There is no "official rule" here. It depends on the job, the department, hourly vs. salaried, how far away, how hard its been for Disney to fill the job, if there's a specific skill set he has that is particularly sought-after, and on and on.
If your DH gets to a point where they're making him an offer, then part of that discussion will be relocation. Disney will likely tell him flat-out that it is (or isn't) included, but if they don't, or if it doesn't seem clear, that can certainly be part of the salary / hiring package. It's not like he's going to lose the offer if he asks.
I know people at Disney who had full relo packages, including scouting trips for homes and schools, movers, real estate liaisons, and temporary rentals while the transition was happening. I also know people at Disney who moved from three states away for management jobs who got no relo (or very limited help). It just depends.
On the plus side ... if you move for a job and the company doesn't pay for relocation, you can deduct those costs off your taxes, so keep track!
