text: Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
  ### Context:
  CREATE TABLE Customer_Policies (customer_id VARCHAR); CREATE TABLE Customers (customer_details VARCHAR, customer_id VARCHAR); CREATE TABLE Customers (customer_details VARCHAR)
  ### Question:
  List the details of the customers who do not have any policies.
  ### Answer:
  SELECT customer_details FROM Customers EXCEPT SELECT T1.customer_details FROM Customers AS T1 JOIN Customer_Policies AS T2 ON T1.customer_id = T2.customer_id