how to get function/procedure name and type in a package

Is there any view that lists the name of function/procedure  AND IT'S TYPE 
(function or procedure) in a package? The following query only lists name, but 
I want the type too.

SQL> select distinct package_name, object_name from user_arguments where 
PACKAGE_NAME='ACH';

PACKAGE_NAME                   OBJECT_NAME
------------------------------ ------------------------------
ACH                            CHECKRELEASELIMITS
ACH                            DBREQUIRESAPPROVAL
ACH                            GETVALIDEFFECTIVEDATE
ACH                            ISDBEDITOR
ACH                            SETBALANCEDVALIDATOR
ACH                            GETDEFTEFFECTIVEDATE
ACH                            SETACHINCLUSIVELIMITCHECK

7 rows selected.

TIA.
Guang

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