Q: Can Macs read Windows documents?

most if not all formats are interchangeable, the common ones most defiantly are

If you could be more specific with respect to the document type we could tell you what apps open that document type.

Microsoft Office for Mac will work as will LibreOffice. I asked for specifics because if you were talking about some document like a Microsoft Publisher document it would be more complicated than installing Office for Mac.

The most common photo formats; PNG, JPG, JPG200 TIF, AIFF, RAW, etc are 100% interchangeable as well.

Applications like Photoshop, Illustrator, etc they can share native files between the OS's.