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Document and Entity Information | Apr. 16, 2024
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Entity Listings [Line Items] |
Document Type | 8-K
Amendment Flag | false
Document Period End Date | Apr. 16, 2024
Entity File Number | 001-07933
Entity Registrant Name | Aon plc
Entity Central Index Key | 0000315293
Entity Incorporation, State or Country Code | L2
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
Local Phone Number | 1 266 6000
Entity Emerging Growth Company | false
Written Communications | false
Soliciting Material | false
Pre-commencement Tender Offer | false
Pre-commencement Issuer Tender Offer | false
Common Class A [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Class A Ordinary Shares, $0.01 nominal value
Trading Symbol | AON
Security Exchange Name | NYSE
Guarantees of Aon plc's 3.500% Senior Notes due 2024 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon plc's 3.500% Senior Notes due 2024
Trading Symbol | AON24
Security Exchange Name | NYSE
Guarantees of Aon plc's 3.875% Senior Notes due 2025 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon plc's 3.875% Senior Notes due 2025
Trading Symbol | AON25
Security Exchange Name | NYSE
Guarantees of Aon plc's 2.875% Senior Notes due 2026 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | 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 plc's 2.850% Senior Notes due 2027 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon Corporation and Aon Global Holdings plc's 2.850% Senior Notes due 2027
Trading Symbol | AON27
Security Exchange Name | NYSE
Guarantees of Aon Corporation and Aon Global Holdings plc's 2.050% Senior Notes due 2031 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon Corporation and Aon Global Holdings plc's 2.050% Senior Notes due 2031
Trading Symbol | AON31
Security Exchange Name | NYSE
Guarantees of Aon Corporation and Aon Global Holdings plc's 2.600% Senior Notes due 2031 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon Corporation and Aon Global Holdings plc's 2.600% Senior Notes due 2031
Trading Symbol | AON31A
Security Exchange Name | NYSE
Guarantee of Aon Corporation and Aon Global Holdings plc's 5.000% Senior Notes due 2032 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantee of Aon Corporation and Aon Global Holdings plc's 5.000% Senior Notes due 2032
Trading Symbol | AON32
Security Exchange Name | NYSE
Guarantees of Aon Corporation and Aon Global Holdings plc's 5.350% Senior Notes due 2033 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon Corporation and Aon Global Holdings plc's 5.350% Senior Notes due 2033
Trading Symbol | AON33
Security Exchange Name | NYSE
Guarantees of Aon plc's 4.250% Senior Notes due 2042 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon plc's 4.250% Senior Notes due 2042
Trading Symbol | AON42
Security Exchange Name | NYSE
Guarantees of Aon plc's 4.450% Senior Notes due 2043 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon plc's 4.450% Senior Notes due 2043
Trading Symbol | AON43
Security Exchange Name | NYSE
Guarantees of Aon plc's 4.600% Senior Notes due 2044 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon plc's 4.600% Senior Notes due 2044
Trading Symbol | AON44
Security Exchange Name | NYSE
Guarantees of Aon plc's 4.750% Senior Notes due 2045 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon plc's 4.750% Senior Notes due 2045
Trading Symbol | AON45
Security Exchange Name | NYSE
Guarantees of Aon Corporation and Aon Global Holdings plc's 2.900% Senior Notes due 2051 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon Corporation and Aon Global Holdings plc's 2.900% Senior Notes due 2051
Trading Symbol | AON51
Security Exchange Name | NYSE
Guarantees of Aon Corporation and Aon Global Holdings plc's 3.900% Senior Notes due 2052 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon Corporation and Aon Global Holdings plc's 3.900% Senior Notes due 2052
Trading Symbol | AON52
Security Exchange Name | NYSE
Guarantees of Aon North America, Inc.'s 5.125% Senior Notes due 2027 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon North America, Inc.'s 5.125% Senior Notes due 2027
Trading Symbol | AON27B
Security Exchange Name | NYSE
Guarantees of Aon North America, Inc.'s 5.150% Senior Notes due 2029 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon North America, Inc.'s 5.150% Senior Notes due 2029
Trading Symbol | AON29
Security Exchange Name | NYSE
Guarantees of Aon North America, Inc.'s 5.300% Senior Notes due 2031 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon North America, Inc.'s 5.300% Senior Notes due 2031
Trading Symbol | AON31B
Security Exchange Name | NYSE
Guarantees of Aon North America, Inc.'s 5.450% Senior Notes due 2034 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon North America, Inc.'s 5.450% Senior Notes due 2034
Trading Symbol | AON34
Security Exchange Name | NYSE
Guarantees of Aon North America, Inc.'s 5.750% Senior Notes due 2054 [Member] |
Entity Listings [Line Items] |
Title of 12(b) Security | Guarantees of Aon North America, Inc.'s 5.750% Senior Notes due 2054
Trading Symbol | AON54
Security Exchange Name | NYSE

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