Commonwealth Bank of Australia is an Australia-based provider of financial services in Australia. The Company provides retail and commercial banking services predominantly in Australia and in New Zealand through its subsidiary, ASB. It serves approximately 15 million customers. It operates through two segments. The retail management segment has sub-segments covering housing loan, credit cards, personal loans and personal overdrafts. It also covers most non-retail lending where the aggregate credit exposure to a group of related borrowers is less than one million dollars. Auto-decisioning is used to approve credit applications for eligible borrowers in this segment. The risk-rating segment comprises non-retail exposures, including bank and sovereign exposures. Each exposure is assigned an internal Credit Risk-Rating (CRR) based on Probability of Default (PD) and Loss Given Default (LGD). Either a PD Rating Tool or expert judgment is used to determine the PD for customers in this segment