Having trouble pasting content into the Wordpress post editor.

Hi All,
I have multiple clients with different themes and installs having issues pasting content from Word into the editor.
Even using the paste as text feature the font still does not hold the themes formatting. We get different font type and color then the settings we selected for the themes. Keep in mind that this is happening in several themes.

Are there instructions anywhere or something I can give them to help them with copy and paste issues?
They have a lot of content and do not want to retype it.

Thanks for all.