-Network: (0010 - Statement - Condensed Consolidated Statements of Income)

-Condensed Consolidated Statements of Income {ID1}

-Statement - Line Items {ID2}

-Revenue {ID3}

Commissions, fees and other {ID4}

Investment income {ID5}

Total revenue {ID6}

-Expenses {ID7}

Compensation and benefits {ID8}

Other general expenses {ID9}

Depreciation and amortization {ID10}

Total operating expenses {ID11}

Operating income {ID12}

Interest expense {ID13}

Other (income) expense {ID14}

Income from continuing operations before income taxes {ID15}

Income taxes {ID16}

Income from continuing operations {ID17}

Income from discontinued operations before income taxes {ID18}

Income taxes {ID19}

Income from discontinued operations {ID20}

Net income {ID21}

Less: Net income attributable to noncontrolling interests {ID22}

Net income attributable to Aon stockholders {ID23}

-Net income attributable to Aon stockholders {ID24}

Income from continuing operations {ID25}

Income from discontinued operations {ID26}

Net income {ID27}

-Basic net income per share attributable to Aon stockholders {ID28}

Continuing operations (in dollars per share) {ID29}

Discontinued operations (in dollars per share) {ID30}

Net income (in dollars per share) {ID31}

-Diluted net income per share attributable to Aon stockholders {ID32}

Continuing operations (in dollars per share) {ID33}

Discontinued operations (in dollars per share) {ID34}

Net income (in dollars per share) {ID35}

Dividends paid per share (in dollars per share) {ID36}

Weighted average common shares outstanding - basic (in shares) {ID37}

Weighted average common shares outstanding - diluted (in shares) {ID38}

-Network: (0020 - Statement - Condensed Consolidated Statements of Financial Position)

-Condensed Consolidated Statements of Financial Position {ID39}

-Statement - Line Items {ID40}

-ASSETS: {ID41}

-CURRENT ASSETS: {ID42}

Cash and cash equivalents {ID43}

Short-term investments {ID44}

Receivables {ID45}

Fiduciary assets {ID46}

Current income tax receivable {ID47}

Other current assets {ID48}

Assets held for sale {ID49}

Total Current Assets {ID50}

Goodwill {ID51}

Other intangible assets, net {ID52}

Fixed assets, net {ID53}

Investments {ID54}

Deferred tax assets {ID55}

Other non-current assets {ID56}

TOTAL ASSETS {ID57}

-LIABILITIES: {ID58}

-CURRENT LIABILITIES: {ID59}

Fiduciary liabilities {ID60}

Short-term debt {ID61}

Accounts payable and accrued liabilities {ID62}

Other current liabilities {ID63}

Liabilities held for sale {ID64}

Total Current Liabilities {ID65}

Long-term debt {ID66}

Deferred tax liabilities {ID67}

Pension and other post employment liabilities {ID68}

Other non-current liabilities {ID69}

TOTAL LIABILITIES {ID70}

-EQUITY {ID71}

-AON STOCKHOLDERS' EQUITY: {ID72}

Common stock - $1 par value; Authorized: 750 shares (issued: 6/30/09 - 362.7; 12/31/08 - 361.7) {ID73}

Additional paid-in capital {ID74}

Retained earnings {ID75}

Treasury stock at cost (shares: 6/30/09 - 88.2; 12/31/08 - 89.9) {ID76}

Accumulated other comprehensive loss {ID77}

TOTAL AON STOCKHOLDERS' EQUITY {ID78}

Noncontrolling interests {ID79}

TOTAL EQUITY {ID80}

TOTAL LIABILITIES AND EQUITY {ID81}

-Network: (0025 - Statement - Condensed Consolidated Statements of Financial Position (parenthetical))

-Condensed Consolidated Statements of Financial Position {ID82}

-Statement - Line Items {ID83}

Common stock, par value (in dollars per share) {ID84}

Common stock, authorized (in shares) {ID85}

Common stock, issued (in shares) {ID86}

Treasury stock (in shares) {ID87}

-Network: (0030 - Statement - Condensed Consolidated Statement of Stockholders' Equity)

-Condensed Consolidated Statement of Stockholders' Equity {ID88}

-Statement - Table {ID89}

-Statement - Equity Component {ID90}

-Equity Component {ID91}

-Aon Stockholders {ID92}

Common Stock and Additional Paid-in Capital {ID93}

Treasury Stock {ID94}

Retained Earnings {ID95}

Accumulated Other Comprehensive Loss, Net of Tax {ID96}

Noncontrolling Interests {ID97}

-Statement - Line Items {ID98}

-Increase (Decrease) in Equity {ID99}

Balance {ID100}

Shares issued, balance {ID101}

Net income {ID102}

Shares issued - employee benefit plans {ID103}

Shares issued - employee benefit plans (in shares) {ID104}

Shares purchased {ID105}

Shares reissued - employee benefit plans {ID106}

Tax benefit - employee benefit plans {ID107}

Stock compensation expense {ID108}

Dividends to stockholders {ID109}

Change in net derivative gains/losses {ID110}

Change in net unrealized investment gains/losses {ID111}

Net foreign currency translation adjustments {ID112}

Net post-retirement benefit obligation {ID113}

Purchase of subsidiary shares from noncontrolling interests {ID114}

Capital contribution by noncontrolling interests {ID115}

Dividends paid to noncontrolling interests on subsidiary common stock {ID116}

Increase (decrease) in stockholders' equity {ID117}

Increase (decrease) in shares {ID118}

Balance {ID119}

Shares issued, balance {ID120}

-Network: (0040 - Statement - Condensed Consolidated Statements of Cash Flows)

-Condensed Consolidated Statements of Cash Flows {ID121}

-Statement - Line Items {ID122}

-Cash Flows from Operating Activities: {ID123}

Net income {ID124}

-Adjustments to reconcile net income to cash provided by operating activities: {ID125}

Gain from disposal of operations {ID126}

Depreciation and amortization of fixed assets {ID127}

Amortization of intangible assets {ID128}

Stock compensation expense {ID129}

Deferred income taxes {ID130}

-Change in assets and liabilities: {ID131}

Change in funds held on behalf of brokerage and consulting clients {ID132}

Net receivables {ID133}

Accounts payable and accrued liabilities {ID134}

Restructuring reserves {ID135}

Pension and other post employment liabilities {ID136}

Other assets and liabilities {ID137}

Cash Provided by Operating Activities {ID138}

-Cash Flows from Investing Activities: {ID139}

Sales of long-term investments {ID140}

Purchase of long-term investments {ID141}

Sales (purchases) of short-term investments, net {ID142}

Acquisition of subsidiaries, net of cash acquired {ID143}

Proceeds from sale of businesses {ID144}

Capital expenditures {ID145}

Cash Provided by Investing Activities {ID146}

-Cash Flows from Financing Activities: {ID147}

Issuance of common stock {ID148}

Treasury stock transactions, net {ID149}

Short-term borrowings (repayments), net {ID150}

Issuance of long-term debt {ID151}

Repayments of long-term debt {ID152}

Cash dividends to stockholders {ID153}

Cash Used for Financing Activities {ID154}

Effect of Exchange Rate Changes on Cash {ID155}

Net Decrease in Cash and Cash Equivalents {ID156}

Cash and Cash Equivalents at Beginning of Period {ID157}

Cash and Cash Equivalents at End of Period {ID158}

-Supplemental disclosures {ID159}

Interest paid {ID160}

Income taxes paid, net of refunds {ID161}

-Network: (1010 - Notes - Statement of Accounting Principles)

-Notes to the Condensed Consolidated Financial Statements {ID162}

Statement of Accounting Principles {ID163}

-Network: (1020 - Notes - Accounting Principles and Practices)

-Notes to the Condensed Consolidated Financial Statements {ID164}

Accounting Principles and Practices {ID165}

-Network: (1030 - Notes - Cash and Cash Equivalents)

-Notes to the Condensed Consolidated Financial Statements {ID166}

Cash and Cash Equivalents {ID167}

-Network: (1040 - Notes - Income Per Share)

-Notes to the Condensed Consolidated Financial Statements {ID168}

Income Per Share {ID169}

-Network: (1050 - Notes - Goodwill and Other Intangible Assets)

-Notes to the Condensed Consolidated Financial Statements {ID170}

Goodwill and Other Intangible Assets {ID171}

-Network: (1060 - Notes - Disposal of Operations)

-Notes to the Condensed Consolidated Financial Statements {ID172}

Disposal of Operations {ID173}

-Network: (1070 - Notes - Restructuring)

-Notes to the Condensed Consolidated Financial Statements {ID174}

Restructuring {ID175}

-Network: (1080 - Notes - Investment Income and Investments)

-Notes to the Condensed Consolidated Financial Statements {ID176}

Investment Income and Investments {ID177}

-Network: (1090 - Notes - Debt)

-Notes to the Condensed Consolidated Financial Statements {ID178}

Debt {ID179}

-Network: (1100 - Notes - Equity)

-Notes to the Condensed Consolidated Financial Statements {ID180}

Equity {ID181}

-Network: (1110 - Notes - Employee Benefits)

-Notes to the Condensed Consolidated Financial Statements {ID182}

Employee Benefits {ID183}

-Network: (1120 - Notes - Stock Compensation Plans)

-Notes to the Condensed Consolidated Financial Statements {ID184}

Stock Compensation Plans {ID185}

-Network: (1130 - Notes - Financial Instruments)

-Notes to the Condensed Consolidated Financial Statements {ID186}

Financial Instruments {ID187}

-Network: (1140 - Notes - Premium Finance Operations)

-Notes to the Condensed Consolidated Financial Statements {ID188}

Premium Finance Operations {ID189}

-Network: (1150 - Notes - Variable Interest Entities)

-Notes to the Condensed Consolidated Financial Statements {ID190}

Variable Interest Entities {ID191}

-Network: (1160 - Notes - Fair Value)

-Notes to the Condensed Consolidated Financial Statements {ID192}

Fair Value {ID193}

-Network: (1170 - Notes - Contingencies)

-Notes to the Condensed Consolidated Financial Statements {ID194}

Contingencies {ID195}

-Network: (1180 - Notes - Business Segments)

-Notes to the Condensed Consolidated Financial Statements {ID196}

Business Segments {ID197}

-Network: (1190 - Notes - Income Tax Disclosure )

-Notes to the Condensed Consolidated Financial Statements {ID198}

Uncertain Tax Provisions {ID199}

-Network: (1200 - Notes - Subsequent Events)

-Notes to the Condensed Consolidated Financial Statements {ID200}

Subsequent Events {ID201}

-Network: (2000 - Notes - Business Combination Disclosure )

-Notes to the Condensed Consolidated Financial Statements {ID202}

Business Combination {ID203}

-Network: (2010 - Notes - Quarterly Financial Information )

-Notes to the Condensed Consolidated Financial Statements {ID204}

Quarterly Financial Information {ID205}

-Network: (9999 - Other Information - Document and Entity Information)

-Document and Entity Information {ID206}

Entity Registrant Name {ID207}

Entity Central Index Key {ID208}

Document Type {ID209}

Document Period End Date {ID210}

Amendment Flag {ID211}

Amendment Description {ID212}

Current Fiscal Year End Date {ID213}

Entity Well-known Seasoned Issuer {ID214}

Entity Voluntary Filers {ID215}

Entity Current Reporting Status {ID216}

Entity Filer Category {ID217}

Entity Public Float {ID218}

Entity Common Stock, Shares Outstanding {ID219}

AON CORP XBRL Taxonomy Presentation Networks