v2.4.0.6

Other Financial Data | 12 Months Ended
--- | ---
Dec. 31, 2011
Other Financial Data |
Other Financial Data |
3. Other Financial Data Consolidated Statements of Income Information Other Income Other income consists of the following (in millions):
Years ended December 31 |  | 2011 |  | 2010 |  | 2009 |
--- | --- | --- | --- | --- | --- | --- | ---
Equity earnings |  | $ | 7 |  | $ | 18 |  | $ | 18 |
Realized gain (loss) on sale of investments |  |  | 18 |  |  | (2 | ) |  | (1 | )
(Loss) gain on disposal of businesses |  |  | — |  |  | (4 | ) |  | 13 |
(Loss) gain on extinguishment of debt |  |  | (19 | ) |  | (8 | ) |  | 5 |
Other |  |  | (1 | ) |  | (4 | ) |  | (1 | )
|  | $ | 5 |  | $ | — |  | $ | 34 |
Consolidated Statements of Financial Position Information Fixed Assets, net The components of Fixed assets, net are as follows (in millions):
As of December 31 |  | 2011 |  | 2010 |
--- | --- | --- | --- | --- | ---
Software |  | $ | 730 |  | $ | 662 |
Leasehold improvements |  |  | 407 |  |  | 436 |
Furniture, fixtures and equipment |  |  | 326 |  |  | 342 |
Computer equipment |  |  | 274 |  |  | 245 |
Land and buildings |  |  | 108 |  |  | 108 |
Automobiles |  |  | 39 |  |  | 39 |
Construction in progress |  |  | 87 |  |  | 45 |
|  |  | 1,971 |  |  | 1,877 |
Less: Accumulated depreciation |  |  | 1,188 |  |  | 1,096 |
Fixed assets, net |  | $ | 783 |  | $ | 781 |
Depreciation expense, which includes software amortization, was $220 million, $151 million, and $149 million for the years ended December 31, 2011, 2010, and 2009, respectively.

X
- Details
Name: | aon_OtherFinancialDataDisclosureAbstract
Namespace Prefix: | aon_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The entire disclosures of supplemental information, including descriptions and amounts, related to the balance sheet, income statement, and/or cash flow statement. + References No definition available. + Details
Name: | us-gaap_AdditionalFinancialInformationDisclosureTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration