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CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the following Registration Statements:
Registration Statement | | |||||
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Form | Number | Purpose | ||||
S-8 | 33-27984 | Pertaining to Aon's savings plan | ||||
| 33-42575 |
| ||||
| 33-59037 |
| ||||
| 333-50607 |
| ||||
| 333-55773 |
| ||||
| 333-78723 |
| ||||
| 333-168320 |
| ||||
| 333-57706 |
| ||||
| 333-100466 |
| ||||
| 333-103344 |
| ||||
| 333-106584 |
| ||||
| 333-145928 |
| ||||
| 333-145930 |
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| 333-159841 |
| ||||
| 333-174788 |
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| 333-178906 |
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| 333-178991 |
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of our reports dated February 24, 2012, with respect to the consolidated financial statements of Aon Corporation and the effectiveness of internal control over financial reporting of Aon Corporation, included in this Annual Report (Form 10-K) for the year ended December 31, 2011.
/s/ ERNST & YOUNG LLP
Chicago, Illinois
February 24, 2012
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM