CHICAGO (PRNewswire) - Aon Corporation has announced it was one of 195 major US businesses to receive a 100 percent rating in the Human Rights Campaign Foundation's Corporate Equality Index.

The Index rates employers on a scale from zero to 100 on their treatment of gay, lesbian, bisexual and transgender employees, consumers and investors.

"At Aon we have worked hard to ensure that we build and constantly enhance a diverse and productive work environment, and we are thrilled to be recognised for this effort by the Human Rights Campaign," said Corbette Doyle, Aon's chief diversity officer.

"We are proud to be a leader not only in the insurance and human consulting industries, but in the global business community."

The Corporate Equality Index rated 519 businesses this year on the extent to which they protected their gay, lesbian, bisexual and transgender employees, consumers and investors. Ratings are based on such factors as non-discrimination policies, diversity training and benefits for domestic partners and transgender employees.