <typename Float>
 explicit BOOST_DECIMAL_CXX20_CONSTEXPR decimal32_t(Float val) noexcept;
+
+// 3.2.6 Conversion to floating-point type
+explicit BOOST_DECIMAL_CXX20_CONSTEXPR operator float() const noexcept;
+explicit BOOST_DECIMAL_CXX20_CONSTEXPR operator double() const noexcept;
+explicit BOOST_DECIMAL_CXX20_CONSTEXPR operator long double() const noexcept;
 ----
 
 See: xref:binary_floating_conversions.adoc[]