  The CDF and D0 experiments at the Fermilab Tevatron have measured the
asymmetry between yields of forward- and backward-produced top and antitop
quarks based on their rapidity difference and the asymmetry between their decay
leptons. These measurements use the full data sets collected in
proton-antiproton collisions at a center-of-mass energy of $\sqrt s =1.96$ TeV.
We report the results of combinations of the inclusive asymmetries and their
differential dependencies on relevant kinematic quantities. The combined
inclusive asymmetry is $A_{\mathrm{FB}}^{t\bar{t}} = 0.128 \pm 0.025$. The
combined inclusive and differential asymmetries are consistent with recent
standard model predictions.
