Aon plc - 2015 Income Statement
Note that although revenue dropped slightly for 2015, total operating expenses have been dropping steadily in this 3-year period, and operating income has risen. The interest expense has been steadily ticking up, matching the firms increase in leverage by taking on more debt, which is a bit unusual for firms in service and consulting business, because they have such a low PP&E requirement versus capital intensive sectors like manufacturing or utilities.