"To the detriment of" refers to something that is harmful or negative to someone or something. There are a number of synonyms for this phrase that can be used in its place, depending on the intended meaning and context of the sentence. Some common alternatives include "at the expense of," "to the disadvantage of," "to the harm of," "to the injury of," and "to the disadvantage of." Each of these phrases indicates that someone or something is being harmed or negatively impacted by a particular action or situation. It's important to choose the right synonym for "to the detriment of" to accurately convey the intended meaning and tone of the sentence.