Aon Plc engages in the provision of a range of risk, retirement, and health solutions. It operates through Aon United segment. The Aon United segment gives advice and solutions to clients focused on risk, retirement, and health through five principal products and service revenue lines: Commercial Risk Solutions, Reinsurance Solutions, Retirement Solutions, Health Solutions, and Data and Analytic Services. The Commercial Risk Solutions includes retail brokerage, cyber solutions, global risk consulting, and captives. The Reinsurance Solutions comprises treaty and facultative reinsurance brokerage and capital markets. The Retirement Solutions consists core retirement, investment consulting, and talent, rewards and performance. The Health Solutions involves in heath and benefits brokerage and healthcare exchanges. The Data and Analytic Services composes of Affinity, Aon InPoint, and ReView. The company was founded in 1979 and is headquartered in London, the United Kingdom.