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Segment Information (Tables)

3 Months Ended

Mar. 31, 2024

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

Financial information relating to our segments for the three-month periods ended March 31, 2024 and 2023 as follows

(in millions):

	Three-month period ended March 31,
	2024				2023
Brokerage
Total revenues	$	2,864.9			$	2,375.2
Earnings before income taxes	$	876.1			$	690.9
Identifiable assets at March 31, 2024 and 2023	$	56,371.6			$	40,919.9
Risk Management
Total revenues	$	391.4			$	330.8
Earnings before income taxes	$	53.2			$	45.5
Identifiable assets at March 31, 2024 and 2023	$	1,673.5			$	1,126.7
Corporate
Total revenues	$	0.4			$	0.1
Loss before income taxes	$	(156.6	)		$	(130.6	)
Identifiable assets at March 31, 2024 and 2023	$	2,930.8			$	3,047.8
Total
Total revenues	$	3,256.7			$	2,706.1
Earnings before income taxes	$	772.7			$	605.8
Identifiable assets at March 31, 2024 and 2023	$	60,975.9			$	45,094.4

Summary of Revenues by Type and Segment

Revenues by type and segment for the three-month period ended March 31, 2024 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	1,993.6			$	—			$	—			$	1,993.6
Fees			606.7				344.5				—				951.2
Supplemental revenues			93.9				—				—				93.9
Contingent revenues			86.0				—				—				86.0
Interest income, premium finance revenues and other income			84.7				8.3				0.4				93.4
Revenues before reimbursements			2,864.9				352.8				0.4				3,218.1
Reimbursements			—				38.6				—				38.6
Total revenues		$	2,864.9			$	391.4			$	0.4			$	3,256.7

Revenues by type and segment for the three-month period ended March 31, 2023 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	1,747.4			$	—			$	—			$	1,747.4
Fees			412.7				293.0				—				705.7
Supplemental revenues			81.6				—				—				81.6
Contingent revenues			71.8				—				—				71.8
Interest income, premium finance revenues and other income			61.7				4.6				—				66.3
Other net revenues			—				—				0.1				0.1
Revenues before reimbursements			2,375.2				297.6				0.1				2,672.9
Reimbursements			—				33.2				—				33.2
Total revenues		$	2,375.2			$	330.8			$	0.1			$	2,706.1

Summary of Geographical Location and Segment

Revenues by geographical location and segment for the three-month period ended March 31, 2024 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
United States		$	1,814.0			$	320.5			$	0.4			$	2,134.9
United Kingdom			584.8				14.0				—				598.8
Australia			68.0				53.0				—				121.0
Canada			103.1				1.7				—				104.8
New Zealand			41.7				2.2				—				43.9
Other foreign			253.3				—				—				253.3
Total revenues		$	2,864.9			$	391.4			$	0.4			$	3,256.7

Revenues by geographical location and segment for the three-month period ended March 31, 2023 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
United States		$	1,475.3			$	280.1			$	0.1			$	1,755.5
United Kingdom			513.5				11.3				—				524.8
Australia			64.2				34.0				—				98.2
Canada			93.7				1.5				—				95.2
New Zealand			38.0				3.9				—				41.9
Other foreign			190.5				—				—				190.5
Total revenues		$	2,375.2			$	330.8			$	0.1			$	2,706.1

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-Name Accounting Standards Codification
-Topic 280
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-Section 50
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