That's an interesting idea, care to elaborate on the documentation a bit more?
I also list out who needs to be informed -- who to contact directly by phone, who to email.
It isn't intended to be a will - it is more a list of the little details of my life that are not part of our shared existence, that would probably be forgotten in the turmoil, so I thought of them ahead of time.
I look at it a few times a year and keep it up to date. And I hope it is a wasted effort.