Christopher Warnock of Renaissance Astrology
www.renaissanceastrology.com/
discusses the differing uses of the essential debility of detriment, a planet being in the sign opposite to the sign it rules, eg Venus in Scorpio, in both modern astrology and medieval/Renaissance astrology.
What does detriment mean in general, for all situations? NOTHING! Context is the key, the meaning depends on which school, modern or traditional, which type of delineation, natal or horary, and the specific context of each individual chart.
Realize that different perspectives are not only possible, but useful and necessary, know your own perspective and respect the perspectives of others!