Let's make it fair then. Since 2012, Disney Animation has released 4 films, same amount as Pixar (5 when including Dory). For Pixar, all four failed to reach a billion, while 2 reached a billion for Disney Animation.
Brave + Monsters University + Inside out+ The Good dinosaur = 2.47 Billion Worldwide
Wreck-it-Ralph + Frozen + Big Hero 6 + Zootopia = 3.41 Billion Worldwide.
Disney Animation has outgrossed Pixar by almost a billion dollars in the past 4 years. Point being, Pixar isn't really Disney's leader in animation, not anymore.