I have Android Studio. Do I have to download IntelliJ IDEA separately?

I know what you're thinking: "NO!??" Please let me explain my question.

Last week, I downloaded Android Studio on a whim, which led me into studying Kotlin, during the course of which I came across IntelliJ IDEA as its own standalone application apart from Android Studio (which as far as I can tell was originally / is still a plugin?). I don't see a way to create a new Kotlin project in Android Studio without all the Android trimmings, as evidently you can in IntelliJ IDEA; and I didn't see a plugin in Android Studio that seemed to provide that functionality. However, I thought Android Studio was built on top of IntelliJ IDEA and installing both of these large applications seems a bit cumbersome, to be honest. Monkey Cool

So, having already downloaded and installed Android Studio, must I now also download and install Intellij IDEA in order to get away from the Android part (so that I can focus on just learning Kotlin for now)? Or is there a way to get a Kotlin-only project going in Android Studio?

Thanks for enduring my woefully inadequate question and overwrought explanation thereof?