Anybody that has permission to view a Confluence page, can also export it as a ".doc" file, which can then be opened and edited in Microsoft Word.
Go to the page you want to export then click on the three dots in the page menu. Click "Export to Word." The file will then be downloaded and can be immediately opened and edited in Word.
Please watch our Video #27 of the Video Tutorial Series "Learn Atlassian Confluence". You can also read about this subject on this page in Atlassians documentation.