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
√
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
t
¯
t
FB
=
0.128
±
0.025
. The combined inclusive and differential asymmetries are consistent with recent standard model predictions.