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Acquisitions and Dispositions of Businesses (Tables) | 3 Months Ended
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Mar. 31, 2025
Business Combination, Asset Acquisition, and Joint Venture Formation [Abstract] |
Schedule of Consideration Transferred and Preliminary Value of Intangible Assets | The following table includes the preliminary fair values of consideration transferred, assets acquired, and liabilities assumed as a result of the Company’s acquisitions (in millions):
|  | Three Months Ended March 31, 2025
Consideration transferred: |  |
Cash (1) |  | $ | 605 |
Deferred and contingent consideration |  | 35 |
Aggregate consideration transferred |  | $ | 640 |
Assets acquired: |  |
Goodwill |  | 351 |
Intangible assets |  | 299 |
Other assets (2) |  | 125 |
Total assets acquired |  | 775 |
Liabilities assumed: |  |
Total liabilities assumed |  | 135 |
Net assets acquired |  | $ | 640 |
(1)Includes $416 million as of December 31, 2024 of consideration paid into an escrow account related to the acquisition of Griffiths & Armour, which closed on January 1, 2025. (2)Includes Cash and cash equivalents of $33 million and $41 million in funds held on behalf of clients. The following table includes these amounts recognized as a result of the Company’s acquisitions (in millions):
|  | Three Months Ended March 31, 2025
|  | NFP Acquisition |  |
Consideration transferred: |  |  |  |
Cash |  | $ | 3,247 |  |  |
Class A ordinary shares issued |  | 5,882 |  |  |
Aggregate consideration transferred |  | $ | 9,129 |  |  |
Assets acquired: |  |  |  |
Cash and cash equivalents |  | $ | 294 |  |  |
Receivables |  | 329 |  |  |
Fiduciary assets (1) |  | 411 |  |  |
Goodwill |  | 6,847 |  |  |
Other intangible assets: |  |  |  |
Customer-related and contract-based |  | 5,950 |  |  |
Tradenames |  | 800 |  |  |
Technology and other |  | 25 |  |  |
Operating lease right-of-use assets |  | 138 |  |  |
Current assets |  | 82 |  |  |
Non-current assets |  | 108 |  |  |
Total assets acquired |  | 14,984 |  |  |
Liabilities assumed: |  |  |  |
Accounts payable and accrued liabilities |  | $ | 284 |  |  |
Fiduciary liabilities |  | 411 |  |  |
Current liabilities |  | 242 |  |  |
Long-term debt |  | 3,422 |  |  |
Non-current operating lease liabilities |  | 125 |  |  |
Deferred tax liabilities (2) |  | 1,020 |  |  |
Non-current liabilities |  | 158 |  |  |
Total liabilities assumed |  | 5,662 |  |  |
Less: Fair value of redeemable noncontrolling interests (3) |  | (108) |  |  |
Less: Fair value of nonredeemable noncontrolling interests |  | (85) |  |  |
Net assets acquired |  | $ | 9,129 |  |  |
(1)Includes $277 million of funds held on behalf of clients. (2)As of March 31, 2025, the NFP deferred tax liability related to the U.S. has been netted with the Aon deferred tax asset related to the U.S. and presented as a net deferred tax asset on the Consolidated Statements of Financial Position. (3)The fair value of the noncontrolling interests acquired was estimated using a DCF model under the income approach and used estimated financial projections developed by management applying market participant assumptions.
Schedule of Pro Forma Information | The unaudited pro forma financial information is presented for informational purposes only and is not indicative of the results of operations that would have been achieved if the NFP Transaction had taken place on the date indicated or of results that may occur in the future (in millions):
|  | Three Months Ended March 31, |  |
|  | 2024 | 2023 |  |  |
Revenue |  | $ | 4,618 |  | $ | 4,370 |  |  |  |
Net income attributable to Aon shareholders |  | 936 |  | 842 |  |  |  |

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- Definition Tabular disclosure of pro forma results of operations for a material business acquisition or series of individually immaterial business acquisitions that are material in the aggregate. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(2) -SubTopic 10 -Topic 805 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (h)(3) -SubTopic 10 -Topic 805 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479328/805-10-50-2 + Details
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- Definition Tabular disclosure of the amounts recognized as of the acquisition date for each major class of assets acquired and liabilities assumed. May include but not limited to the following: (a) acquired receivables; (b) contingencies recognized at the acquisition date; and (c) the fair value of noncontrolling interests in the acquiree. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Paragraph 1 -Section 50 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-1 + Details
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