I've written one of these 204-page PDFs before (I think it was more like 20 pages though). The IDPs don't exactly make it easy on their customers to set this stuff up, and the burden ends up on the SP (i.e. you) to document to folks how to use their own IDP.

Incidentally we just shipped something for this. Rather than having to make a 204-page PDF, you can go into SSOReady, generate a setup URL, and give it to customers. Customers can visit that URL and they get a self-serve UI for configuring their SAML connection to your product.

https://ssoready.com/docs/idp-configuration/enabling-self-se...