Well, I see that in the timing analyzer of arria 10 it is 900 mV for all cases.
So I guess this is the nominal voltage and that the doc should not mention low or high voltage in that case.
doc should just mention that there are different processes (slow/fast) and temp (and not mention voltage in the table).
Table2 explains the general interpretation of different operating conditions. It is not specifically for Arria devices.
I know it is general,
but my remark still applies,
the table shows different corners for process and temperature,
but not for voltage variation, as they are the same.