So, um, I googled this and found no easy instructions for installing LibreOffice. The only instructions I found looked arduous. I don’t like 37-command-line-commands to get a popular program installed. So, I took a guess and it worked:
sudo yum install libreoffice
Say yes, wait a few minutes, then bam, it’s installed and I’m using it. Works in Fedora 20 Xfce at least, and almost certainly the other spins as well.