What refers to the way ideas and details are arranged in a piece of writing?

The way ideas and details are arranged in a piece of writing is called organization.

Here are some other terms that might be used to describe this concept:

* Structure

* Arrangement

* Flow

* Logical progression

* Unity

* Coherence

Good organization is essential for effective writing. It helps readers to follow the writer's thought process, understand the main points, and remember the information presented.