If you create almost any type of doc outside of WordPress here’s how you can use that content to make a web page for your web site.
While I show how to copy and paste a Google Doc, Spreadsheet and web page you’re not limited to those formats. MS Office, Mac Work and most other similar text-based apps work the same way as I demonstrate.
Note: Any special styling you have in the original doc will most likely not be carried over to WordPress. All of that depends on your theme.