Regarding critical damage with the revamp

When I read it, I thought it meant the "20% minimum something" to be the minimum amount of damage that the attack was increased by, but it could go higher.

For example, say you hit 1k damage and it crits. It would increase by at least 20% in damage, to 1.2k. But it could go higher.
Then again, this is based on translations, so I'm not the one to ask