Does compressing files into a zip file reduce the quality of the contents?

I know that this is probably a stupid question, but oh well. My question basically comes from a confusion between compressing music files and other digital files, such as word doents. I know that compressing music files into another format (such as changing an mp3 to a wav file) will cause a permanent change to the quality of the file, even if it is later turned back into a wav file. However, I don't know if this principle is the same for compressing other doents. If I put music files into a folder, for example, and then compress that folder into a zip file, will it permanently decrease the quality of the original files? Citing sources would be nice, but any help is appreciated.