I'm not sure if I understand the question but I'll give it a shot. The setting you are referring to is shown here in this document on page 158:
What this does when checked is allow the CAD to control the non-ACD line as well as the ACD line. The document states if the box is checked:
Select this check box to enable the display of
If you enable the display of non-ACD calls, then
both ACD and non-ACD calls appear in and can
be controlled through Agent Desktop and
CAD-BE. With multi-line settings enabled, an
agent’s phone supports one ACD line and up to
three non-ACD lines.
Agents and supervisors can perform all general
operations with the non-ACD calls (for example,
answering, transferring, and conferencing).
By default, non-ACD calls are not displayed.
NOTE: The Display Non-ACD Calls check
box must be selected to configure any
other non-ACD call settings.
Now in as far as your question is concerned this box has nothing at all to do with the historical reports. There are certain reports that will show both ACD and non-ACD calls and other reports that will only show the ACD calls. The graph below should help you determine this.
Hopefully this is helpful. If not, please clarify your question and I'll do my best to answer it.