$AON
Aon plc

2019 Q1 Form 10-Q Financial Statement

#000162828019004829 Filed on April 26, 2019

View on sec.gov

Income Statement

Concept 2019 Q1 2018 Q1
Revenue $3.143B $3.090B
YoY Change 1.72% 29.78%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin $2.043B $2.069B
YoY Change -1.26% 6.16%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization $40.00M $39.00M
YoY Change 2.56% -27.78%
% of Gross Profit
Operating Expenses $2.180B $2.217B
YoY Change -1.67% 8.36%
Operating Profit $872.0M $799.0M
YoY Change 9.14% 138.51%
Interest Expense $72.00M $70.00M
YoY Change 2.86% 0.0%
% of Operating Profit 8.26% 8.76%
Other Income/Expense, Net $0.00 -$15.00M
YoY Change -100.0% 650.0%
Pretax Income $802.0M $718.0M
YoY Change 11.7% 170.94%
Income Tax $126.0M $114.0M
% Of Pretax Income 15.71% 15.88%
Net Earnings $676.0M $610.0M
YoY Change 10.82% 100.0%
Net Earnings / Revenue 21.51% 19.74%
Basic Earnings Per Share $2.72 $2.39
Diluted Earnings Per Share $2.70 $2.37
COMMON SHARES
Basic Shares Outstanding 242.2M shares 248.5M shares
Diluted Shares Outstanding 243.7M shares 250.2M shares

Balance Sheet

Concept 2019 Q1 2018 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments $5.198B $4.815B
YoY Change 7.95% 660.66%
Cash & Equivalents $600.0M $597.0M
Short-Term Investments $4.598B $4.218B
Other Short-Term Assets $531.0M $587.0M
YoY Change -9.54% 89.97%
Inventory
Prepaid Expenses $108.0M $142.0M
Receivables $3.242B $2.730B
Other Receivables $81.00M $118.0M
Total Short-Term Assets $15.92B $15.12B
YoY Change 5.32% -1.81%
LONG-TERM ASSETS
Property, Plant & Equipment $606.0M $578.0M
YoY Change 4.84% 7.84%
Goodwill $8.219B $8.550B
YoY Change -3.87% 13.34%
Intangibles $1.077B $1.662B
YoY Change -35.2% -42.39%
Long-Term Investments $55.00M $58.00M
YoY Change -5.17% -52.07%
Other Assets $509.0M $452.0M
YoY Change 12.61% 19.26%
Total Long-Term Assets $13.22B $12.73B
YoY Change 3.8% 9.86%
TOTAL ASSETS
Total Short-Term Assets $15.92B $15.12B
Total Long-Term Assets $13.22B $12.73B
Total Assets $29.14B $27.85B
YoY Change 4.63% 3.21%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable $1.479B $1.545B
YoY Change -4.27% 15.99%
Accrued Expenses $214.0M
YoY Change
Deferred Revenue $305.0M
YoY Change
Short-Term Debt $0.00 $0.00
YoY Change
Long-Term Debt Due $453.0M $403.0M
YoY Change 12.41% -39.58%
Total Short-Term Liabilities $14.54B $13.66B
YoY Change 6.44% 5.3%
LONG-TERM LIABILITIES
Long-Term Debt $5.990B $5.697B
YoY Change 5.14% 1.55%
Other Long-Term Liabilities $973.0M $1.099B
YoY Change -11.46% 49.93%
Total Long-Term Liabilities $6.963B $6.796B
YoY Change 2.46% 7.14%
TOTAL LIABILITIES
Total Short-Term Liabilities $14.54B $13.66B
Total Long-Term Liabilities $6.963B $6.796B
Total Liabilities $24.27B $22.46B
YoY Change 8.06% 6.17%
SHAREHOLDERS EQUITY
Retained Earnings $2.555B $2.747B
YoY Change -6.99% -30.17%
Common Stock $5.960B $5.745B
YoY Change 3.74% 3.14%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity $4.775B $5.301B
YoY Change
Total Liabilities & Shareholders Equity $29.14B $27.85B
YoY Change 4.63% 3.21%

Cashflow Statement

Concept 2019 Q1 2018 Q1
OPERATING ACTIVITIES
Net Income $676.0M $610.0M
YoY Change 10.82% 100.0%
Depreciation, Depletion And Amortization $40.00M $39.00M
YoY Change 2.56% -27.78%
Cash From Operating Activities $74.00M $140.0M
YoY Change -47.14% -41.67%
INVESTING ACTIVITIES
Capital Expenditures $57.00M $45.00M
YoY Change 26.67% 32.35%
Acquisitions $15.00M $29.00M
YoY Change -48.28% -36.96%
Other Investing Activities $30.00M $391.0M
YoY Change -92.33% 731.91%
Cash From Investing Activities -$27.00M $346.0M
YoY Change -107.8% 2561.54%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net $100.0M $569.0M
YoY Change -82.43% 351.59%
Debt Paid & Issued, Net $694.0M $704.0M
YoY Change -1.42% -25.89%
Cash From Financing Activities -$140.0M -$663.0M
YoY Change -78.88% 156.98%
NET CHANGE
Cash From Operating Activities $74.00M $140.0M
Cash From Investing Activities -$27.00M $346.0M
Cash From Financing Activities -$140.0M -$663.0M
Net Change In Cash -$56.00M -$159.0M
YoY Change -64.78% 3080.0%
FREE CASH FLOW
Cash From Operating Activities $74.00M $140.0M
Capital Expenditures $57.00M $45.00M
Free Cash Flow $17.00M $95.00M
YoY Change -82.11% -53.88%

Facts In Submission

Frame Concept Type Concept / XBRL Key Value Unit
CY2019Q1 dei Amendment Flag
AmendmentFlag
false
CY2019Q1 dei Current Fiscal Year End Date
CurrentFiscalYearEndDate
--12-31
CY2019Q1 dei Document Fiscal Period Focus
DocumentFiscalPeriodFocus
Q1
CY2019Q1 dei Document Fiscal Year Focus
DocumentFiscalYearFocus
2019
CY2019Q1 dei Entity Central Index Key
EntityCentralIndexKey
0000315293
CY2019Q1 dei Entity Emerging Growth Company
EntityEmergingGrowthCompany
false
CY2019Q1 dei Entity Filer Category
EntityFilerCategory
Large Accelerated Filer
CY2019Q1 dei Entity Small Business
EntitySmallBusiness
false
CY2019Q1 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.40
CY2018Q4 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.01
CY2018Q1 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
100000 shares
CY2018Q1 us-gaap Common Stock Dividends Per Share Declared
CommonStockDividendsPerShareDeclared
0.36
CY2019Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
0 USD
CY2019Q1 us-gaap Common Stock Par Or Stated Value Per Share
CommonStockParOrStatedValuePerShare
0.01
CY2018Q4 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
750000000 shares
CY2019Q1 us-gaap Common Stock Shares Authorized
CommonStockSharesAuthorized
750000000 shares
CY2018Q4 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
240100000 shares
CY2019Q1 us-gaap Common Stock Shares Issued
CommonStockSharesIssued
240900000 shares
CY2019Q1 dei Document Type
DocumentType
10-Q
CY2019Q1 dei Document Period End Date
DocumentPeriodEndDate
2019-03-31
CY2019Q1 dei Entity Registrant Name
EntityRegistrantName
Aon plc
CY2019Q2 dei Entity Common Stock Shares Outstanding
EntityCommonStockSharesOutstanding
240521662 shares
CY2019Q1 us-gaap Revenues
Revenues
3143000000 USD
CY2018Q1 us-gaap Revenues
Revenues
3090000000 USD
CY2019Q1 us-gaap Labor And Related Expense
LaborAndRelatedExpense
1584000000 USD
CY2018Q1 us-gaap Labor And Related Expense
LaborAndRelatedExpense
1616000000 USD
CY2019Q1 us-gaap Information Technology And Data Processing
InformationTechnologyAndDataProcessing
117000000 USD
CY2018Q1 us-gaap Information Technology And Data Processing
InformationTechnologyAndDataProcessing
115000000 USD
CY2019Q1 us-gaap Occupancy Net
OccupancyNet
87000000 USD
CY2018Q1 us-gaap Occupancy Net
OccupancyNet
93000000 USD
CY2019Q1 us-gaap Depreciation
Depreciation
40000000 USD
CY2018Q1 us-gaap Depreciation
Depreciation
39000000 USD
CY2019Q1 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
97000000 USD
CY2018Q1 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
110000000 USD
CY2019Q1 aon Other General Expenses
OtherGeneralExpenses
346000000 USD
CY2018Q1 aon Other General Expenses
OtherGeneralExpenses
318000000 USD
CY2019Q1 us-gaap Costs And Expenses
CostsAndExpenses
2271000000 USD
CY2018Q1 us-gaap Costs And Expenses
CostsAndExpenses
2291000000 USD
CY2019Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
872000000 USD
CY2018Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
799000000 USD
CY2019Q1 us-gaap Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
2000000 USD
CY2018Q1 us-gaap Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
4000000 USD
CY2019Q1 us-gaap Interest Expense
InterestExpense
72000000 USD
CY2018Q1 us-gaap Interest Expense
InterestExpense
70000000 USD
CY2019Q1 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
0 USD
CY2018Q1 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-15000000 USD
CY2019Q1 aon Income Loss From Continuing Operations Before Income Taxes
IncomeLossFromContinuingOperationsBeforeIncomeTaxes
802000000 USD
CY2018Q1 aon Income Loss From Continuing Operations Before Income Taxes
IncomeLossFromContinuingOperationsBeforeIncomeTaxes
718000000 USD
CY2018Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
6000000 USD
CY2018Q1 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
114000000 USD
CY2019Q1 us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
676000000 USD
CY2018Q1 us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
604000000 USD
CY2019Q1 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
126000000 USD
CY2019Q1 us-gaap Profit Loss
ProfitLoss
676000000 USD
CY2019Q1 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
243700000 shares
CY2018Q1 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
250200000 shares
CY2018Q1 us-gaap Profit Loss
ProfitLoss
610000000 USD
CY2019Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
17000000 USD
CY2018Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
16000000 USD
CY2019Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
659000000 USD
CY2019Q1 us-gaap Profit Loss
ProfitLoss
676000000 USD
CY2018Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
594000000 USD
CY2019Q1 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
2.72
CY2018Q1 us-gaap Income Loss From Continuing Operations Per Basic Share
IncomeLossFromContinuingOperationsPerBasicShare
2.37
CY2019Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
0
CY2018Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Basic Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicShare
0.02
CY2019Q1 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.72
CY2018Q1 us-gaap Earnings Per Share Basic
EarningsPerShareBasic
2.39
CY2019Q1 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
2.70
CY2018Q1 us-gaap Income Loss From Continuing Operations Per Diluted Share
IncomeLossFromContinuingOperationsPerDilutedShare
2.35
CY2019Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
0
CY2018Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
IncomeLossFromDiscontinuedOperationsNetOfTaxPerDilutedShare
0.02
CY2019Q1 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.70
CY2018Q1 us-gaap Earnings Per Share Diluted
EarningsPerShareDiluted
2.37
CY2019Q1 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
242200000 shares
CY2018Q1 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
248500000 shares
CY2018Q1 us-gaap Profit Loss
ProfitLoss
610000000 USD
CY2019Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
17000000 USD
CY2018Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
16000000 USD
CY2019Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
659000000 USD
CY2018Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
594000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
7000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
14000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
133000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
247000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-31000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-48000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
171000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Net Of Tax
OtherComprehensiveIncomeLossNetOfTax
309000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
2000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
3000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
169000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
306000000 USD
CY2018Q4 us-gaap Short Term Investments
ShortTermInvestments
172000000 USD
CY2018Q4 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
561000000 USD
CY2019Q1 us-gaap Defined Benefit Plan Assets For Plan Benefits Noncurrent
DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
1224000000 USD
CY2019Q1 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
828000000 USD
CY2018Q1 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
900000000 USD
CY2019Q1 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
600000000 USD
CY2018Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
656000000 USD
CY2019Q1 us-gaap Short Term Investments
ShortTermInvestments
134000000 USD
CY2019Q1 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
3242000000 USD
CY2018Q4 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
2760000000 USD
CY2019Q1 aon Fiduciary Assets
FiduciaryAssets
11412000000 USD
CY2018Q4 aon Fiduciary Assets
FiduciaryAssets
10166000000 USD
CY2019Q1 us-gaap Other Assets Current
OtherAssetsCurrent
531000000 USD
CY2018Q4 us-gaap Other Assets Current
OtherAssetsCurrent
618000000 USD
CY2019Q1 us-gaap Assets Current
AssetsCurrent
15919000000 USD
CY2018Q4 us-gaap Assets Current
AssetsCurrent
14372000000 USD
CY2019Q1 us-gaap Goodwill
Goodwill
8219000000 USD
CY2018Q4 us-gaap Goodwill
Goodwill
8171000000 USD
CY2019Q1 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
1077000000 USD
CY2018Q4 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
1149000000 USD
CY2019Q1 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
606000000 USD
CY2018Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
588000000 USD
CY2019Q1 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
993000000 USD
CY2019Q1 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
588000000 USD
CY2018Q4 us-gaap Defined Benefit Plan Assets For Plan Benefits Noncurrent
DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
1133000000 USD
CY2019Q1 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
509000000 USD
CY2019Q1 us-gaap Assets
Assets
29135000000 USD
CY2018Q4 us-gaap Assets
Assets
26422000000 USD
CY2019Q1 us-gaap Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
1479000000 USD
CY2018Q4 us-gaap Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
1943000000 USD
CY2019Q1 us-gaap Debt Current
DebtCurrent
426000000 USD
CY2018Q4 us-gaap Debt Current
DebtCurrent
251000000 USD
CY2019Q1 aon Fiduciary Liabilities
FiduciaryLiabilities
11412000000 USD
CY2018Q4 aon Fiduciary Liabilities
FiduciaryLiabilities
10166000000 USD
CY2019Q1 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
1220000000 USD
CY2019Q1 us-gaap Liabilities Current
LiabilitiesCurrent
14537000000 USD
CY2018Q4 us-gaap Liabilities Current
LiabilitiesCurrent
13296000000 USD
CY2019Q1 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
5990000000 USD
CY2018Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
5993000000 USD
CY2019Q1 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
978000000 USD
CY2018Q4 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
181000000 USD
CY2019Q1 us-gaap Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
1590000000 USD
CY2018Q4 us-gaap Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
1636000000 USD
CY2019Q1 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
973000000 USD
CY2019Q1 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
205000000 USD
CY2019Q1 us-gaap Liabilities
Liabilities
24273000000 USD
CY2019Q1 us-gaap Minority Interest
MinorityInterest
87000000 USD
CY2018Q4 us-gaap Minority Interest
MinorityInterest
68000000 USD
CY2019Q1 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
4862000000 USD
CY2018Q4 us-gaap Liabilities
Liabilities
22203000000 USD
CY2019Q1 us-gaap Common Stock Value
CommonStockValue
2000000 USD
CY2018Q4 us-gaap Common Stock Value
CommonStockValue
2000000 USD
CY2019Q1 us-gaap Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
5958000000 USD
CY2018Q4 us-gaap Additional Paid In Capital Common Stock
AdditionalPaidInCapitalCommonStock
5965000000 USD
CY2019Q1 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
2555000000 USD
CY2018Q4 us-gaap Retained Earnings Accumulated Deficit
RetainedEarningsAccumulatedDeficit
2093000000 USD
CY2019Q1 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-3740000000 USD
CY2018Q4 us-gaap Accumulated Other Comprehensive Income Loss Net Of Tax
AccumulatedOtherComprehensiveIncomeLossNetOfTax
-3909000000 USD
CY2019Q1 us-gaap Stockholders Equity
StockholdersEquity
4775000000 USD
CY2018Q4 us-gaap Stockholders Equity
StockholdersEquity
4151000000 USD
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
4219000000 USD
CY2019Q1 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
29135000000 USD
CY2018Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
26422000000 USD
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
4219000000 USD
CY2019Q1 us-gaap Profit Loss
ProfitLoss
676000000 USD
CY2019Q1 us-gaap Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
-96000000 USD
CY2019Q1 us-gaap Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
101000000 USD
CY2019Q1 us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
89000000 USD
CY2019Q1 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
96000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
7000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
133000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-31000000 USD
CY2019Q1 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
4862000000 USD
CY2017Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
5140000000 USD
CY2018Q1 us-gaap Profit Loss
ProfitLoss
610000000 USD
CY2018Q1 us-gaap Stock Issued During Period Value Share Based Compensation
StockIssuedDuringPeriodValueShareBasedCompensation
-109000000 USD
CY2018Q1 us-gaap Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
553000000 USD
CY2018Q1 us-gaap Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue
77000000 USD
CY2018Q1 us-gaap Dividends Common Stock Cash
DividendsCommonStockCash
89000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
14000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
247000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-48000000 USD
CY2018Q1 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
5385000000 USD
CY2019Q1 us-gaap Profit Loss
ProfitLoss
676000000 USD
CY2018Q1 us-gaap Profit Loss
ProfitLoss
610000000 USD
CY2019Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
0 USD
CY2018Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
6000000 USD
CY2018Q1 us-gaap Increase Decrease In Client Funds Held
IncreaseDecreaseInClientFundsHeld
195000000 USD
CY2019Q1 aon Gainon Saleof Businessand Investments Net
GainonSaleofBusinessandInvestmentsNet
4000000 USD
CY2018Q1 aon Gainon Saleof Businessand Investments Net
GainonSaleofBusinessandInvestmentsNet
-1000000 USD
CY2019Q1 us-gaap Depreciation
Depreciation
40000000 USD
CY2018Q1 us-gaap Depreciation
Depreciation
39000000 USD
CY2019Q1 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
97000000 USD
CY2018Q1 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
110000000 USD
CY2019Q1 aon Increase Decrease In Fiduciary Liabilities
IncreaseDecreaseInFiduciaryLiabilities
1150000000 USD
CY2019Q1 us-gaap Share Based Compensation
ShareBasedCompensation
89000000 USD
CY2018Q1 us-gaap Share Based Compensation
ShareBasedCompensation
77000000 USD
CY2019Q1 us-gaap Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
-25000000 USD
CY2018Q1 us-gaap Deferred Income Taxes And Tax Credits
DeferredIncomeTaxesAndTaxCredits
26000000 USD
CY2019Q1 aon Increase Decrease In Fiduciary Receivables
IncreaseDecreaseInFiduciaryReceivables
609000000 USD
CY2018Q1 aon Increase Decrease In Fiduciary Receivables
IncreaseDecreaseInFiduciaryReceivables
605000000 USD
CY2019Q1 us-gaap Increase Decrease In Client Funds Held
IncreaseDecreaseInClientFundsHeld
541000000 USD
CY2018Q1 aon Increase Decrease In Fiduciary Liabilities
IncreaseDecreaseInFiduciaryLiabilities
800000000 USD
CY2019Q1 us-gaap Increase Decrease In Receivables
IncreaseDecreaseInReceivables
458000000 USD
CY2018Q1 us-gaap Increase Decrease In Receivables
IncreaseDecreaseInReceivables
269000000 USD
CY2019Q1 us-gaap Increase Decrease In Accounts Payable And Accrued Liabilities
IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
-454000000 USD
CY2018Q1 us-gaap Increase Decrease In Accounts Payable And Accrued Liabilities
IncreaseDecreaseInAccountsPayableAndAccruedLiabilities
-439000000 USD
CY2019Q1 us-gaap Increase Decrease In Restructuring Reserve
IncreaseDecreaseInRestructuringReserve
-25000000 USD
CY2018Q1 us-gaap Increase Decrease In Restructuring Reserve
IncreaseDecreaseInRestructuringReserve
-24000000 USD
CY2019Q1 us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
118000000 USD
CY2018Q1 us-gaap Increase Decrease In Accrued Income Taxes Payable
IncreaseDecreaseInAccruedIncomeTaxesPayable
30000000 USD
CY2019Q1 us-gaap Increase Decrease In Pension And Postretirement Obligations
IncreaseDecreaseInPensionAndPostretirementObligations
-54000000 USD
CY2018Q1 us-gaap Increase Decrease In Pension And Postretirement Obligations
IncreaseDecreaseInPensionAndPostretirementObligations
-53000000 USD
CY2019Q1 us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
-74000000 USD
CY2018Q1 us-gaap Increase Decrease In Other Operating Capital Net
IncreaseDecreaseInOtherOperatingCapitalNet
-38000000 USD
CY2019Q1 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
74000000 USD
CY2018Q1 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
140000000 USD
CY2019Q1 us-gaap Proceeds From Sale And Maturity Of Other Investments
ProceedsFromSaleAndMaturityOfOtherInvestments
12000000 USD
CY2018Q1 us-gaap Proceeds From Sale And Maturity Of Other Investments
ProceedsFromSaleAndMaturityOfOtherInvestments
17000000 USD
CY2019Q1 us-gaap Payments To Acquire Other Investments
PaymentsToAcquireOtherInvestments
14000000 USD
CY2018Q1 us-gaap Payments To Acquire Other Investments
PaymentsToAcquireOtherInvestments
11000000 USD
CY2019Q1 aon Payments For Proceeds From Marketable Securities
PaymentsForProceedsFromMarketableSecurities
-41000000 USD
CY2018Q1 aon Payments For Proceeds From Marketable Securities
PaymentsForProceedsFromMarketableSecurities
-415000000 USD
CY2019Q1 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
15000000 USD
CY2018Q1 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
29000000 USD
CY2019Q1 us-gaap Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
6000000 USD
CY2018Q1 us-gaap Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
-1000000 USD
CY2019Q1 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
57000000 USD
CY2018Q1 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
45000000 USD
CY2019Q1 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-27000000 USD
CY2018Q1 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
346000000 USD
CY2019Q1 us-gaap Payments For Repurchase Of Equity
PaymentsForRepurchaseOfEquity
100000000 USD
CY2018Q1 us-gaap Payments For Repurchase Of Equity
PaymentsForRepurchaseOfEquity
569000000 USD
CY2019Q1 aon Proceeds Payment Towards Issuanceof Shares Under Incentiveand Sharebased Compensation Plans Netof Payments Relatedto Tax Withholdingfor Sharebased Compensation
ProceedsPaymentTowardsIssuanceofSharesUnderIncentiveandSharebasedCompensationPlansNetofPaymentsRelatedtoTaxWithholdingforSharebasedCompensation
-98000000 USD
CY2018Q1 aon Proceeds Payment Towards Issuanceof Shares Under Incentiveand Sharebased Compensation Plans Netof Payments Relatedto Tax Withholdingfor Sharebased Compensation
ProceedsPaymentTowardsIssuanceofSharesUnderIncentiveandSharebasedCompensationPlansNetofPaymentsRelatedtoTaxWithholdingforSharebasedCompensation
-109000000 USD
CY2019Q1 us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
871000000 USD
CY2018Q1 us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
808000000 USD
CY2019Q1 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
694000000 USD
CY2018Q1 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
704000000 USD
CY2019Q1 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
96000000 USD
CY2018Q1 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
89000000 USD
CY2019Q1 us-gaap Payments To Minority Shareholders
PaymentsToMinorityShareholders
23000000 USD
CY2018Q1 us-gaap Payments To Minority Shareholders
PaymentsToMinorityShareholders
0 USD
CY2019Q1 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-140000000 USD
CY2018Q1 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-663000000 USD
CY2019Q1 us-gaap Effect Of Exchange Rate On Cash And Cash Equivalents
EffectOfExchangeRateOnCashAndCashEquivalents
37000000 USD
CY2018Q1 us-gaap Effect Of Exchange Rate On Cash And Cash Equivalents
EffectOfExchangeRateOnCashAndCashEquivalents
18000000 USD
CY2019Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
-56000000 USD
CY2018Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
-159000000 USD
CY2018Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
656000000 USD
CY2017Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
756000000 USD
CY2019Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
600000000 USD
CY2018Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
597000000 USD
CY2019Q1 us-gaap Interest Paid Net
InterestPaidNet
27000000 USD
CY2018Q1 us-gaap Interest Paid Net
InterestPaidNet
58000000 USD
CY2019Q1 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
33000000 USD
CY2018Q1 us-gaap Income Taxes Paid Net
IncomeTaxesPaidNet
58000000 USD
CY2019Q1 aon Cash And Cash Equivalents And Short Term Investments Period Increase Decrease
CashAndCashEquivalentsAndShortTermInvestmentsPeriodIncreaseDecrease
-94000000 USD
CY2019Q1 us-gaap Restricted Cash And Investments Current
RestrictedCashAndInvestmentsCurrent
140000000 USD
CY2018Q4 us-gaap Restricted Cash And Investments Current
RestrictedCashAndInvestmentsCurrent
91000000 USD
CY2019Q1 us-gaap Use Of Estimates
UseOfEstimates
Use of EstimatesThe preparation of the accompanying Financial Statements in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosures of contingent assets and liabilities at the date of the Financial Statements, and the reported amounts of reserves and expenses. These estimates and assumptions are based on management’s best estimates and judgments. Management evaluates its estimates and assumptions on an ongoing basis using historical experience and other factors, including the current economic environment. Management believes its estimates to be reasonable given the current facts available. Aon adjusts such estimates and assumptions when facts and circumstances dictate.  Illiquid credit markets, volatile equity markets, and foreign currency exchange rate movements increase the uncertainty inherent in such estimates and assumptions. As future events and their effects cannot be determined with precision, actual results could differ significantly from these estimates. Changes in estimates resulting from continuing changes in the economic environment would, if applicable, be reflected in the Financial Statements in future periods.
CY2019Q1 us-gaap Revenues
Revenues
3143000000 USD
CY2018Q1 us-gaap Revenues
Revenues
3090000000 USD
CY2019Q1 us-gaap Revenues
Revenues
3143000000 USD
CY2018Q1 us-gaap Revenues
Revenues
3090000000 USD
CY2019Q1 aon Cashand Cash Equivalentsand Short Term Investments
CashandCashEquivalentsandShortTermInvestments
734000000 USD
CY2018Q4 aon Cashand Cash Equivalentsand Short Term Investments
CashandCashEquivalentsandShortTermInvestments
828000000 USD
CY2019Q1 us-gaap Restricted Cash And Cash Equivalents
RestrictedCashAndCashEquivalents
48000000 USD
CY2019Q1 aon Restricted Cash Operating Funds
RestrictedCashOperatingFunds
42700000 GBP
CY2019Q1 aon Restricted Cash Operating Funds
RestrictedCashOperatingFunds
56400000 USD
CY2018Q4 aon Restricted Cash Operating Funds
RestrictedCashOperatingFunds
53900000 USD
CY2019Q1 us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-11000000 USD
CY2018Q1 us-gaap Foreign Currency Transaction Gain Loss Before Tax
ForeignCurrencyTransactionGainLossBeforeTax
-16000000 USD
CY2019Q1 us-gaap Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
5000000 USD
CY2018Q1 us-gaap Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
-1000000 USD
CY2019Q1 us-gaap Pension Expense
PensionExpense
-4000000 USD
CY2018Q1 us-gaap Pension Expense
PensionExpense
-2000000 USD
CY2019Q1 us-gaap Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
1000000 USD
CY2018Q1 us-gaap Income Loss From Equity Method Investments
IncomeLossFromEquityMethodInvestments
1000000 USD
CY2019Q1 us-gaap Gain Loss On Sale Of Investments
GainLossOnSaleOfInvestments
1000000 USD
CY2018Q1 us-gaap Gain Loss On Sale Of Investments
GainLossOnSaleOfInvestments
0 USD
CY2019Q1 aon Other Nonoperating Income Expense Other
OtherNonoperatingIncomeExpenseOther
0 USD
CY2018Q1 aon Other Nonoperating Income Expense Other
OtherNonoperatingIncomeExpenseOther
-1000000 USD
CY2019Q1 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
0 USD
CY2018Q1 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-15000000 USD
CY2018Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
64000000 USD
CY2017Q4 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
59000000 USD
CY2019Q1 us-gaap Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
8000000 USD
CY2018Q1 us-gaap Provision For Doubtful Accounts
ProvisionForDoubtfulAccounts
8000000 USD
CY2019Q1 us-gaap Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
8000000 USD
CY2018Q1 us-gaap Allowance For Doubtful Accounts Receivable Write Offs
AllowanceForDoubtfulAccountsReceivableWriteOffs
3000000 USD
CY2019Q1 us-gaap Allowance For Doubtful Accounts Receivable Period Increase Decrease
AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
0 USD
CY2018Q1 us-gaap Allowance For Doubtful Accounts Receivable Period Increase Decrease
AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease
1000000 USD
CY2019Q1 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
64000000 USD
CY2018Q1 us-gaap Allowance For Doubtful Accounts Receivable Current
AllowanceForDoubtfulAccountsReceivableCurrent
65000000 USD
CY2019Q1 aon Other Tax Assets Current
OtherTaxAssetsCurrent
81000000 USD
CY2019Q1 us-gaap Contract With Customer Asset Net Current
ContractWithCustomerAssetNetCurrent
236000000 USD
CY2018Q4 us-gaap Contract With Customer Asset Net Current
ContractWithCustomerAssetNetCurrent
329000000 USD
CY2019Q1 us-gaap Prepaid Expense Current
PrepaidExpenseCurrent
108000000 USD
CY2018Q4 us-gaap Prepaid Expense Current
PrepaidExpenseCurrent
97000000 USD
CY2018Q4 aon Other Tax Assets Current
OtherTaxAssetsCurrent
113000000 USD
CY2019Q1 us-gaap Other Assets Miscellaneous Current
OtherAssetsMiscellaneousCurrent
106000000 USD
CY2018Q4 us-gaap Other Assets Miscellaneous Current
OtherAssetsMiscellaneousCurrent
79000000 USD
CY2019Q1 us-gaap Other Assets Current
OtherAssetsCurrent
531000000 USD
CY2018Q4 us-gaap Other Assets Current
OtherAssetsCurrent
618000000 USD
CY2018Q4 us-gaap Disposal Group Including Discontinued Operation Accounts Notes And Loans Receivable Net
DisposalGroupIncludingDiscontinuedOperationAccountsNotesAndLoansReceivableNet
12000000 USD
CY2019Q1 us-gaap Contract With Customer Asset Net Noncurrent
ContractWithCustomerAssetNetNoncurrent
155000000 USD
CY2018Q4 us-gaap Contract With Customer Asset Net Noncurrent
ContractWithCustomerAssetNetNoncurrent
156000000 USD
CY2019Q1 us-gaap Income Taxes Receivable Noncurrent
IncomeTaxesReceivableNoncurrent
99000000 USD
CY2018Q4 us-gaap Income Taxes Receivable Noncurrent
IncomeTaxesReceivableNoncurrent
100000000 USD
CY2019Q1 us-gaap Finance Lease Right Of Use Asset
FinanceLeaseRightOfUseAsset
70000000 USD
CY2019Q1 us-gaap Long Term Investments
LongTermInvestments
55000000 USD
CY2018Q4 us-gaap Long Term Investments
LongTermInvestments
54000000 USD
CY2019Q1 us-gaap Other Assets Miscellaneous Noncurrent
OtherAssetsMiscellaneousNoncurrent
130000000 USD
CY2018Q4 us-gaap Other Assets Miscellaneous Noncurrent
OtherAssetsMiscellaneousNoncurrent
138000000 USD
CY2019Q1 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
509000000 USD
CY2018Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
448000000 USD
CY2019Q1 us-gaap Contract With Customer Liability Current
ContractWithCustomerLiabilityCurrent
305000000 USD
CY2018Q4 us-gaap Contract With Customer Liability Current
ContractWithCustomerLiabilityCurrent
251000000 USD
CY2019Q1 aon Operating Lease And Finance Lease Liability Current
OperatingLeaseAndFinanceLeaseLiabilityCurrent
241000000 USD
CY2019Q1 us-gaap Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
158000000 USD
CY2018Q4 us-gaap Accrued Income Taxes Current
AccruedIncomeTaxesCurrent
83000000 USD
CY2019Q1 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
516000000 USD
CY2018Q4 us-gaap Other Accrued Liabilities Current
OtherAccruedLiabilitiesCurrent
602000000 USD
CY2019Q1 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
1220000000 USD
CY2018Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
936000000 USD
CY2019Q1 us-gaap Contract With Customer Liability Revenue Recognized
ContractWithCustomerLiabilityRevenueRecognized
134000000 USD
CY2018 us-gaap Contract With Customer Liability Revenue Recognized
ContractWithCustomerLiabilityRevenueRecognized
487000000 USD
CY2019Q1 us-gaap Accrued Income Taxes Noncurrent
AccruedIncomeTaxesNoncurrent
596000000 USD
CY2018Q4 us-gaap Accrued Income Taxes Noncurrent
AccruedIncomeTaxesNoncurrent
585000000 USD
CY2019Q1 aon Operating Lease And Finance Lease Liabilities Noncurrent
OperatingLeaseAndFinanceLeaseLiabilitiesNoncurrent
50000000 USD
CY2018Q4 aon Operating Lease And Finance Lease Liabilities Noncurrent
OperatingLeaseAndFinanceLeaseLiabilitiesNoncurrent
169000000 USD
CY2019Q1 us-gaap Contract With Customer Liability Noncurrent
ContractWithCustomerLiabilityNoncurrent
60000000 USD
CY2018Q4 us-gaap Contract With Customer Liability Noncurrent
ContractWithCustomerLiabilityNoncurrent
65000000 USD
CY2019Q1 aon Employeerelated Liabilities Noncurrent
EmployeerelatedLiabilitiesNoncurrent
44000000 USD
CY2018Q4 aon Employeerelated Liabilities Noncurrent
EmployeerelatedLiabilitiesNoncurrent
56000000 USD
CY2019Q1 us-gaap Other Accrued Liabilities Noncurrent
OtherAccruedLiabilitiesNoncurrent
223000000 USD
CY2018Q4 us-gaap Other Accrued Liabilities Noncurrent
OtherAccruedLiabilitiesNoncurrent
222000000 USD
CY2019Q1 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
973000000 USD
CY2018Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1097000000 USD
CY2019Q1 aon Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Liability Noncurrent
TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalLiabilityNoncurrent
238000000 USD
CY2018Q4 aon Tax Cuts And Jobs Act Of2017 Incomplete Accounting Transition Tax For Accumulated Foreign Earnings Provisional Liability Noncurrent
TaxCutsAndJobsActOf2017IncompleteAccountingTransitionTaxForAccumulatedForeignEarningsProvisionalLiabilityNoncurrent
240000000 USD
CY2019Q1 us-gaap Number Of Businesses Acquired
NumberOfBusinessesAcquired
1 acquisition
CY2018 us-gaap Number Of Businesses Acquired
NumberOfBusinessesAcquired
8 acquisition
CY2019Q1 us-gaap Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
5000000 USD
CY2018Q1 us-gaap Disposal Group Not Discontinued Operation Gain Loss On Disposal
DisposalGroupNotDiscontinuedOperationGainLossOnDisposal
-1000000 USD
CY2018Q4 us-gaap Goodwill
Goodwill
8171000000 USD
CY2019Q1 us-gaap Goodwill Acquired During Period
GoodwillAcquiredDuringPeriod
15000000 USD
CY2019Q1 us-gaap Goodwill Written Off Related To Sale Of Business Unit
GoodwillWrittenOffRelatedToSaleOfBusinessUnit
1000000 USD
CY2019Q1 us-gaap Goodwill Purchase Accounting Adjustments
GoodwillPurchaseAccountingAdjustments
1000000 USD
CY2019Q1 us-gaap Goodwill Foreign Currency Translation Gain Loss
GoodwillForeignCurrencyTranslationGainLoss
33000000 USD
CY2019Q1 us-gaap Goodwill
Goodwill
8219000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
3703000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
2626000000 USD
CY2019Q1 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
1077000000 USD
CY2018Q4 us-gaap Finite Lived Intangible Assets Gross
FiniteLivedIntangibleAssetsGross
3658000000 USD
CY2018Q4 us-gaap Finite Lived Intangible Assets Accumulated Amortization
FiniteLivedIntangibleAssetsAccumulatedAmortization
2509000000 USD
CY2018Q4 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
1149000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Amortization Expense Remainder Of Fiscal Year
FiniteLivedIntangibleAssetsAmortizationExpenseRemainderOfFiscalYear
311000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Amortization Expense Year Two
FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo
217000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Amortization Expense Year Three
FiniteLivedIntangibleAssetsAmortizationExpenseYearThree
128000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Amortization Expense Year Four
FiniteLivedIntangibleAssetsAmortizationExpenseYearFour
85000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Amortization Expense Year Five
FiniteLivedIntangibleAssetsAmortizationExpenseYearFive
73000000 USD
CY2019Q1 aon Finite L Ived Intangible Assets Amortization Expense Year Six
FiniteLIvedIntangibleAssetsAmortizationExpenseYearSix
56000000 USD
CY2019Q1 aon Finite Lived Intangible Assets Amortization Expense After Year Six
FiniteLivedIntangibleAssetsAmortizationExpenseAfterYearSix
207000000 USD
CY2019Q1 us-gaap Finite Lived Intangible Assets Net
FiniteLivedIntangibleAssetsNet
1077000000 USD
CY2019Q1 aon Number Of Credit Facilities
NumberOfCreditFacilities
2 credit_facility
CY2019Q1 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.157
CY2018Q1 us-gaap Effective Income Tax Rate Continuing Operations
EffectiveIncomeTaxRateContinuingOperations
0.159
CY2019Q1 us-gaap Schedule Of Repurchase Agreements
ScheduleOfRepurchaseAgreements
The following table summarizes the Company’s Share Repurchase activity (in millions, except per share data):<div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;margin-left:auto;margin-right:auto;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="8"/></tr><tr><td style="width:75%;"/><td style="width:1%;"/><td style="width:10%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:1%;"/><td style="width:10%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="7" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Three Months Ended March 31</span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2019</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2018</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Shares repurchased</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>0.6</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>3.9</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Average price per share</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>161.16</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>140.94</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Costs recorded to retained earnings:</span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Total repurchase cost</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>100</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>550</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Additional associated costs</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>1</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>3</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">Total costs recorded to retained earnings</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>101</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;">$</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><span>553</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div>
us-gaap Treasury Stock Shares Acquired
TreasuryStockSharesAcquired
118900000 shares
us-gaap Treasury Stock Value Acquired Cost Method
TreasuryStockValueAcquiredCostMethod
11100000000 USD
CY2019Q1 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
242200000 shares
CY2018Q1 us-gaap Weighted Average Number Of Shares Outstanding Basic
WeightedAverageNumberOfSharesOutstandingBasic
248500000 shares
CY2019Q1 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
1500000 shares
CY2018Q1 us-gaap Incremental Common Shares Attributable To Share Based Payment Arrangements
IncrementalCommonSharesAttributableToShareBasedPaymentArrangements
1700000 shares
CY2019Q1 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
243700000 shares
CY2018Q1 us-gaap Weighted Average Number Of Diluted Shares Outstanding
WeightedAverageNumberOfDilutedSharesOutstanding
250200000 shares
CY2019Q1 us-gaap Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount
100000 shares
CY2019Q1 us-gaap Other Comprehensive Income Loss Before Reclassifications Net Of Tax
OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax
146000000 USD
CY2019Q1 us-gaap Reclassification From Accumulated Other Comprehensive Income Current Period Before Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodBeforeTax
-31000000 USD
CY2019Q1 aon Reclassification From Accumulated Other Comprehensive Income Current Period Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodTax
8000000 USD
CY2019Q1 us-gaap Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax
ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax
-23000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
169000000 USD
CY2019Q1 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
89000000 USD
CY2018Q1 us-gaap Allocated Share Based Compensation Expense
AllocatedShareBasedCompensationExpense
77000000 USD
CY2019Q1 us-gaap Derivative Fair Value Of Derivative Asset
DerivativeFairValueOfDerivativeAsset
20000000 USD
CY2019Q1 invest Derivative Notional Amount
DerivativeNotionalAmount
886000000 USD
CY2018Q4 invest Derivative Notional Amount
DerivativeNotionalAmount
915000000 USD
CY2018Q4 us-gaap Derivative Fair Value Of Derivative Asset
DerivativeFairValueOfDerivativeAsset
18000000 USD
CY2019Q1 us-gaap Derivative Fair Value Of Derivative Liability
DerivativeFairValueOfDerivativeLiability
1000000 USD
CY2018Q4 us-gaap Derivative Fair Value Of Derivative Liability
DerivativeFairValueOfDerivativeLiability
8000000 USD
CY2019Q1 us-gaap Derivative Term Of Contract
DerivativeTermOfContract
P30D
CY2019Q1 us-gaap Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax
OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax
4000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax
OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax
14000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax
OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax
-5000000 USD
CY2018Q1 us-gaap Derivative Instruments Gain Loss Reclassified From Accumulated Oci Into Income Effective Portion Net
DerivativeInstrumentsGainLossReclassifiedFromAccumulatedOCIIntoIncomeEffectivePortionNet
-4000000 USD
CY2019Q1 us-gaap Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months
CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths
-10000000 USD
CY2019Q1 us-gaap Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
92000000 USD
CY2018Q4 us-gaap Letters Of Credit Outstanding Amount
LettersOfCreditOutstandingAmount
83000000 USD
CY2019Q1 us-gaap Guarantee Obligations Maximum Exposure
GuaranteeObligationsMaximumExposure
76000000 USD
CY2018Q4 us-gaap Guarantee Obligations Maximum Exposure
GuaranteeObligationsMaximumExposure
103000000 USD
CY2019Q1 aon Number Of Performance Metrics Measured
NumberOfPerformanceMetricsMeasured
4 metric
CY2019Q1 us-gaap Number Of Operating Segments
NumberOfOperatingSegments
1 segment
CY2019Q1 us-gaap Number Of Reportable Segments
NumberOfReportableSegments
1 segment
CY2019Q1 aon Numberof Revenue Lines
NumberofRevenueLines
5 revenue_line
CY2019Q1 us-gaap Number Of Reportable Segments
NumberOfReportableSegments
1 segment
CY2018Q4 aon Number Of Subsidiaries
NumberOfSubsidiaries
2 subsidiary
CY2019Q1 us-gaap Revenues
Revenues
3143000000 USD
CY2019Q1 us-gaap Labor And Related Expense
LaborAndRelatedExpense
1584000000 USD
CY2019Q1 us-gaap Information Technology And Data Processing
InformationTechnologyAndDataProcessing
117000000 USD
CY2019Q1 us-gaap Occupancy Net
OccupancyNet
87000000 USD
CY2019Q1 us-gaap Depreciation
Depreciation
40000000 USD
CY2019Q1 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
97000000 USD
CY2019Q1 aon Other General Expenses
OtherGeneralExpenses
346000000 USD
CY2019Q1 us-gaap Costs And Expenses
CostsAndExpenses
2271000000 USD
CY2019Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
872000000 USD
CY2019Q1 us-gaap Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
2000000 USD
CY2019Q1 us-gaap Interest Expense
InterestExpense
72000000 USD
CY2019Q1 aon Intercompany Interest Expense Income
IntercompanyInterestExpenseIncome
0 USD
CY2019Q1 aon Intercompany Other Income Expense Net
IntercompanyOtherIncomeExpenseNet
0 USD
CY2019Q1 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
0 USD
CY2019Q1 aon Income Loss From Continuing Operations Before Income Taxes
IncomeLossFromContinuingOperationsBeforeIncomeTaxes
802000000 USD
CY2019Q1 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
126000000 USD
CY2019Q1 us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
676000000 USD
CY2019Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
0 USD
CY2019Q1 aon Income Loss Before Equity Earnings Of Subsidiaries
IncomeLossBeforeEquityEarningsOfSubsidiaries
676000000 USD
CY2019Q1 aon Equity Earnings From Subsidiaries
EquityEarningsFromSubsidiaries
0 USD
CY2019Q1 us-gaap Profit Loss
ProfitLoss
676000000 USD
CY2019Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
17000000 USD
CY2019Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
659000000 USD
CY2018Q1 us-gaap Revenues
Revenues
3090000000 USD
CY2018Q1 us-gaap Labor And Related Expense
LaborAndRelatedExpense
1616000000 USD
CY2018Q1 us-gaap Information Technology And Data Processing
InformationTechnologyAndDataProcessing
115000000 USD
CY2018Q1 us-gaap Occupancy Net
OccupancyNet
93000000 USD
CY2018Q1 us-gaap Depreciation
Depreciation
39000000 USD
CY2018Q1 us-gaap Amortization Of Intangible Assets
AmortizationOfIntangibleAssets
110000000 USD
CY2018Q1 aon Other General Expenses
OtherGeneralExpenses
318000000 USD
CY2018Q1 us-gaap Costs And Expenses
CostsAndExpenses
2291000000 USD
CY2018Q1 us-gaap Operating Income Loss
OperatingIncomeLoss
799000000 USD
CY2018Q1 us-gaap Investment Income Interest And Dividend
InvestmentIncomeInterestAndDividend
4000000 USD
CY2018Q1 us-gaap Interest Expense
InterestExpense
70000000 USD
CY2018Q1 aon Intercompany Interest Expense Income
IntercompanyInterestExpenseIncome
0 USD
CY2018Q1 aon Intercompany Other Income Expense Net
IntercompanyOtherIncomeExpenseNet
0 USD
CY2018Q1 us-gaap Other Nonoperating Income Expense
OtherNonoperatingIncomeExpense
-15000000 USD
CY2018Q1 aon Income Loss From Continuing Operations Before Income Taxes
IncomeLossFromContinuingOperationsBeforeIncomeTaxes
718000000 USD
CY2018Q1 us-gaap Income Tax Expense Benefit
IncomeTaxExpenseBenefit
114000000 USD
CY2018Q1 us-gaap Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest
604000000 USD
CY2018Q1 us-gaap Income Loss From Discontinued Operations Net Of Tax
IncomeLossFromDiscontinuedOperationsNetOfTax
6000000 USD
CY2018Q1 aon Income Loss Before Equity Earnings Of Subsidiaries
IncomeLossBeforeEquityEarningsOfSubsidiaries
610000000 USD
CY2018Q1 aon Equity Earnings From Subsidiaries
EquityEarningsFromSubsidiaries
0 USD
CY2018Q1 us-gaap Profit Loss
ProfitLoss
610000000 USD
CY2018Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
16000000 USD
CY2018Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
594000000 USD
CY2019Q1 us-gaap Profit Loss
ProfitLoss
676000000 USD
CY2019Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
17000000 USD
CY2019Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
659000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
7000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
133000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-31000000 USD
CY2019Q1 us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
171000000 USD
CY2019Q1 aon Equity Other Comprehensive Income Loss From Subsidiaries
EquityOtherComprehensiveIncomeLossFromSubsidiaries
0 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
2000000 USD
CY2019Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
169000000 USD
CY2019Q1 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
828000000 USD
CY2018Q1 us-gaap Profit Loss
ProfitLoss
610000000 USD
CY2018Q1 us-gaap Net Income Loss Attributable To Noncontrolling Interest
NetIncomeLossAttributableToNoncontrollingInterest
16000000 USD
CY2018Q1 us-gaap Net Income Loss Available To Common Stockholders Basic
NetIncomeLossAvailableToCommonStockholdersBasic
594000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax
OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax
14000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax
OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax
247000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax
OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax
-48000000 USD
CY2018Q1 us-gaap Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest
309000000 USD
CY2018Q1 aon Equity Other Comprehensive Income Loss From Subsidiaries
EquityOtherComprehensiveIncomeLossFromSubsidiaries
0 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Noncontrolling Interest
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToNoncontrollingInterest
3000000 USD
CY2018Q1 us-gaap Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent
OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent
306000000 USD
CY2018Q1 us-gaap Comprehensive Income Net Of Tax
ComprehensiveIncomeNetOfTax
900000000 USD
CY2019Q1 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
600000000 USD
CY2019Q1 us-gaap Short Term Investments
ShortTermInvestments
134000000 USD
CY2019Q1 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
3242000000 USD
CY2019Q1 aon Fiduciary Assets
FiduciaryAssets
11412000000 USD
CY2019Q1 us-gaap Due From Related Parties Current
DueFromRelatedPartiesCurrent
0 USD
CY2019Q1 us-gaap Other Assets Current
OtherAssetsCurrent
531000000 USD
CY2019Q1 us-gaap Assets Current
AssetsCurrent
15919000000 USD
CY2019Q1 us-gaap Goodwill
Goodwill
8219000000 USD
CY2019Q1 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
1077000000 USD
CY2019Q1 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
606000000 USD
CY2019Q1 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
993000000 USD
CY2019Q1 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
588000000 USD
CY2019Q1 us-gaap Defined Benefit Plan Assets For Plan Benefits Noncurrent
DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
1224000000 USD
CY2019Q1 us-gaap Due From Related Parties Noncurrent
DueFromRelatedPartiesNoncurrent
0 USD
CY2019Q1 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
509000000 USD
CY2019Q1 aon Investments In Subsidiaries
InvestmentsInSubsidiaries
0 USD
CY2019Q1 us-gaap Assets
Assets
29135000000 USD
CY2019Q1 us-gaap Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
1479000000 USD
CY2019Q1 us-gaap Debt Current
DebtCurrent
426000000 USD
CY2019Q1 aon Fiduciary Liabilities
FiduciaryLiabilities
11412000000 USD
CY2019Q1 us-gaap Due To Related Parties Current
DueToRelatedPartiesCurrent
0 USD
CY2019Q1 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
1220000000 USD
CY2019Q1 us-gaap Liabilities Current
LiabilitiesCurrent
14537000000 USD
CY2019Q1 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
5990000000 USD
CY2019Q1 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
978000000 USD
CY2019Q1 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
205000000 USD
CY2019Q1 us-gaap Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
1590000000 USD
CY2019Q1 us-gaap Due To Related Parties Noncurrent
DueToRelatedPartiesNoncurrent
0 USD
CY2019Q1 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
973000000 USD
CY2019Q1 us-gaap Liabilities
Liabilities
24273000000 USD
CY2019Q1 us-gaap Stockholders Equity
StockholdersEquity
4775000000 USD
CY2019Q1 us-gaap Minority Interest
MinorityInterest
87000000 USD
CY2019Q1 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
4862000000 USD
CY2019Q1 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
29135000000 USD
CY2018Q4 us-gaap Cash And Cash Equivalents At Carrying Value
CashAndCashEquivalentsAtCarryingValue
656000000 USD
CY2018Q4 us-gaap Short Term Investments
ShortTermInvestments
172000000 USD
CY2018Q4 us-gaap Accounts Receivable Net Current
AccountsReceivableNetCurrent
2760000000 USD
CY2018Q4 aon Fiduciary Assets
FiduciaryAssets
10166000000 USD
CY2018Q4 us-gaap Due From Related Parties Current
DueFromRelatedPartiesCurrent
0 USD
CY2018Q4 us-gaap Other Assets Current
OtherAssetsCurrent
618000000 USD
CY2018Q4 us-gaap Assets Current
AssetsCurrent
14372000000 USD
CY2018Q4 us-gaap Goodwill
Goodwill
8171000000 USD
CY2018Q4 us-gaap Intangible Assets Net Excluding Goodwill
IntangibleAssetsNetExcludingGoodwill
1149000000 USD
CY2018Q4 us-gaap Property Plant And Equipment Net
PropertyPlantAndEquipmentNet
588000000 USD
CY2018Q4 us-gaap Deferred Income Tax Assets Net
DeferredIncomeTaxAssetsNet
561000000 USD
CY2018Q4 us-gaap Defined Benefit Plan Assets For Plan Benefits Noncurrent
DefinedBenefitPlanAssetsForPlanBenefitsNoncurrent
1133000000 USD
CY2018Q4 us-gaap Due From Related Parties Noncurrent
DueFromRelatedPartiesNoncurrent
0 USD
CY2018Q4 us-gaap Other Assets Noncurrent
OtherAssetsNoncurrent
448000000 USD
CY2018Q4 aon Investments In Subsidiaries
InvestmentsInSubsidiaries
0 USD
CY2018Q4 us-gaap Assets
Assets
26422000000 USD
CY2018Q4 us-gaap Accounts Payable And Accrued Liabilities Current
AccountsPayableAndAccruedLiabilitiesCurrent
1943000000 USD
CY2018Q4 us-gaap Debt Current
DebtCurrent
251000000 USD
CY2018Q4 aon Fiduciary Liabilities
FiduciaryLiabilities
10166000000 USD
CY2018Q4 us-gaap Due To Related Parties Current
DueToRelatedPartiesCurrent
0 USD
CY2018Q4 us-gaap Other Liabilities Current
OtherLiabilitiesCurrent
936000000 USD
CY2018Q4 us-gaap Liabilities Current
LiabilitiesCurrent
13296000000 USD
CY2018Q4 us-gaap Long Term Debt Noncurrent
LongTermDebtNoncurrent
5993000000 USD
CY2018Q4 us-gaap Deferred Income Tax Liabilities Net
DeferredIncomeTaxLiabilitiesNet
181000000 USD
CY2018Q4 us-gaap Pension And Other Postretirement And Postemployment Benefit Plans Liabilities Noncurrent
PensionAndOtherPostretirementAndPostemploymentBenefitPlansLiabilitiesNoncurrent
1636000000 USD
CY2018Q4 us-gaap Due To Related Parties Noncurrent
DueToRelatedPartiesNoncurrent
0 USD
CY2018Q4 us-gaap Other Liabilities Noncurrent
OtherLiabilitiesNoncurrent
1097000000 USD
CY2018Q4 us-gaap Liabilities
Liabilities
22203000000 USD
CY2018Q4 us-gaap Stockholders Equity
StockholdersEquity
4151000000 USD
CY2018Q4 us-gaap Minority Interest
MinorityInterest
68000000 USD
CY2018Q4 us-gaap Stockholders Equity Including Portion Attributable To Noncontrolling Interest
StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest
4219000000 USD
CY2018Q4 us-gaap Liabilities And Stockholders Equity
LiabilitiesAndStockholdersEquity
26422000000 USD
CY2019Q1 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
74000000 USD
CY2019Q1 us-gaap Proceeds From Sale And Maturity Of Other Investments
ProceedsFromSaleAndMaturityOfOtherInvestments
12000000 USD
CY2019Q1 us-gaap Payments To Acquire Other Investments
PaymentsToAcquireOtherInvestments
14000000 USD
CY2019Q1 aon Payments For Proceeds From Marketable Securities
PaymentsForProceedsFromMarketableSecurities
-41000000 USD
CY2019Q1 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
15000000 USD
CY2019Q1 us-gaap Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
6000000 USD
CY2019Q1 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
57000000 USD
CY2019Q1 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
-27000000 USD
CY2019Q1 us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
100000000 USD
CY2019Q1 us-gaap Increase Decrease In Due To Affiliates
IncreaseDecreaseInDueToAffiliates
0 USD
CY2019Q1 aon Proceeds Payment Towards Issuanceof Shares Under Incentiveand Sharebased Compensation Plans Netof Payments Relatedto Tax Withholdingfor Sharebased Compensation
ProceedsPaymentTowardsIssuanceofSharesUnderIncentiveandSharebasedCompensationPlansNetofPaymentsRelatedtoTaxWithholdingforSharebasedCompensation
-98000000 USD
CY2019Q1 us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
871000000 USD
CY2019Q1 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
694000000 USD
CY2019Q1 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
96000000 USD
CY2019Q1 us-gaap Payments To Minority Shareholders
PaymentsToMinorityShareholders
23000000 USD
CY2019Q1 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-140000000 USD
CY2019Q1 us-gaap Effect Of Exchange Rate On Cash And Cash Equivalents
EffectOfExchangeRateOnCashAndCashEquivalents
37000000 USD
CY2019Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
-56000000 USD
CY2018Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
656000000 USD
CY2019Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
600000000 USD
CY2018Q1 us-gaap Net Cash Provided By Used In Operating Activities
NetCashProvidedByUsedInOperatingActivities
140000000 USD
CY2018Q1 us-gaap Proceeds From Sale And Maturity Of Other Investments
ProceedsFromSaleAndMaturityOfOtherInvestments
17000000 USD
CY2018Q1 us-gaap Payments To Acquire Other Investments
PaymentsToAcquireOtherInvestments
11000000 USD
CY2018Q1 aon Payments For Proceeds From Marketable Securities
PaymentsForProceedsFromMarketableSecurities
-415000000 USD
CY2018Q1 us-gaap Payments To Acquire Businesses Net Of Cash Acquired
PaymentsToAcquireBusinessesNetOfCashAcquired
29000000 USD
CY2018Q1 us-gaap Proceeds From Divestiture Of Businesses Net Of Cash Divested
ProceedsFromDivestitureOfBusinessesNetOfCashDivested
-1000000 USD
CY2018Q1 us-gaap Payments To Acquire Property Plant And Equipment
PaymentsToAcquirePropertyPlantAndEquipment
45000000 USD
CY2018Q1 us-gaap Net Cash Provided By Used In Investing Activities
NetCashProvidedByUsedInInvestingActivities
346000000 USD
CY2018Q1 us-gaap Payments For Repurchase Of Common Stock
PaymentsForRepurchaseOfCommonStock
569000000 USD
CY2018Q1 us-gaap Increase Decrease In Due To Affiliates
IncreaseDecreaseInDueToAffiliates
0 USD
CY2018Q1 aon Proceeds Payment Towards Issuanceof Shares Under Incentiveand Sharebased Compensation Plans Netof Payments Relatedto Tax Withholdingfor Sharebased Compensation
ProceedsPaymentTowardsIssuanceofSharesUnderIncentiveandSharebasedCompensationPlansNetofPaymentsRelatedtoTaxWithholdingforSharebasedCompensation
-109000000 USD
CY2018Q1 us-gaap Proceeds From Issuance Of Long Term Debt
ProceedsFromIssuanceOfLongTermDebt
808000000 USD
CY2018Q1 us-gaap Repayments Of Long Term Debt
RepaymentsOfLongTermDebt
704000000 USD
CY2018Q1 us-gaap Payments Of Dividends Common Stock
PaymentsOfDividendsCommonStock
89000000 USD
CY2018Q1 us-gaap Payments To Minority Shareholders
PaymentsToMinorityShareholders
0 USD
CY2018Q1 us-gaap Net Cash Provided By Used In Financing Activities
NetCashProvidedByUsedInFinancingActivities
-663000000 USD
CY2018Q1 us-gaap Effect Of Exchange Rate On Cash And Cash Equivalents
EffectOfExchangeRateOnCashAndCashEquivalents
18000000 USD
CY2018Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect
-159000000 USD
CY2017Q4 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
756000000 USD
CY2018Q1 us-gaap Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents
597000000 USD
CY2019Q1 us-gaap Operating Lease Right Of Use Asset
OperatingLeaseRightOfUseAsset
993000000 USD
CY2019Q1 us-gaap Finance Lease Right Of Use Asset
FinanceLeaseRightOfUseAsset
70000000 USD
CY2019Q1 aon Operating Lease And Finance Lease Rightof Use Asset
OperatingLeaseAndFinanceLeaseRightofUseAsset
1063000000 USD
CY2019Q1 us-gaap Operating Lease Liability Current
OperatingLeaseLiabilityCurrent
214000000 USD
CY2019Q1 us-gaap Finance Lease Liability Current
FinanceLeaseLiabilityCurrent
27000000 USD
CY2019Q1 us-gaap Operating Lease Liability Noncurrent
OperatingLeaseLiabilityNoncurrent
978000000 USD
CY2019Q1 us-gaap Finance Lease Liability Noncurrent
FinanceLeaseLiabilityNoncurrent
50000000 USD
CY2019Q1 aon Operating And Finance Lease Liability
OperatingAndFinanceLeaseLiability
1269000000 USD
CY2019Q1 us-gaap Operating Lease Cost
OperatingLeaseCost
68000000 USD
CY2019Q1 us-gaap Finance Lease Right Of Use Asset Amortization
FinanceLeaseRightOfUseAssetAmortization
7000000 USD
CY2019Q1 us-gaap Finance Lease Interest Expense
FinanceLeaseInterestExpense
1000000 USD
CY2019Q1 us-gaap Variable Lease Cost
VariableLeaseCost
6000000 USD
CY2019Q1 us-gaap Short Term Lease Cost
ShortTermLeaseCost
1000000 USD
CY2019Q1 us-gaap Sublease Income
SubleaseIncome
8000000 USD
CY2019Q1 us-gaap Lease Cost
LeaseCost
75000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
LesseeOperatingLeaseLiabilityPaymentsRemainderOfFiscalYear
206000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Remainder Of Fiscal Year
FinanceLeaseLiabilityPaymentsRemainderOfFiscalYear
26000000 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received Remainder Of Fiscal Year
LessorOperatingLeasePaymentsToBeReceivedRemainderOfFiscalYear
26000000 USD
CY2019Q1 aon Finance And Operating Lease Liability Payments Net Of Sublease Income Remainder Of Fiscal Year
FinanceAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeRemainderOfFiscalYear
206000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Due Year Two
LesseeOperatingLeaseLiabilityPaymentsDueYearTwo
244000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Due Year Two
FinanceLeaseLiabilityPaymentsDueYearTwo
27000000 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received Two Years
LessorOperatingLeasePaymentsToBeReceivedTwoYears
31000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Payments Net Of Sublease Income Due Year Two
FinancingAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearTwo
240000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Due Year Three
LesseeOperatingLeaseLiabilityPaymentsDueYearThree
217000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Due Year Three
FinanceLeaseLiabilityPaymentsDueYearThree
23000000 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received Three Years
LessorOperatingLeasePaymentsToBeReceivedThreeYears
31000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Payments Net Of Sublease Income Due Year Three
FinancingAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearThree
209000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Due Year Four
LesseeOperatingLeaseLiabilityPaymentsDueYearFour
192000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Due Year Four
FinanceLeaseLiabilityPaymentsDueYearFour
2000000 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received Four Years
LessorOperatingLeasePaymentsToBeReceivedFourYears
32000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Payments Net Of Sublease Income Due Year Four
FinancingAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearFour
162000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Due Year Five
LesseeOperatingLeaseLiabilityPaymentsDueYearFive
138000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Due Year Five
FinanceLeaseLiabilityPaymentsDueYearFive
0 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received Five Years
LessorOperatingLeasePaymentsToBeReceivedFiveYears
14000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Payments Net Of Sublease Income Due Year Five
FinancingAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueYearFive
124000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Due After Year Five
LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive
494000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Payments Net Of Sublease Income Due
FinancingAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDue
1431000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Due After Year Five
FinanceLeaseLiabilityPaymentsDueAfterYearFive
0 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received Thereafter
LessorOperatingLeasePaymentsToBeReceivedThereafter
4000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Payments Net Of Sublease Income Due After Year Five
FinancingAndOperatingLeaseLiabilityPaymentsNetOfSubleaseIncomeDueAfterYearFive
490000000 USD
CY2019Q1 us-gaap Lessee Operating Lease Liability Payments Due
LesseeOperatingLeaseLiabilityPaymentsDue
1491000000 USD
CY2019Q1 us-gaap Finance Lease Liability Payments Due
FinanceLeaseLiabilityPaymentsDue
78000000 USD
CY2019Q1 us-gaap Lessor Operating Lease Payments To Be Received
LessorOperatingLeasePaymentsToBeReceived
138000000 USD
CY2019Q1 aon Financing And Operating Lease Liability Net Of Sublease Income
FinancingAndOperatingLeaseLiabilityNetOfSubleaseIncome
1269000000 USD
CY2019Q1 us-gaap Operating Lease Weighted Average Remaining Lease Term1
OperatingLeaseWeightedAverageRemainingLeaseTerm1
P8Y
CY2019Q1 us-gaap Finance Lease Weighted Average Remaining Lease Term1
FinanceLeaseWeightedAverageRemainingLeaseTerm1
P2Y8M12D
CY2019Q1 us-gaap Lessee Operating Lease Discount Rate
LesseeOperatingLeaseDiscountRate
0.033
CY2019Q1 us-gaap Lessee Operating Lease Liability Undiscounted Excess Amount
LesseeOperatingLeaseLiabilityUndiscountedExcessAmount
161000000 USD
CY2019Q1 us-gaap Finance Lease Liability Undiscounted Excess Amount
FinanceLeaseLiabilityUndiscountedExcessAmount
1000000 USD
CY2019Q1 aon Sublease Income Imputed Interest
SubleaseIncomeImputedInterest
0 USD
CY2019Q1 aon Financing And Operating Lease Liability Net Of Sublease Income Undiscounted Excess Amount
FinancingAndOperatingLeaseLiabilityNetOfSubleaseIncomeUndiscountedExcessAmount
162000000 USD
CY2019Q1 us-gaap Operating Lease Liability
OperatingLeaseLiability
1330000000 USD
CY2019Q1 us-gaap Finance Lease Liability
FinanceLeaseLiability
77000000 USD
CY2019Q1 aon Sublease Income Net
SubleaseIncomeNet
138000000 USD
CY2019Q1 us-gaap Lessee Finance Lease Discount Rate
LesseeFinanceLeaseDiscountRate
0.025
CY2019Q1 us-gaap Operating Lease Payments
OperatingLeasePayments
52000000 USD
CY2019Q1 us-gaap Right Of Use Asset Obtained In Exchange For Operating Lease Liability
RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability
26000000 USD

Files In Submission

Name View Source Status
0001628280-19-004829-index-headers.html Edgar Link pending
0001628280-19-004829-index.html Edgar Link pending
0001628280-19-004829.txt Edgar Link pending
0001628280-19-004829-xbrl.zip Edgar Link pending
a311certificationofceo.htm Edgar Link pending
a312certificationofcfo.htm Edgar Link pending
a321certificationofceo.htm Edgar Link pending
a322certificationofcfo.htm Edgar Link pending
aon-20190331.xsd Edgar Link pending
aon-20190331_cal.xml Edgar Link unprocessable
aon-20190331_def.xml Edgar Link unprocessable
aon-20190331_lab.xml Edgar Link unprocessable
aon-20190331_pre.xml Edgar Link unprocessable
ex101leadershipperform.htm Edgar Link pending
ex103facilityextension.htm Edgar Link pending
exhibit102formofrsuagr.htm Edgar Link pending
FilingSummary.xml Edgar Link unprocessable
Financial_Report.xlsx Edgar Link pending
MetaLinks.json Edgar Link pending
q12019aonplc.htm Edgar Link pending
q12019aonplc_htm.xml Edgar Link completed
R1.htm Edgar Link pending
R10.htm Edgar Link pending
R11.htm Edgar Link pending
R12.htm Edgar Link pending
R13.htm Edgar Link pending
R14.htm Edgar Link pending
R15.htm Edgar Link pending
R16.htm Edgar Link pending
R17.htm Edgar Link pending
R18.htm Edgar Link pending
R19.htm Edgar Link pending
R2.htm Edgar Link pending
R20.htm Edgar Link pending
R21.htm Edgar Link pending
R22.htm Edgar Link pending
R23.htm Edgar Link pending
R24.htm Edgar Link pending
R25.htm Edgar Link pending
R26.htm Edgar Link pending
R27.htm Edgar Link pending
R28.htm Edgar Link pending
R29.htm Edgar Link pending
R3.htm Edgar Link pending
R30.htm Edgar Link pending
R31.htm Edgar Link pending
R32.htm Edgar Link pending
R33.htm Edgar Link pending
R34.htm Edgar Link pending
R35.htm Edgar Link pending
R36.htm Edgar Link pending
R37.htm Edgar Link pending
R38.htm Edgar Link pending
R39.htm Edgar Link pending
R4.htm Edgar Link pending
R40.htm Edgar Link pending
R41.htm Edgar Link pending
R42.htm Edgar Link pending
R43.htm Edgar Link pending
R44.htm Edgar Link pending
R45.htm Edgar Link pending
R46.htm Edgar Link pending
R47.htm Edgar Link pending
R48.htm Edgar Link pending
R49.htm Edgar Link pending
R5.htm Edgar Link pending
R50.htm Edgar Link pending
R51.htm Edgar Link pending
R52.htm Edgar Link pending
R53.htm Edgar Link pending
R54.htm Edgar Link pending
R55.htm Edgar Link pending
R56.htm Edgar Link pending
R57.htm Edgar Link pending
R58.htm Edgar Link pending
R59.htm Edgar Link pending
R6.htm Edgar Link pending
R60.htm Edgar Link pending
R61.htm Edgar Link pending
R62.htm Edgar Link pending
R63.htm Edgar Link pending
R64.htm Edgar Link pending
R65.htm Edgar Link pending
R66.htm Edgar Link pending
R67.htm Edgar Link pending
R68.htm Edgar Link pending
R69.htm Edgar Link pending
R7.htm Edgar Link pending
R70.htm Edgar Link pending
R71.htm Edgar Link pending
R72.htm Edgar Link pending
R73.htm Edgar Link pending
R74.htm Edgar Link pending
R75.htm Edgar Link pending
R76.htm Edgar Link pending
R77.htm Edgar Link pending
R78.htm Edgar Link pending
R79.htm Edgar Link pending
R8.htm Edgar Link pending
R80.htm Edgar Link pending
R81.htm Edgar Link pending
R82.htm Edgar Link pending
R83.htm Edgar Link pending
R84.htm Edgar Link pending
R85.htm Edgar Link pending
R86.htm Edgar Link pending
R87.htm Edgar Link pending
R88.htm Edgar Link pending
R89.htm Edgar Link pending
R9.htm Edgar Link pending
R90.htm Edgar Link pending
R91.htm Edgar Link pending
R92.htm Edgar Link pending
R93.htm Edgar Link pending
R94.htm Edgar Link pending
report.css Edgar Link pending
Show.js Edgar Link pending