The animated movies in the Ice Age franchise have been successful in their own right, if not by core Disney animation standards.
The original Ice Age was released in 2002, with Ice Age: The Meltdown following in 2006, Ice Age: Dawn of the Dinosaurs releasing in 2009, Ice Age: Continental Drift in 2012, and Ice Age: Collision Course appearing in 2016.
A spin-off from that series, Ice Age: Adventures of Buck Wild will get an exclusive premier on Disney+.
Ice Age is the rare highly successful animation franchise within the Disney empire that is NOT a Disney or related animation film series.