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Segment Information (Tables)

6 Months Ended

Jun. 30, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

Financial information relating to our segments for the three and six-month periods ended June 30, 2021 and 2020 is as follows (in millions):

	Three-month period ended June 30,								Six-month period ended June 30,
	2021				2020				2021				2020
Brokerage
Total revenues	$	1,390.2			$	1,201.1			$	3,000.4			$	2,636.7
Earnings before income taxes	$	299.7			$	247.8			$	780.0			$	658.6
Identifiable assets at June 30, 2021 and 2020									$	21,858.6			$	18,405.6
Risk Management
Total revenues	$	281.7			$	223.2			$	534.4			$	472.7
Earnings before income taxes	$	33.4			$	13.2			$	57.5			$	38.8
Identifiable assets at June 30, 2021 and 2020									$	1,058.5			$	929.1
Corporate
Total revenues	$	261.6			$	159.7			$	563.7			$	341.5
Loss before income taxes	$	(110.8	)		$	(89.3	)		$	(206.8	)		$	(169.7	)
Identifiable assets at June 30, 2021 and 2020									$	4,900.1			$	1,971.5
Total
Total revenues	$	1,933.5			$	1,584.0			$	4,098.5			$	3,450.9
Earnings before income taxes	$	222.3			$	171.7			$	630.7			$	527.7
Identifiable assets at June 30, 2021 and 2020									$	27,817.2			$	21,306.2

Summary of Revenues by Type and Segment

Revenues by type and segment for the three-month period ended June 30, 2021 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	977.1			$	—			$	—			$	977.1
Fees			296.0				244.9				—				540.9
Supplemental revenues			55.2				—				—				55.2
Contingent revenues			43.3				—				—				43.3
Investment income			18.1				—				—				18.1
Net gains on divestitures			0.5				0.1				—				0.6
Revenues from clean coal activities			—				—				261.0				261.0
Other net revenues			—				—				0.6				0.6
Revenues before reimbursements			1,390.2				245.0				261.6				1,896.8
Reimbursements			—				36.7				—				36.7
Total revenues		$	1,390.2			$	281.7			$	261.6			$	1,933.5

Revenues by type and segment for the six-month period ended June 30, 2021 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	2,102.5			$	—			$	—			$	2,102.5
Fees			629.6				465.1				—				1,094.7
Supplemental revenues			122.0				—				—				122.0
Contingent revenues			106.6				—				—				106.6
Investment income			35.1				0.1				—				35.2
Net gains on divestitures			4.6				0.1				—				4.7
Revenues from clean coal activities			—				—				561.6				561.6
Other net revenues			—				—				2.1				2.1
Revenues before reimbursements			3,000.4				465.3				563.7				4,029.4
Reimbursements			—				69.1				—				69.1
Total revenues		$	3,000.4			$	534.4			$	563.7			$	4,098.5

Revenues by type and segment for the three-month period ended June 30, 2020 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	827.5			$	—			$	—			$	827.5
Fees			269.1				190.6				—				459.7
Supplemental revenues			50.3				—				—				50.3
Contingent revenues			37.4				—				—				37.4
Investment income			15.8				0.2				—				16.0
Net gains on divestitures			1.0				—				—				1.0
Revenues from clean coal activities			—				—				159.5				159.5
Other net revenues			—				—				0.2				0.2
Revenues before reimbursements			1,201.1				190.8				159.7				1,551.6
Reimbursements			—				32.4				—				32.4
Total revenues		$	1,201.1			$	223.2			$	159.7			$	1,584.0

Revenues by type and segment for the six-month period ended June 30, 2020 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	1,844.7			$	—			$	—			$	1,844.7
Fees			564.9				402.1				—				967.0
Supplemental revenues			109.3				—				—				109.3
Contingent revenues			82.5				—				—				82.5
Investment income			34.1				0.5				—				34.6
Net gains on divestitures			1.2				—				—				1.2
Revenues from clean coal activities			—				—				341.3				341.3
Other net revenues			—				—				0.2				0.2
Revenues before reimbursements			2,636.7				402.6				341.5				3,380.8
Reimbursements			—				70.1				—				70.1
Total revenues		$	2,636.7			$	472.7			$	341.5			$	3,450.9

Summary of Geographical Location and Segment

Revenues by geographical location and segment for the three-month period ended June 30, 2021 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
United States		$	812.4			$	231.5			$	261.6			$	1,305.5
United Kingdom			326.1				11.8				—				337.9
Australia			70.7				33.0				—				103.7
Canada			79.9				1.4				—				81.3
New Zealand			45.4				4.0				—				49.4
Other foreign			55.7				—				—				55.7
Total revenues		$	1,390.2			$	281.7			$	261.6			$	1,933.5

Revenues by geographical location and segment for the six-month period ended June 30, 2021 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
United States		$	1,919.0			$	439.0			$	563.7			$	2,921.7
United Kingdom			618.5				22.9				—				641.4
Australia			124.7				62.0				—				186.7
Canada			147.4				2.8				—				150.2
New Zealand			77.9				7.7				—				85.6
Other foreign			112.9				—				—				112.9
Total revenues		$	3,000.4			$	534.4			$	563.7			$	4,098.5

Revenues by type and segment for the six-month period ended June 30, 2020 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
Commissions		$	1,844.7			$	—			$	—			$	1,844.7
Fees			564.9				402.1				—				967.0
Supplemental revenues			109.3				—				—				109.3
Contingent revenues			82.5				—				—				82.5
Investment income			34.1				0.5				—				34.6
Net gains on divestitures			1.2				—				—				1.2
Revenues from clean coal activities			—				—				341.3				341.3
Other net revenues			—				—				0.2				0.2
Revenues before reimbursements			2,636.7				402.6				341.5				3,380.8
Reimbursements			—				70.1				—				70.1
Total revenues		$	2,636.7			$	472.7			$	341.5			$	3,450.9

Revenues by geographical location and segment for the three-month period ended June 30, 2020 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
United States		$	740.8			$	185.6			$	159.7			$	1,086.1
United Kingdom			260.9				8.2				—				269.1
Australia			56.9				24.7				—				81.6
Canada			58.2				1.5				—				59.7
New Zealand			38.0				3.2				—				41.2
Other foreign			46.3				—				—				46.3
Total revenues		$	1,201.1			$	223.2			$	159.7			$	1,584.0

Revenues by geographical location and segment for the six-month period ended June 30, 2020 are as follows (in millions):

						Risk
		Brokerage				Management				Corporate				Total
Revenues:
United States		$	1,746.7			$	398.3			$	341.5			$	2,486.5
United Kingdom			515.4				19.6				—				535.0
Australia			100.0				46.3				—				146.3
Canada			114.4				2.5				—				116.9
New Zealand			66.0				6.0				—				72.0
Other foreign			94.2				—				—				94.2
Total revenues		$	2,636.7			$	472.7			$	341.5			$	3,450.9

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