When you debug the parent query you will get the id of the lookup only.

To get the vale of the child field you have to explicitly output it.

Region__r.Division__c

Another way is the getSObject method if you need the sObject

When you debug the parent query you will get the id of the lookup only.

To get the vale of the child field you have to explicitly output it.

Region__r.Division__c

Another way is the getSObject method if you need the sObject

Region__c tmp = (Region__c)accs.getSObject('Region__r');
System.debug(tmp.Division__c);

Note you can only get field explicitly in the query you created the SObject from