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Debt | 9 Months Ended
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Sep. 30, 2018
Debt Disclosure [Abstract] |
Debt | Debt Notes On March 8, 2018, the Company’s CAD 375 million ($291 million at March 8, 2018 Exchange Rates) 4.76% Senior Note due March 2018 issued by a Canadian subsidiary of Aon Corporation matured and was repaid in full. Revolving Credit Facilities As of September 30, 2018, Aon plc had two primary committed credit facilities outstanding: its $900 million multi-currency U.S. credit facility expiring in February 2021 (the “2021 Facility”) and its $400 million multi-currency U.S. credit facility expiring in October 2022 (the “2022 Facility”). Each of these facilities includes customary representations, warranties, and covenants, including financial covenants that require Aon to maintain specified ratios of adjusted consolidated earnings before interest, taxes, depreciation, and amortization (“EBITDA”) to consolidated interest expense and consolidated debt to adjusted consolidated EBITDA, in each case, tested quarterly. At September 30, 2018, Aon did not have borrowings under the 2021 Facility or the 2022 Facility, and was in compliance with the financial covenants and all other covenants contained therein during the rolling twelve months ended September 30, 2018. Commercial Paper Aon Corporation, a wholly owned subsidiary of Aon plc, has established a U.S. commercial paper program and Aon plc has established a European multi-currency commercial paper program (collectively, the “CP Programs”). Commercial paper may be issued in aggregate principal amounts of up to $600 million under the U.S. program and €525 million under the European program, not to exceed the amount of the Company’s committed credit, which was $1.3 billion at September 30, 2018. The U.S. commercial paper program is fully and unconditionally guaranteed by Aon plc and the European commercial paper program is fully and unconditionally guaranteed by Aon Corporation. Commercial paper outstanding, which is included in Short-term debt and current portion of long-term debt in the Company’s Condensed Consolidated Statements of Financial Position, is as follows (in millions):
As of |  | September 30, 2018 |  | December 31, 2017
Commercial paper outstanding |  | $ | 740 |  |  | $ | — |
The weighted average commercial paper outstanding and its related interest rates are as follows (in millions, except percentages):
|  | Three months ended September 30 |  | Nine months ended September 30
|  | 2018 |  | 2017 |  | 2018 |  | 2017
Weighted average commercial paper outstanding |  | $ | 820 |  |  | $ | — |  |  | $ | 566 |  |  | $ | 227 |
Weighted average interest rate of commercial paper outstanding |  | 0.79 | % |  | — | % |  | 0.83 | % |  | 0.18 | %

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- Definition The entire disclosure for information about short-term and long-term debt arrangements, which includes amounts of borrowings under each line of credit, note payable, commercial paper issue, bonds indenture, debenture issue, own-share lending arrangements and any other contractual agreement to repay funds, and about the underlying arrangements, rationale for a classification as long-term, including repayment terms, interest rates, collateral provided, restrictions on use of assets and activities, whether or not in compliance with debt covenants, and other matters important to users of the financial statements, such as the effects of refinancing and noncompliance with debt covenants. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -URI http://asc.fasb.org/topic&trid=2208564 + Details
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