Insurance broker Aon says the cost of a restructuringplan put in place when it bought Hewitt Assoc. in 2010 is $86million higher than its initial estimate and the company iseliminating 1,100 more jobs than its initialestimate.

In a filing with the Securities & Exchange Commission, Aonsays the total cost of its global restructuring plan will come toapproximately $411 million. The firm says the Aon-Hewitt planincludes the elimination of 2,900 by the end of this year. As ofthe end of the first half of 2013, Aon says it has eliminated 2,420jobs at a cost of $225 million.

The plan calls for the consolidation of lease property, whichhas amounted to $89 million since 2010. Total charges also include$14 million for asset impairments and $6 million in other costsinvolving moving costs, consulting and legal fees.

On Friday, the London headquartered insurance brokerage firmreported second quarter results that included restructuring expenses of $53 million inthe quarter, $40 million higher than the previous year.

When Aon announced the restructuring plan in 2010, the firmplanned to eliminate 1,500 to 1,800 positions and consolidate realestate at a cost of $325 million for an annual savings of $355million.

In the filing, Aon says it expects its restructuring plan todeliver savings of approximately $327 million in 2013 and $378million in 2014. Actual total savings, costs and timing may varyfrom its estimate “due to changes in the scope or assumptionsunderlying the plan,” the broker says.

Aon's restructuring stems from its 2010 acquisition of the human resource consulting firm Hewitt for $4.9billion.