My Peace Lily is indoors for our short winter. I've kept it indoors all year l9ng before but it prefers to be outside. By March, it will be back where she belongs. For now she sits in front of a bright window.
One particularly cold winter in the garage nearly killed it. But it bounced back to what it is today. One big mistake, or doesn't bloom because the pot is to big. When bringing it back to life, I kept the original pot when I should have reduced the size. Still it is thriving in green.
I agree with Elaine. I would hold back on dividing. It seems to do better when crowded.