If you think it shouldn't, explain why.
If yes, how deep should the guidelines be in your opinion? For example, indentation of code should be included?
I think a team (rather than a company) need to agree on a set of guidelines for reasonably consistent style. It makes it more straightforward for maintenance.
How deep? As shallow as you can agree on. The shorter and clearer it is the more likely it is that all the team members can agree to it and will abide by it.