Hi, I prefer to use MS Word.
Having composed my latest masterpiece I select the text, copy with ctrl-C and paste with ctrl-V into the listing editor.
When the listing editor responds and asks whether I want to clean it up (or something like that anyway) I click 'cancel'. That's right, 'cancel' strange idea of cancelling, not the usual implementation of a such a dialogue box button.
Cleaning removes most of the formatting and leaving a limp representation of what you started with.
However pasting in 'unclean' does make the HTML bulky, just look after you have pasted. If I was good at HTML I would avoid using MS Word completely (various reasons) but tough I am not.