All Android and iPhone device users can now edit docs with QuickOffice within Google Apps for Business2
"One of the easiest ways to share old files and collaborate with others is to convert them to Google Docs, Sheets and Slides. However, not everyone you work with has gone Google yet. So to help, Google Apps for Business can already edit Microsoft Office files using Quickoffice on an iPad, and starting today they can do the same on iPhone and Android devices. From Word to Excel to Powerpoint, you can make quick edits at the airport or from the back of a taxi and save and share everything in Google Drive."