Fortunately, there’s an easier solution: Modify the built-in table of contents styles. Word’s table of contents styles Word uses a dedicated set of styles to format a table of contents.

If you copy a table created in Excel 2010 and paste it in a Microsoft Word 2010 document, it will come with at least outside borders, if not all borders.

Learn how to Table within a Table within a table in Word and Google Sheets. You can put or insert a table into a table using these options.