Auto Insurance Credit

When an auto insurance company looks into your credit what are they looking for?
When they look into your credit what are they looking for? Just your credit score? or can they see your whole report? Like your credit card debt?
Farmers does not see your report, we only get a letter rating. A-Z I and N being incomplete. We do not see anything on your credit report, we can only see why you got the rating you got, too many accounts open, late payments, or not enough credit history but we do not get any elaboration on any of the explanations.
