It must vary by customer, none of my emails about my Amazon orders EVER contain any information about the items ordered, they just have a status and the order number.
I once talked to their customer service to ask how to stop getting the emails since they're basically entirely useless and they told me there's no way to do that.
Not only that; it seems even your chosen language has an impact.
The mails from Amazon.de in German do not contain any information about ordered items. From the same Amazon.de, to the same mail address, but in Czech, they do.