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Sorry if that wasn't clear; I use Google Docs. It has a word processor and spreadsheets and so on. They do work offline but not especially well, so the utility of it will depend whether or not you want to work on the train (for example).
For me personally it's great as I have 3 or 4 computers that I use for work depending on where I am and how lazy I feel. So if I want to sit in bed and work I can write on my laptop, but then when I go in to the office the next day and use my desktop computer it's all synced already.
I've been told it doesn't have all the features off Word etc. yet, but I only personally use it for basic stuff anyway; I use Python, LaTeX, whatever for proper writing and data processing. If you're already using LibreOffice on Linux I imagine you're in a similar situation to me.
I absolutely hate LibreOffice. Recommend Google Docs for cloudiness