Segment Information (Tables)

3 Months Ended

Mar. 31, 2022

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

Financial information relating to our segments for the three-month periods ended March 31, 2022 and 2021 is as follows (in millions):

	Three-month period ended March 31,
	2022			2021
Brokerage
Total revenues	$	2,122.6		$	1,610.2
Earnings before income taxes	$	618.4		$	480.3
Identifiable assets at March 31, 2022 and 2021	$	39,590.1		$	21,242.3
Risk Management
Total revenues	$	289.9		$	252.7
Earnings before income taxes	$	32.3		$	24.1
Identifiable assets at March 31, 2022 and 2021	$	1,047.4		$	1,028.1
Corporate
Total revenues	$	22.8		$	302.1
Loss before income taxes	$	(113.0	)	$	(96.0	)
Identifiable assets at March 31, 2022 and 2021	$	2,524.0		$	2,144.1
Total
Total revenues	$	2,435.3		$	2,165.0
Earnings before income taxes	$	537.7		$	408.4
Identifiable assets at March 31, 2022 and 2021	$	43,161.5		$	24,414.5

Summary of Revenues by Type and Segment

Revenues by type and segment for the three-month period ended March 31, 2022 are as follows (in millions):

			Risk
	Brokerage		Management		Corporate		Total
Revenues:
Commissions	$	1,565.3	$	—	$	—	$	1,565.3
Fees		391.9		259.0		—		650.9
Supplemental revenues		74.3		—		—		74.3
Contingent revenues		71.6		—		—		71.6
Investment income		18.1		0.1		—		18.2
Net gains on divestitures		1.4		—		—		1.4
Revenues from clean coal activities		—		—		22.7		22.7
Other net revenues		—		—		0.1		0.1
Revenues before reimbursements		2,122.6		259.1		22.8		2,404.5
Reimbursements		—		30.8		—		30.8
Total revenues	$	2,122.6	$	289.9	$	22.8	$	2,435.3

Revenues by type and segment for the three-month period ended March 31, 2021 are as follows (in millions):

			Risk
	Brokerage		Management		Corporate		Total
Revenues:
Commissions	$	1,125.4	$	—	$	—	$	1,125.4
Fees		333.6		220.2		—		553.8
Supplemental revenues		66.8		—		—		66.8
Contingent revenues		63.3		—		—		63.3
Investment income		17.0		0.1		—		17.1
Net gains on divestitures		4.1		—		—		4.1
Revenues from clean coal activities		—		—		300.6		300.6
Other net revenues		—		—		1.5		1.5
Revenues before reimbursements		1,610.2		220.3		302.1		2,132.6
Reimbursements		—		32.4		—		32.4
Total revenues	$	1,610.2	$	252.7	$	302.1	$	2,165.0

Summary of Geographical Location and Segment

Revenues by geographical location and segment for the three-month period ended March 31, 2022 are as follows (in millions):

			Risk
	Brokerage		Management		Corporate		Total
Revenues:
United States	$	1,336.7	$	242.3	$	22.8	$	1,601.8
United Kingdom		440.2		11.0		—		451.2
Australia		59.0		31.7		—		90.7
Canada		87.5		1.4		—		88.9
New Zealand		34.4		3.5		—		37.9
Other foreign		164.8		—		—		164.8
Total revenues	$	2,122.6	$	289.9	$	22.8	$	2,435.3

Revenues by geographical location and segment for the three-month period ended March 31, 2021 are as follows (in millions):

			Risk
	Brokerage		Management		Corporate		Total
Revenues:
United States	$	1,106.6	$	207.5	$	302.1	$	1,616.2
United Kingdom		292.4		11.1		—		303.5
Australia		54.0		29.0		—		83.0
Canada		67.5		1.4		—		68.9
New Zealand		32.5		3.7		—		36.2
Other foreign		57.2		—		—		57.2
Total revenues	$	1,610.2	$	252.7	$	302.1	$	2,165.0