Is there a word/phrase to describe the situation when a person doesn't work anymore, but they haven't retired yet? They may be still officially employed but with no actual responsibility, possibly too old and about to retire? Like a senior professor who is too old to lecture, holds no chair anymore, but is still officially employed at the academy?
Thank you all for the answers. On light duties and pre-retirement period are best for my context. I'm sure many will find the other ideas useful as well.