10-Q Filing

AON PLC CIK: 315293 Q1 2025

Filing Information

Form Type	10-Q
Accession Number	`0001628280-25-019927`
Period End Date	20250331
Filing Date	20250425
Fiscal Year	2025
Fiscal Period	Q1
XBRL Instance	aon-20250331_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 154 Income Statement 88 Cash Flow Statement 170 Stockholders Equity 76 Comprehensive Income 40

Balance Sheet 154 line items

Line Item	Tag	Value	Unit	Period
Ordinary shares, nominal value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Ordinary shares, nominal value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Ordinary shares, nominal value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Ordinary shares, nominal value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Ordinary shares, authorized shares (in shares)	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Ordinary shares, authorized shares (in shares)	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Ordinary shares, authorized shares (in shares)	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Ordinary shares, authorized shares (in shares)	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Ordinary shares, issued shares (in shares)	`CommonStockSharesIssued`	216.00M	shares	Point-in-time
Ordinary shares, issued shares (in shares)	`CommonStockSharesIssued`	216.00M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$995.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$995.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$1.08B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$1.08B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$964.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$964.00M	USD	Point-in-time
Ordinary shares, issued shares (in shares)	`CommonStockSharesIssued`	216.10M	shares	Point-in-time
Ordinary shares, issued shares (in shares)	`CommonStockSharesIssued`	216.10M	shares	Point-in-time
Short-term investments	`ShortTermInvestments`	$219.00M	USD	Point-in-time
Short-term investments	`ShortTermInvestments`	$219.00M	USD	Point-in-time
Short-term investments	`ShortTermInvestments`	$366.00M	USD	Point-in-time
Short-term investments	`ShortTermInvestments`	$366.00M	USD	Point-in-time
Receivables, net	`AccountsReceivableNetCurrent`	$3.80B	USD	Point-in-time
Receivables, net	`AccountsReceivableNetCurrent`	$3.80B	USD	Point-in-time
Receivables, net	`AccountsReceivableNetCurrent`	$4.62B	USD	Point-in-time
Receivables, net	`AccountsReceivableNetCurrent`	$4.62B	USD	Point-in-time
Fiduciary assets	`FiduciaryAssets`	$17.57B	USD	Point-in-time
Fiduciary assets	`FiduciaryAssets`	$17.57B	USD	Point-in-time
Fiduciary assets	`FiduciaryAssets`	$17.77B	USD	Point-in-time
Fiduciary assets	`FiduciaryAssets`	$17.77B	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$759.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$759.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$698.00M	USD	Point-in-time
Other current assets	`OtherAssetsCurrent`	$698.00M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$23.43B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$23.43B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$24.41B	USD	Point-in-time
Total current assets	`AssetsCurrent`	$24.41B	USD	Point-in-time
Goodwill	`Goodwill`	$15.70B	USD	Point-in-time
Goodwill	`Goodwill`	$15.70B	USD	Point-in-time
Goodwill	`Goodwill`	$15.23B	USD	Point-in-time
Goodwill	`Goodwill`	$15.23B	USD	Point-in-time
Intangible assets, net	`FiniteLivedIntangibleAssetsNet`	$6.74B	USD	Point-in-time
Intangible assets, net	`FiniteLivedIntangibleAssetsNet`	$6.74B	USD	Point-in-time
Intangible assets, net	`FiniteLivedIntangibleAssetsNet`	$6.87B	USD	Point-in-time
Intangible assets, net	`FiniteLivedIntangibleAssetsNet`	$6.87B	USD	Point-in-time
Fixed assets, net	`PropertyPlantAndEquipmentNet`	$637.00M	USD	Point-in-time
Fixed assets, net	`PropertyPlantAndEquipmentNet`	$637.00M	USD	Point-in-time
Fixed assets, net	`PropertyPlantAndEquipmentNet`	$650.00M	USD	Point-in-time
Fixed assets, net	`PropertyPlantAndEquipmentNet`	$650.00M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$711.00M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$711.00M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$716.00M	USD	Point-in-time
Operating lease right-of-use assets	`OperatingLeaseRightOfUseAsset`	$716.00M	USD	Point-in-time
Deferred tax assets	`DeferredIncomeTaxAssetsNet`	$768.00M	USD	Point-in-time
Deferred tax assets	`DeferredIncomeTaxAssetsNet`	$768.00M	USD	Point-in-time
Deferred tax assets	`DeferredIncomeTaxAssetsNet`	$654.00M	USD	Point-in-time
Deferred tax assets	`DeferredIncomeTaxAssetsNet`	$654.00M	USD	Point-in-time
Prepaid pension	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$556.00M	USD	Point-in-time
Prepaid pension	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$556.00M	USD	Point-in-time
Prepaid pension	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$595.00M	USD	Point-in-time
Prepaid pension	`DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent`	$595.00M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$998.00M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$998.00M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$599.00M	USD	Point-in-time
Other non-current assets	`OtherAssetsNoncurrent`	$599.00M	USD	Point-in-time
Total assets	`Assets`	$48.97B	USD	Point-in-time
Total assets	`Assets`	$48.97B	USD	Point-in-time
Total assets	`Assets`	$50.30B	USD	Point-in-time
Total assets	`Assets`	$50.30B	USD	Point-in-time
Accounts payable and accrued liabilities	`AccountsPayableAndAccruedLiabilitiesCurrent`	$2.90B	USD	Point-in-time
Accounts payable and accrued liabilities	`AccountsPayableAndAccruedLiabilitiesCurrent`	$2.90B	USD	Point-in-time
Accounts payable and accrued liabilities	`AccountsPayableAndAccruedLiabilitiesCurrent`	$2.09B	USD	Point-in-time
Accounts payable and accrued liabilities	`AccountsPayableAndAccruedLiabilitiesCurrent`	$2.09B	USD	Point-in-time
Short-term debt and current portion of long-term debt	`DebtCurrent`	$751.00M	USD	Point-in-time
Short-term debt and current portion of long-term debt	`DebtCurrent`	$751.00M	USD	Point-in-time
Short-term debt and current portion of long-term debt	`DebtCurrent`	$1.35B	USD	Point-in-time
Short-term debt and current portion of long-term debt	`DebtCurrent`	$1.35B	USD	Point-in-time
Fiduciary liabilities	`FiduciaryLiabilities`	$17.57B	USD	Point-in-time
Fiduciary liabilities	`FiduciaryLiabilities`	$17.57B	USD	Point-in-time
Fiduciary liabilities	`FiduciaryLiabilities`	$17.77B	USD	Point-in-time
Fiduciary liabilities	`FiduciaryLiabilities`	$17.77B	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$1.77B	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$1.77B	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$2.13B	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$2.13B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$23.00B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$23.00B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$23.33B	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$23.33B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$16.27B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$16.27B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$16.28B	USD	Point-in-time
Long-term debt	`LongTermDebtNoncurrent`	$16.28B	USD	Point-in-time
Non-current operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$685.00M	USD	Point-in-time
Non-current operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$685.00M	USD	Point-in-time
Non-current operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$689.00M	USD	Point-in-time
Non-current operating lease liabilities	`OperatingLeaseLiabilityNoncurrent`	$689.00M	USD	Point-in-time
Deferred tax liabilities	`DeferredIncomeTaxLiabilitiesNet`	$384.00M	USD	Point-in-time
Deferred tax liabilities	`DeferredIncomeTaxLiabilitiesNet`	$384.00M	USD	Point-in-time
Deferred tax liabilities	`DeferredIncomeTaxLiabilitiesNet`	$319.00M	USD	Point-in-time
Deferred tax liabilities	`DeferredIncomeTaxLiabilitiesNet`	$319.00M	USD	Point-in-time
Pension, other postretirement, and postemployment liabilities	`PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent`	$1.13B	USD	Point-in-time
Pension, other postretirement, and postemployment liabilities	`PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent`	$1.13B	USD	Point-in-time
Pension, other postretirement, and postemployment liabilities	`PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent`	$1.10B	USD	Point-in-time
Pension, other postretirement, and postemployment liabilities	`PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent`	$1.10B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$1.14B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$1.14B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$1.24B	USD	Point-in-time
Other non-current liabilities	`OtherLiabilitiesNoncurrent`	$1.24B	USD	Point-in-time
Total liabilities	`Liabilities`	$43.03B	USD	Point-in-time
Total liabilities	`Liabilities`	$43.03B	USD	Point-in-time
Total liabilities	`Liabilities`	$42.53B	USD	Point-in-time
Total liabilities	`Liabilities`	$42.53B	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$125.00M	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$125.00M	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$79.00M	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityCarryingAmount`	$79.00M	USD	Point-in-time
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2025 - 216.1; 2024 - 216.0)	`CommonStockValue`	$2.00M	USD	Point-in-time
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2025 - 216.1; 2024 - 216.0)	`CommonStockValue`	$2.00M	USD	Point-in-time
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2025 - 216.1; 2024 - 216.0)	`CommonStockValue`	$2.00M	USD	Point-in-time
Ordinary shares - $0.01 nominal value Authorized: 500.0 shares (issued: 2025 - 216.1; 2024 - 216.0)	`CommonStockValue`	$2.00M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$13.17B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$13.17B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$13.20B	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapitalCommonStock`	$13.20B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.74B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-1.74B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-2.31B	USD	Point-in-time
Accumulated deficit	`RetainedEarningsAccumulatedDeficit`	$-2.31B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.46B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.46B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.75B	USD	Point-in-time
Accumulated other comprehensive loss	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-4.75B	USD	Point-in-time
Total Aon shareholders' equity	`StockholdersEquity`	$7.00B	USD	Point-in-time
Total Aon shareholders' equity	`StockholdersEquity`	$7.00B	USD	Point-in-time
Total Aon shareholders' equity	`StockholdersEquity`	$6.12B	USD	Point-in-time
Total Aon shareholders' equity	`StockholdersEquity`	$6.12B	USD	Point-in-time
Nonredeemable noncontrolling interests	`NonredeemableNoncontrollingInterest`	$184.00M	USD	Point-in-time
Nonredeemable noncontrolling interests	`NonredeemableNoncontrollingInterest`	$184.00M	USD	Point-in-time
Nonredeemable noncontrolling interests	`NonredeemableNoncontrollingInterest`	$191.00M	USD	Point-in-time
Nonredeemable noncontrolling interests	`NonredeemableNoncontrollingInterest`	$191.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.20B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.20B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-742.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-742.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-28.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-28.00M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Total liabilities, redeemable noncontrolling interests and equity	`LiabilitiesAndStockholdersEquity`	$50.30B	USD	Point-in-time
Total liabilities, redeemable noncontrolling interests and equity	`LiabilitiesAndStockholdersEquity`	$50.30B	USD	Point-in-time
Total liabilities, redeemable noncontrolling interests and equity	`LiabilitiesAndStockholdersEquity`	$48.97B	USD	Point-in-time
Total liabilities, redeemable noncontrolling interests and equity	`LiabilitiesAndStockholdersEquity`	$48.97B	USD	Point-in-time

Income Statement 88 line items

Line Item	Tag	Value	Unit	Period
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$4.07B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$4.07B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$4.73B	USD	1 Quarter
Total revenue	`RevenueFromContractWithCustomerExcludingAssessedTax`	$4.73B	USD	1 Quarter
Compensation and benefits	`LaborAndRelatedExpense`	$1.88B	USD	1 Quarter
Compensation and benefits	`LaborAndRelatedExpense`	$1.88B	USD	1 Quarter
Compensation and benefits	`LaborAndRelatedExpense`	$2.25B	USD	1 Quarter
Compensation and benefits	`LaborAndRelatedExpense`	$2.25B	USD	1 Quarter
Information technology	`InformationTechnologyAndDataProcessing`	$124.00M	USD	1 Quarter
Information technology	`InformationTechnologyAndDataProcessing`	$124.00M	USD	1 Quarter
Information technology	`InformationTechnologyAndDataProcessing`	$136.00M	USD	1 Quarter
Information technology	`InformationTechnologyAndDataProcessing`	$136.00M	USD	1 Quarter
Premises	`OccupancyNet`	$82.00M	USD	1 Quarter
Premises	`OccupancyNet`	$82.00M	USD	1 Quarter
Premises	`OccupancyNet`	$71.00M	USD	1 Quarter
Premises	`OccupancyNet`	$71.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$44.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$44.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$46.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$46.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$199.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$199.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$16.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$16.00M	USD	1 Quarter
Other general expense	`OtherGeneralExpenses`	$348.00M	USD	1 Quarter
Other general expense	`OtherGeneralExpenses`	$348.00M	USD	1 Quarter
Other general expense	`OtherGeneralExpenses`	$446.00M	USD	1 Quarter
Other general expense	`OtherGeneralExpenses`	$446.00M	USD	1 Quarter
Accelerating Aon United Program expenses	`RestructuringCharges`	$110.00M	USD	1 Quarter
Accelerating Aon United Program expenses	`RestructuringCharges`	$110.00M	USD	1 Quarter
Accelerating Aon United Program expenses	`RestructuringCharges`	$119.00M	USD	1 Quarter
Accelerating Aon United Program expenses	`RestructuringCharges`	$119.00M	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$3.27B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$3.27B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$2.60B	USD	1 Quarter
Total operating expenses	`CostsAndExpenses`	$2.60B	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$1.47B	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$1.47B	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$1.46B	USD	1 Quarter
Operating income	`OperatingIncomeLoss`	$1.46B	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$28.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$28.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$5.00M	USD	1 Quarter
Interest income	`InvestmentIncomeInterestAndDividend`	$5.00M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$206.00M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$206.00M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$144.00M	USD	1 Quarter
Interest expense	`InterestExpenseNonoperating`	$144.00M	USD	1 Quarter
Other income (expense)	`OtherNonoperatingIncomeExpense`	$75.00M	USD	1 Quarter
Other income (expense)	`OtherNonoperatingIncomeExpense`	$75.00M	USD	1 Quarter
Other income (expense)	`OtherNonoperatingIncomeExpense`	$-10.00M	USD	1 Quarter
Other income (expense)	`OtherNonoperatingIncomeExpense`	$-10.00M	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.25B	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.25B	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.42B	USD	1 Quarter
Income before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$1.42B	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$331.00M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$331.00M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$268.00M	USD	1 Quarter
Income tax expense	`IncomeTaxExpenseBenefit`	$268.00M	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$22.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$22.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$17.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$17.00M	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$1.07B	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$1.07B	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$965.00M	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$965.00M	USD	1 Quarter
Basic net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareBasic`	$5.38	USD	1 Quarter
Basic net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareBasic`	$5.38	USD	1 Quarter
Basic net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareBasic`	$4.46	USD	1 Quarter
Basic net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareBasic`	$4.46	USD	1 Quarter
Diluted net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareDiluted`	$5.35	USD	1 Quarter
Diluted net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareDiluted`	$5.35	USD	1 Quarter
Diluted net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareDiluted`	$4.43	USD	1 Quarter
Diluted net income per share attributable to Aon shareholders (in dollars per share)	`EarningsPerShareDiluted`	$4.43	USD	1 Quarter
Weighted average ordinary shares outstanding - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	199.10M	shares	1 Quarter
Weighted average ordinary shares outstanding - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	199.10M	shares	1 Quarter
Weighted average ordinary shares outstanding - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	216.40M	shares	1 Quarter
Weighted average ordinary shares outstanding - basic (in shares)	`WeightedAverageNumberOfSharesOutstandingBasic`	216.40M	shares	1 Quarter
Weighted average ordinary shares outstanding - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	217.90M	shares	1 Quarter
Weighted average ordinary shares outstanding - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	217.90M	shares	1 Quarter
Weighted average ordinary shares outstanding - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	200.10M	shares	1 Quarter
Weighted average ordinary shares outstanding - diluted (in shares)	`WeightedAverageNumberOfDilutedSharesOutstanding`	200.10M	shares	1 Quarter

Cash Flow Statement 170 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$44.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$44.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$46.00M	USD	1 Quarter
Depreciation of fixed assets	`Depreciation`	$46.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$199.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$199.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$16.00M	USD	1 Quarter
Amortization and impairment of intangible assets	`AmortizationAndImpairmentOfIntangibleAssets`	$16.00M	USD	1 Quarter
Share-based compensation expense	`ShareBasedCompensation`	$130.00M	USD	1 Quarter
Share-based compensation expense	`ShareBasedCompensation`	$130.00M	USD	1 Quarter
Share-based compensation expense	`ShareBasedCompensation`	$147.00M	USD	1 Quarter
Share-based compensation expense	`ShareBasedCompensation`	$147.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$-76.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$-76.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$-117.00M	USD	1 Quarter
Deferred income taxes	`DeferredIncomeTaxesAndTaxCredits`	$-117.00M	USD	1 Quarter
Other, net	`OtherNoncashIncomeExpense`	$82.00M	USD	1 Quarter
Other, net	`OtherNoncashIncomeExpense`	$82.00M	USD	1 Quarter
Other, net	`OtherNoncashIncomeExpense`	$17.00M	USD	1 Quarter
Other, net	`OtherNoncashIncomeExpense`	$17.00M	USD	1 Quarter
Receivables, net	`IncreaseDecreaseInReceivables`	$742.00M	USD	1 Quarter
Receivables, net	`IncreaseDecreaseInReceivables`	$742.00M	USD	1 Quarter
Receivables, net	`IncreaseDecreaseInReceivables`	$826.00M	USD	1 Quarter
Receivables, net	`IncreaseDecreaseInReceivables`	$826.00M	USD	1 Quarter
Accounts payable and accrued liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-343.00M	USD	1 Quarter
Accounts payable and accrued liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-343.00M	USD	1 Quarter
Accounts payable and accrued liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-846.00M	USD	1 Quarter
Accounts payable and accrued liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-846.00M	USD	1 Quarter
Accelerating Aon United Program liabilities	`IncreaseDecreaseInRestructuringReserve`	$34.00M	USD	1 Quarter
Accelerating Aon United Program liabilities	`IncreaseDecreaseInRestructuringReserve`	$34.00M	USD	1 Quarter
Accelerating Aon United Program liabilities	`IncreaseDecreaseInRestructuringReserve`	$-6.00M	USD	1 Quarter
Accelerating Aon United Program liabilities	`IncreaseDecreaseInRestructuringReserve`	$-6.00M	USD	1 Quarter
Current income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$163.00M	USD	1 Quarter
Current income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$163.00M	USD	1 Quarter
Current income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$152.00M	USD	1 Quarter
Current income taxes	`IncreaseDecreaseInAccruedIncomeTaxesPayable`	$152.00M	USD	1 Quarter
Pension, other postretirement and postemployment liabilities	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-8.00M	USD	1 Quarter
Pension, other postretirement and postemployment liabilities	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-8.00M	USD	1 Quarter
Pension, other postretirement and postemployment liabilities	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-12.00M	USD	1 Quarter
Pension, other postretirement and postemployment liabilities	`IncreaseDecreaseInPensionAndPostretirementObligations`	$-12.00M	USD	1 Quarter
Other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-350.00M	USD	1 Quarter
Other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-350.00M	USD	1 Quarter
Other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-168.00M	USD	1 Quarter
Other assets and liabilities	`IncreaseDecreaseInOtherOperatingCapitalNet`	$-168.00M	USD	1 Quarter
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$309.00M	USD	1 Quarter
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$309.00M	USD	1 Quarter
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$140.00M	USD	1 Quarter
Cash provided by operating activities	`NetCashProvidedByUsedInOperatingActivities`	$140.00M	USD	1 Quarter
Proceeds from investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$118.00M	USD	1 Quarter
Proceeds from investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$118.00M	USD	1 Quarter
Proceeds from investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$20.00M	USD	1 Quarter
Proceeds from investments	`ProceedsFromSaleAndMaturityOfOtherInvestments`	$20.00M	USD	1 Quarter
Purchases of investments	`PaymentsToAcquireOtherInvestments`	$56.00M	USD	1 Quarter
Purchases of investments	`PaymentsToAcquireOtherInvestments`	$56.00M	USD	1 Quarter
Purchases of investments	`PaymentsToAcquireOtherInvestments`	$19.00M	USD	1 Quarter
Purchases of investments	`PaymentsToAcquireOtherInvestments`	$19.00M	USD	1 Quarter
Net purchases of short-term investments - non fiduciary	`PaymentsForProceedsFromMarketableSecurities`	$145.00M	USD	1 Quarter
Net purchases of short-term investments - non fiduciary	`PaymentsForProceedsFromMarketableSecurities`	$145.00M	USD	1 Quarter
Net purchases of short-term investments - non fiduciary	`PaymentsForProceedsFromMarketableSecurities`	$5.05B	USD	1 Quarter
Net purchases of short-term investments - non fiduciary	`PaymentsForProceedsFromMarketableSecurities`	$5.05B	USD	1 Quarter
Acquisition of businesses, net of cash and funds held on behalf of clients	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$116.00M	USD	1 Quarter
Acquisition of businesses, net of cash and funds held on behalf of clients	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$116.00M	USD	1 Quarter
Acquisition of businesses, net of cash and funds held on behalf of clients	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$4.00M	USD	1 Quarter
Acquisition of businesses, net of cash and funds held on behalf of clients	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$4.00M	USD	1 Quarter
Sale of businesses, net of cash and funds held on behalf of clients	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$24.00M	USD	1 Quarter
Sale of businesses, net of cash and funds held on behalf of clients	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$24.00M	USD	1 Quarter
Sale of businesses, net of cash and funds held on behalf of clients	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$75.00M	USD	1 Quarter
Sale of businesses, net of cash and funds held on behalf of clients	`ProceedsFromDivestitureOfBusinessesNetOfCashDivested`	$75.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$56.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$56.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$48.00M	USD	1 Quarter
Capital expenditures	`PaymentsToAcquirePropertyPlantAndEquipment`	$48.00M	USD	1 Quarter
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-292.00M	USD	1 Quarter
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-292.00M	USD	1 Quarter
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-4.96B	USD	1 Quarter
Cash used for investing activities	`NetCashProvidedByUsedInInvestingActivities`	$-4.96B	USD	1 Quarter
Share repurchase	`PaymentsForRepurchaseOfEquity`	$250.00M	USD	1 Quarter
Share repurchase	`PaymentsForRepurchaseOfEquity`	$250.00M	USD	1 Quarter
Share repurchase	`PaymentsForRepurchaseOfEquity`	$250.00M	USD	1 Quarter
Share repurchase	`PaymentsForRepurchaseOfEquity`	$250.00M	USD	1 Quarter
Proceeds from issuance of shares	`ProceedsFromIssuanceOfCommonStock`	$30.00M	USD	1 Quarter
Proceeds from issuance of shares	`ProceedsFromIssuanceOfCommonStock`	$30.00M	USD	1 Quarter
Proceeds from issuance of shares	`ProceedsFromIssuanceOfCommonStock`	$25.00M	USD	1 Quarter
Proceeds from issuance of shares	`ProceedsFromIssuanceOfCommonStock`	$25.00M	USD	1 Quarter
Cash paid for employee taxes on withholding shares	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$130.00M	USD	1 Quarter
Cash paid for employee taxes on withholding shares	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$130.00M	USD	1 Quarter
Cash paid for employee taxes on withholding shares	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$141.00M	USD	1 Quarter
Cash paid for employee taxes on withholding shares	`PaymentsRelatedToTaxWithholdingForShareBasedCompensation`	$141.00M	USD	1 Quarter
Commercial paper issuances, net of repayments	`ProceedsFromRepaymentsOfCommercialPaper`	$-591.00M	USD	1 Quarter
Commercial paper issuances, net of repayments	`ProceedsFromRepaymentsOfCommercialPaper`	$-591.00M	USD	1 Quarter
Commercial paper issuances, net of repayments	`ProceedsFromRepaymentsOfCommercialPaper`	$594.00M	USD	1 Quarter
Commercial paper issuances, net of repayments	`ProceedsFromRepaymentsOfCommercialPaper`	$594.00M	USD	1 Quarter
Issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	1 Quarter
Issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	-	USD	1 Quarter
Issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$5.94B	USD	1 Quarter
Issuance of debt	`ProceedsFromIssuanceOfLongTermDebt`	$5.94B	USD	1 Quarter
Increase (decrease) in fiduciary liabilities, net of fiduciary receivables	`IncreaseInFiduciaryLiabilitiesNetOfFiduciaryReceivables`	$-355.00M	USD	1 Quarter
Increase (decrease) in fiduciary liabilities, net of fiduciary receivables	`IncreaseInFiduciaryLiabilitiesNetOfFiduciaryReceivables`	$-355.00M	USD	1 Quarter
Increase (decrease) in fiduciary liabilities, net of fiduciary receivables	`IncreaseInFiduciaryLiabilitiesNetOfFiduciaryReceivables`	$394.00M	USD	1 Quarter
Increase (decrease) in fiduciary liabilities, net of fiduciary receivables	`IncreaseInFiduciaryLiabilitiesNetOfFiduciaryReceivables`	$394.00M	USD	1 Quarter
Cash dividends to shareholders	`PaymentsOfDividendsCommonStock`	$147.00M	USD	1 Quarter
Cash dividends to shareholders	`PaymentsOfDividendsCommonStock`	$147.00M	USD	1 Quarter
Cash dividends to shareholders	`PaymentsOfDividendsCommonStock`	$123.00M	USD	1 Quarter
Cash dividends to shareholders	`PaymentsOfDividendsCommonStock`	$123.00M	USD	1 Quarter
Redeemable and nonredeemable noncontrolling interests, and other financing activities	`ProceedsFromPaymentsForNoncontrollingInterestsAndOtherFinancingActivities`	$-6.00M	USD	1 Quarter
Redeemable and nonredeemable noncontrolling interests, and other financing activities	`ProceedsFromPaymentsForNoncontrollingInterestsAndOtherFinancingActivities`	$-6.00M	USD	1 Quarter
Redeemable and nonredeemable noncontrolling interests, and other financing activities	`ProceedsFromPaymentsForNoncontrollingInterestsAndOtherFinancingActivities`	$-80.00M	USD	1 Quarter
Redeemable and nonredeemable noncontrolling interests, and other financing activities	`ProceedsFromPaymentsForNoncontrollingInterestsAndOtherFinancingActivities`	$-80.00M	USD	1 Quarter
Cash provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-349.00M	USD	1 Quarter
Cash provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-349.00M	USD	1 Quarter
Cash provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$5.26B	USD	1 Quarter
Cash provided by (used for) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$5.26B	USD	1 Quarter
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-146.00M	USD	1 Quarter
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-146.00M	USD	1 Quarter
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$196.00M	USD	1 Quarter
Effect of exchange rates on cash and cash equivalents and funds held on behalf of clients	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$196.00M	USD	1 Quarter
Net increase (decrease) in cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-305.00M	USD	1 Quarter
Net increase (decrease) in cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-305.00M	USD	1 Quarter
Net increase (decrease) in cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$463.00M	USD	1 Quarter
Net increase (decrease) in cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$463.00M	USD	1 Quarter
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$7.72B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$7.72B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.03B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.03B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.33B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.33B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.19B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.19B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$7.72B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$7.72B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.03B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.03B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.33B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.33B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.19B	USD	Point-in-time
Cash, cash equivalents and funds held on behalf of clients at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.19B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$995.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$995.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$1.08B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$1.08B	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$964.00M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$964.00M	USD	Point-in-time
Cash and cash equivalents and funds held on behalf of clients classified as held for sale	`DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents`	$2.00M	USD	Point-in-time
Cash and cash equivalents and funds held on behalf of clients classified as held for sale	`DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents`	$2.00M	USD	Point-in-time
Cash and cash equivalents and funds held on behalf of clients classified as held for sale	`DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents`	$73.00M	USD	Point-in-time
Cash and cash equivalents and funds held on behalf of clients classified as held for sale	`DisposalGroupIncludingDiscontinuedOperationCashAndCashEquivalents`	$73.00M	USD	Point-in-time
Funds held on behalf of clients	`FundsHeldForClients`	$7.06B	USD	Point-in-time
Funds held on behalf of clients	`FundsHeldForClients`	$7.06B	USD	Point-in-time
Funds held on behalf of clients	`FundsHeldForClients`	$7.12B	USD	Point-in-time
Funds held on behalf of clients	`FundsHeldForClients`	$7.12B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$7.72B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$7.72B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.03B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.03B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.33B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.33B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.19B	USD	Point-in-time
Total cash and cash equivalents and funds held on behalf of clients	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$8.19B	USD	Point-in-time
Interest paid	`InterestPaidNet`	$95.00M	USD	1 Quarter
Interest paid	`InterestPaidNet`	$95.00M	USD	1 Quarter
Interest paid	`InterestPaidNet`	$273.00M	USD	1 Quarter
Interest paid	`InterestPaidNet`	$273.00M	USD	1 Quarter
Income taxes paid, net of refunds	`IncomeTaxesPaidNet`	$233.00M	USD	1 Quarter
Income taxes paid, net of refunds	`IncomeTaxesPaidNet`	$233.00M	USD	1 Quarter
Income taxes paid, net of refunds	`IncomeTaxesPaidNet`	$244.00M	USD	1 Quarter
Income taxes paid, net of refunds	`IncomeTaxesPaidNet`	$244.00M	USD	1 Quarter

Stockholders Equity 76 line items

Line Item	Tag	Value	Unit	Period
Dividends (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$0.68	USD	1 Quarter
Dividends (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$0.68	USD	1 Quarter
Dividends (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$0.61	USD	1 Quarter
Dividends (in dollars per share)	`CommonStockDividendsPerShareCashPaid`	$0.61	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Net loss related to redeemable noncontrolling interest	`NetIncomeLossAttributableToRedeemableNoncontrollingInterest`	$4.00M	USD	1 Quarter
Net loss related to redeemable noncontrolling interest	`NetIncomeLossAttributableToRedeemableNoncontrollingInterest`	$4.00M	USD	1 Quarter
Beginning balance (in shares)	`CommonStockSharesIssued`	216.00M	shares	Point-in-time
Beginning balance (in shares)	`CommonStockSharesIssued`	216.00M	shares	Point-in-time
Beginning balance (in shares)	`CommonStockSharesIssued`	216.10M	shares	Point-in-time
Beginning balance (in shares)	`CommonStockSharesIssued`	216.10M	shares	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.20B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.20B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-742.00M	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-742.00M	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-28.00M	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-28.00M	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Net income	`NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest`	$986.00M	USD	1 Quarter
Net income	`NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest`	$986.00M	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Shares issued - employee stock compensation plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$-104.00M	USD	1 Quarter
Shares issued - employee stock compensation plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$-104.00M	USD	1 Quarter
Shares issued - employee stock compensation plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$-111.00M	USD	1 Quarter
Shares issued - employee stock compensation plans	`StockIssuedDuringPeriodValueShareBasedCompensation`	$-111.00M	USD	1 Quarter
Shares repurchased	`StockRepurchasedAndRetiredDuringPeriodValue`	$250.00M	USD	1 Quarter
Shares repurchased	`StockRepurchasedAndRetiredDuringPeriodValue`	$250.00M	USD	1 Quarter
Shares repurchased	`StockRepurchasedAndRetiredDuringPeriodValue`	$250.00M	USD	1 Quarter
Shares repurchased	`StockRepurchasedAndRetiredDuringPeriodValue`	$250.00M	USD	1 Quarter
Share-based compensation expense	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$130.00M	USD	1 Quarter
Share-based compensation expense	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$130.00M	USD	1 Quarter
Share-based compensation expense	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$147.00M	USD	1 Quarter
Share-based compensation expense	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$147.00M	USD	1 Quarter
Dividends to shareholders	`DividendsCommonStockCash`	$146.00M	USD	1 Quarter
Dividends to shareholders	`DividendsCommonStockCash`	$146.00M	USD	1 Quarter
Dividends to shareholders	`DividendsCommonStockCash`	$122.00M	USD	1 Quarter
Dividends to shareholders	`DividendsCommonStockCash`	$122.00M	USD	1 Quarter
Net change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$3.00M	USD	1 Quarter
Net change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$3.00M	USD	1 Quarter
Net change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$75.00M	USD	1 Quarter
Net change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$75.00M	USD	1 Quarter
Net foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-132.00M	USD	1 Quarter
Net foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-132.00M	USD	1 Quarter
Net foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$239.00M	USD	1 Quarter
Net foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$239.00M	USD	1 Quarter
Net postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-26.00M	USD	1 Quarter
Net postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-26.00M	USD	1 Quarter
Net postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-47.00M	USD	1 Quarter
Net postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-47.00M	USD	1 Quarter
Purchases of subsidiary shares from nonredeemable noncontrolling interests	`MinorityInterestDecreaseFromRedemptions`	$1.00M	USD	1 Quarter
Purchases of subsidiary shares from nonredeemable noncontrolling interests	`MinorityInterestDecreaseFromRedemptions`	$1.00M	USD	1 Quarter
Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$14.00M	USD	1 Quarter
Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$14.00M	USD	1 Quarter
Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$1.00M	USD	1 Quarter
Dividends paid to nonredeemable noncontrolling interests on subsidiary common stock	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$1.00M	USD	1 Quarter
Remeasurement of redemption value of redeemable noncontrolling interest	`MinorityInterestChangeInRedemptionValue`	$-11.00M	USD	1 Quarter
Remeasurement of redemption value of redeemable noncontrolling interest	`MinorityInterestChangeInRedemptionValue`	$-11.00M	USD	1 Quarter
Ending balance (in shares)	`CommonStockSharesIssued`	216.00M	shares	Point-in-time
Ending balance (in shares)	`CommonStockSharesIssued`	216.00M	shares	Point-in-time
Ending balance (in shares)	`CommonStockSharesIssued`	216.10M	shares	Point-in-time
Ending balance (in shares)	`CommonStockSharesIssued`	216.10M	shares	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.20B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$7.20B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-742.00M	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-742.00M	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-28.00M	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$-28.00M	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.30B	USD	Point-in-time

Comprehensive Income 40 line items

Line Item	Tag	Value	Unit	Period
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$1.09B	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Net income	`ProfitLoss`	$982.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$22.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$22.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$17.00M	USD	1 Quarter
Less: Net income attributable to redeemable and nonredeemable noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$17.00M	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$1.07B	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$1.07B	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$965.00M	USD	1 Quarter
Net income attributable to Aon shareholders	`NetIncomeLoss`	$965.00M	USD	1 Quarter
Change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$3.00M	USD	1 Quarter
Change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$3.00M	USD	1 Quarter
Change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$75.00M	USD	1 Quarter
Change in fair value of financial instruments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$75.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-132.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$-132.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$239.00M	USD	1 Quarter
Foreign currency translation adjustments	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax`	$239.00M	USD	1 Quarter
Postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-26.00M	USD	1 Quarter
Postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-26.00M	USD	1 Quarter
Postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-47.00M	USD	1 Quarter
Postretirement benefit obligation	`OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax`	$-47.00M	USD	1 Quarter
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$289.00M	USD	1 Quarter
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$289.00M	USD	1 Quarter
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-31.00M	USD	1 Quarter
Total other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-31.00M	USD	1 Quarter
Less: Other comprehensive income attributable to noncontrolling interests	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Less: Other comprehensive income attributable to noncontrolling interests	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Less: Other comprehensive income attributable to noncontrolling interests	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Less: Other comprehensive income attributable to noncontrolling interests	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest`	-	USD	1 Quarter
Total other comprehensive income (loss) attributable to Aon shareholders	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$289.00M	USD	1 Quarter
Total other comprehensive income (loss) attributable to Aon shareholders	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$289.00M	USD	1 Quarter
Total other comprehensive income (loss) attributable to Aon shareholders	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-31.00M	USD	1 Quarter
Total other comprehensive income (loss) attributable to Aon shareholders	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-31.00M	USD	1 Quarter
Comprehensive income attributable to Aon shareholders	`ComprehensiveIncomeNetOfTax`	$1.04B	USD	1 Quarter
Comprehensive income attributable to Aon shareholders	`ComprehensiveIncomeNetOfTax`	$1.04B	USD	1 Quarter
Comprehensive income attributable to Aon shareholders	`ComprehensiveIncomeNetOfTax`	$1.25B	USD	1 Quarter
Comprehensive income attributable to Aon shareholders	`ComprehensiveIncomeNetOfTax`	$1.25B	USD	1 Quarter

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.