At the beginning of your presentation, don’t tell your audience: “Don’t bother to take notes. I’ll provide you with a detailed handout when I finish.” That suggests to your listeners that they don’t need to focus on what you are saying as you speak. Besides, if everything is written down for them, do you really need to present at all?
Better strategy: Provide them with a handout of the skeleton of your presentation and encourage them to take notes as they see fit. Or you make available through your website additional handouts and more in-depth material.