Adobe InDesign does not have native support for Microsoft Word formats (.doc, .docx), however, it does support export to PDF format.
Once you have got the .pdf file it should be pretty easy to convert pdf to doc, just keep in mind that the that the quality will be lower than the original. Some users have also recommended to first export pdf to html, before importing that to Word. However, other users claim that this makes no difference.
Open INDD file Open DOC file