Box Office Mojo

Hello, I'm looking for accurate information about the film Gladiator (2000). Specifically, I'm interested in the film's total box office grosses. On the Gladiator page, there are three total gross listings: Domestic, International, and Worldwide. What is the difference between International and Worldwide?

On the Box Office Mojo FAQ, it says that Domestic refers to the US, Canada, and Puerto Rico, and International covers the rest of the world. If this is the case, the Worldwide gross should be simply a sum of Domestic and International, but this is not the case; the Worldwide gross is much higher than simply those two categories combined.

Any help would be appreciated!