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Accelerating Aon United Program (Tables) | 3 Months Ended
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Mar. 31, 2025
Restructuring and Related Activities [Abstract] |
Schedule of Restructuring Liabilities for the Program | The changes in the Company’s liabilities for the Program as of March 31, 2025 are as follows (in millions):
| Technology and other |  | Workforce optimization |  | Asset impairments |  | Total
Liability balance as of December 31, 2024 | $ | 17 |  |  | $ | 97 |  |  | $ | — |  |  | $ | 114 |
Charges | 56 |  |  | 51 |  |  | 3 |  |  | 110 |
Cash payments | (45) |  |  | (52) |  |  | — |  |  | (97) |
Foreign currency translation and other | — |  |  | — |  |  | — |  |  | — |
Non-cash charges (1) | (2) |  |  | (14) |  |  | (3) |  |  | (19) |
Liability balance as of March 31, 2025 | $ | 26 |  |  | $ | 82 |  |  | $ | — |  |  | $ | 108 |
Total costs incurred from inception to date | $ | 196 |  |  | $ | 351 |  |  | $ | 87 |  |  | $ | 634 |
(1)During the three months ended March 31, 2025, the Company recognized $2 million of accelerated ROU asset amortization or impairments due to the Company’s decision to exit certain leased properties as a result of the Program. The amounts are presented in Technology and other, where the corresponding liability is reflected within Other current liabilities and Non-current operating lease liabilities, which will ultimately be settled in cash.
Restructuring and Related Costs | Total Program costs incurred for the three months ended March 31, 2025 and 2024 are as follows (in millions):
|  | Three Months Ended March 31, |  |
|  | 2025 |  | 2024 |  |  |  |
Risk Capital |  | $ | 19 |  |  | $ | 43 |  |  |  |  |
Human Capital |  | 4 |  |  | 11 |  |  |  |  |
Corporate |  | 87 |  |  | 65 |  |  |  |  |
Total |  | $ | 110 |  |  | $ | 119 |  |  |  |  |

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- Definition Tabular disclosure of costs incurred for restructuring including, but not limited to, exit and disposal activities, remediation, implementation, integration, asset impairment, and charges against earnings from the write-down of assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SAB Topic 5.P.3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-1 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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- Definition Tabular disclosure of an entity's restructuring reserve that occurred during the period associated with the exit from or disposal of business activities or restructurings for each major type of cost. This element may also include a description of any reversal and other adjustment made during the period to the amount of an accrued liability for restructuring activities. This element may be used to encapsulate the roll forward presentations of an entity's restructuring reserve by type of cost and in total, and explanation of changes that occurred in the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 420 -SubTopic 10 -Name Accounting Standards Codification -Section S99 -Paragraph 2 -Subparagraph (SAB Topic 5.P.4.b.2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479823/420-10-S99-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482017/420-10-50-1 + Details
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