Find the the customer details and id for the customers who had more than one policy.
SELECT T1.customer_details ,  T1.customer_id FROM Customers AS T1 JOIN Customer_Policies AS T2 ON T1.Customer_id  =  T2.Customer_id GROUP BY T1.customer_id HAVING count(*)  >  1
Birden fazla politikası olan müşteriler için müşteri ayrıntılarını ve kimliğini bulun.