In the first section labeled "Orders" select the option called "Download Order Report." You have a few options to customize your order report depending on date and report type. Populate the fields with whatever information you're hoping to see and submit the request. A download should begin nearly immediately under the "Your Reports" section just below. This is where Amazon archives all of your report requests so you can easily refer to it at a later point if you'd like. Once the file is ready, simply select it to download the .csv file which you can open in Excel or a free program like CSVed.
The detailed file contains a lot of information like order and shipment date, address it was shipped to, subtotal, shipping costs, etc... We can imagine this could be useful information if you have a small business and find yourself ordering a lot through Amazon and it's hard to keep track of it all. The only major thing we miss from this brand new feature is to see the title of the actual object we purchased as a column. We can only imagine that Amazon left this out intentionally and not as an oversight but for whatever reason that could be, maybe Amazon will come in later with an update that will allow it since we think it would greatly improve this feature's functionality.
But there is still a lot to enjoy with just this document. Total up the purchase amounts to see just how much you've bought from Amazon throughout the years. But remember, this document is only as old as the email address you created the account with. If you have multiple accounts under different email addresses you'll have to separately download the reports for each.