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v2.4.1.9

Debt (Details) | 3 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2015 Commercial paper [Member] USD ($) | Dec. 31, 2014 Commercial paper [Member] USD ($) | Dec. 31, 2014 Domestic Line of Credit [Member] 2017 Facility [Member] Line of Credit [Member] USD ($) | Mar. 31, 2015 Foreign Line of Credit [Member] 2015 Facility [Member] Line of Credit [Member] USD ($) | Dec. 31, 2014 Foreign Line of Credit [Member] 2015 Facility [Member] Line of Credit [Member] EUR (€) | Feb. 02, 2015 Foreign Line of Credit [Member] 2020 Facility [Member] Line of Credit [Member] USD ($) | Mar. 31, 2015 Commercial paper [Member] US Commercial Paper Program [Member] USD ($) | Mar. 31, 2015 Commercial paper [Member] European Multi Currency Paper Program [Member] EUR (€)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  | $ 400,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_DomesticLineOfCreditMember / us-gaap_DebtInstrumentAxis = aon_A2017FacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 707,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_ForeignLineOfCreditMember / us-gaap_DebtInstrumentAxis = aon_A2015FacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | € 650,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_ForeignLineOfCreditMember / us-gaap_DebtInstrumentAxis = aon_A2015FacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_CreditFacilityAxis = us-gaap_ForeignLineOfCreditMember / us-gaap_DebtInstrumentAxis = aon_A2020FacilityMember / us-gaap_LongtermDebtTypeAxis = us-gaap_LineOfCreditMember | $ 900,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = aon_USCommercialPaperProgramMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember | € 300,000,000 us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity / us-gaap_DebtInstrumentAxis = aon_EuropeanMultiCurrencyPaperProgramMember / us-gaap_ShortTermDebtTypeAxis = us-gaap_CommercialPaperMember
Total debt | 355,000,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CommercialPaperMember | 168,000,000 us-gaap_DebtAndCapitalLeaseObligations / us-gaap_LongtermDebtTypeAxis = us-gaap_CommercialPaperMember |  |  |  |  |  |
Weighted average commercial paper outstanding | $ 317,000,000 us-gaap_ShorttermDebtAverageOutstandingAmount / us-gaap_LongtermDebtTypeAxis = us-gaap_CommercialPaperMember |  |  |  |  |  |  |
Weighted-average interest rates (as a percent) | 0.50%aon_ShortTermDebtAverageOutstandingAmountWeightedAverageInterestRate / us-gaap_LongtermDebtTypeAxis = us-gaap_CommercialPaperMember |  |  |  |  |  |  |

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- Definition Reflects the calculation as of the balance sheet date of the average interest rate weighted by the average outstanding amount of short-term debt outstanding by type or by instrument at that time. + References No definition available. + Details
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- Definition Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03.16) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03.13,16) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition For the form of debt having an initial term of less than one year or less than the normal operating cycle, if longer, average borrowings during the period. + References No definition available. + Details
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