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.

How To Automate a Table in Word Using Excel. As the world's leading business productivity suite, Microsoft Office provides many useful features including the ability to automatically display data ...

Paste Special can be used to paste Excel cells, tables, and worksheets into Word and PowerPoint while retaining Excel capabilities. To do so, copy the Excel cells, table, or worksheet.