Welcome to the forum, Andie

There is indeed. I deal with old long documents regularly, with no clue what their history is, so I've developed a 'nuclear' process for peace of mind, consistent quality and lots of time saving. The bones:

1. A template for the new setup.
2. 'Tagging' in old doc to identify any formatting I want to keep.
3. Save old doc as plain text TXT—UTF-8 if asked.
4. Open new DocX based on template.
5. Open old doc in text editor, copy-paste into new DocX.
6. Format.

I have almost all the above in macros, so it's quick and painless. If it's not worth your while to automate—eg you don't see yourself doing this kind of project again—then the worst your faced with is a bunch of Global Replace operations.