They do have debt now, they took out loans worth tens of billions in US and a few other countries in order to avoid bringing in money oversea. I believe they're at 40-50$ billions in debt now.
Yes, they have very low interest rates on these loans and probably can pay them all off once the oversea profits come into US at a loss of 40% tax but they're technically debts.
I don't think they keep the refrigerators. A couple of feed stores around here use containers for storage. Gotta be hotter than hell tossing 50lb bags of cattle feed in one of those things in middle of summer!