Aon plc - 2015 Balance Sheet
It appears that the majority of decrease in current assets, is from a drop in fiduciary assets, funds held "on behalf of clients such as premiums received from clients and claims due to clients that are in transit to and from insurers." A reduction in intangible assets is the largest drop in long-term asset category.
In the liabilities section, an drop in fiduciary liabilities looks to offset drop in fiduciary assets mentioned above. Short-term debt has dropped, while long-term debt has increased.
In the liabilities section, an drop in fiduciary liabilities looks to offset drop in fiduciary assets mentioned above. Short-term debt has dropped, while long-term debt has increased.