It would be based off the example noted on page 1
As an example, the input logic levels may be 0 and 1.8V, the control logic may be powered by
+5.0 and -5.0V, and the output L and H levels may be varied anywhere over the range of -5.0 to +5.0V.
Your output High min would be Vss +2 and Max of Vdd
Your output Low min would be Vss and a Max of Vdd-4.0
These values are subject to the input values given. Absolute max is listed on the top of page 2. I believe the timing diagram would be using the 10V Vdd and 0V Vss as stated in the DC Electrical Characteristics on the bottom half of page 2.