/usr/share/idl/ is in libbonobo2-common 2.32.1-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/idl/bonobo-2.0/
/usr/share/idl/bonobo-2.0/Bonobo_Zoomable.idl
/usr/share/idl/bonobo-2.0/Bonobo_Application.idl
/usr/share/idl/bonobo-2.0/Bonobo.idl
/usr/share/idl/bonobo-2.0/Bonobo_Property.idl
/usr/share/idl/bonobo-2.0/Bonobo_Control.idl
/usr/share/idl/bonobo-2.0/Bonobo_Sample_Echo.idl
/usr/share/idl/bonobo-2.0/Bonobo_Clipboard.idl
/usr/share/idl/bonobo-2.0/Bonobo_Embeddable.idl
/usr/share/idl/bonobo-2.0/Bonobo_Gdk.idl
/usr/share/idl/bonobo-2.0/Bonobo_Canvas.idl
/usr/share/idl/bonobo-2.0/Bonobo_Listener.idl
/usr/share/idl/bonobo-2.0/Bonobo_Storage.idl
/usr/share/idl/bonobo-2.0/Bonobo_Print.idl
/usr/share/idl/bonobo-2.0/Bonobo_Persist.idl
/usr/share/idl/bonobo-2.0/Bonobo_Moniker.idl
/usr/share/idl/bonobo-2.0/Bonobo_Context.idl
/usr/share/idl/bonobo-2.0/Bonobo_UI.idl
/usr/share/idl/bonobo-2.0/Bonobo_Exception.idl
/usr/share/idl/bonobo-2.0/Bonobo_ItemContainer.idl
/usr/share/idl/bonobo-activation-2.0/
/usr/share/idl/bonobo-activation-2.0/Bonobo_GenericFactory.idl
/usr/share/idl/bonobo-activation-2.0/Bonobo_ActivationContext.idl
/usr/share/idl/bonobo-activation-2.0/Bonobo_Activation_types.idl
/usr/share/idl/bonobo-activation-2.0/Bonobo_Unknown.idl
/usr/share/idl/bonobo-activation-2.0/Bonobo_ObjectDirectory.idl