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Document and Entity Information | Oct. 19, 2023
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Document And Entity Information [Line Items] |
Amendment Flag | false
Entity Central Index Key | 0000315293
Document Type | 8-K
Document Period End Date | Oct. 19, 2023
Entity Registrant Name | Aon plc
Entity Incorporation State Country Code | L2
Entity File Number | 1-7933
Entity Tax Identification Number | 98-1539969
Entity Address, Address Line One | Metropolitan Building
Entity Address, Address Line Two | James Joyce Street
Entity Address, City or Town | Dublin 1
Entity Address, Country | IE
Entity Address, Postal Zip Code | D01 K0Y8
City Area Code | 353 1
Local Phone Number | 266 6000
Written Communications | false
Soliciting Material | false
Pre Commencement Tender Offer | false
Pre Commencement Issuer Tender Offer | false
Entity Emerging Growth Company | false
Common Class A [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Class A Ordinary Shares, $0.01 nominal value
Trading Symbol | AON
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 4.000 Senior Notes Due 2023 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 4.00% Senior Notes due 2023
Trading Symbol | AON23
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 3.500 Senior Notes Due 2024 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 3.50% Senior Notes due 2024
Trading Symbol | AON24
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 3.875 Senior Notes Due 2025 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 3.875% Senior Notes due 2025
Trading Symbol | AON25
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 2.875 Senior Notes Due 2026 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 2.875% Senior Notes due 2026
Trading Symbol | AON26
Security Exchange Name | NYSE
Guarantees Of Aon Corporation And Aon Global Holdings Plcs 285 Senior Notes Due 2027 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.85% Senior Notes due 2027
Trading Symbol | AON27
Security Exchange Name | NYSE
Guarantees Of Aon Corporation And Aon Global Holdings Plcs 2.05 Senior Notes Due 20312 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.05% Senior Notes due 2031
Trading Symbol | AON31
Security Exchange Name | NYSE
Guarantees Of Aon Corporation And Aon Global Holdings Plcs 2.60 Senior Notes Due 20311 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.60% Senior Notes due 2031
Trading Symbol | AON31A
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 500 Senior Notes Due 2032 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 5.00% Senior Notes due 2032
Trading Symbol | AON32
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 535 Senior Notes Due 2033 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 5.35% Senior Notes due 2033
Trading Symbol | AON33
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 4.250 Senior Notes Due 2042 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 4.25% Senior Notes due 2042
Trading Symbol | AON42
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 4.450 Senior Notes Due 2043 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 4.45% Senior Notes due 2043
Trading Symbol | AON43
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 4.600 Senior Notes Due 2044 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 4.60% Senior Notes due 2044
Trading Symbol | AON44
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 4.750 Senior Notes Due 2045 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon plc’s 4.75% Senior Notes due 2045
Trading Symbol | AON45
Security Exchange Name | NYSE
Guarantees Of Aon Plcs 290 Senior Notes Due 2051 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 2.90% Senior Notes due 2051
Trading Symbol | AON51
Security Exchange Name | NYSE
Guarantees Of Aon Corporation And Aon Global Holdings Plcs 390 Senior Notes Due 2052 [Member] |
Document And Entity Information [Line Items] |
Security 12b Title | Guarantees of Aon Corporation and Aon Global Holdings plc’s 3.90% Senior Notes due 2052
Trading Symbol | AON52
Security Exchange Name | NYSE

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