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Segment Information (Tables)

3 Months Ended

Mar. 31, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

		Three-month period
		ended March 31,
		2019				2018
Brokerage
Total revenues		$	1,381.9			$	1,195.6
Earnings before income taxes		$	412.4			$	318.9
Identifiable assets at March 31, 2019 and 2018		$	15,981.8			$	13,784.2
Risk Management
Total revenues		$	236.4			$	229.9
Earnings before income taxes		$	22.0			$	21.6
Identifiable assets at March 31, 2019 and 2018		$	806.6			$	735.9
Corporate
Total revenues		$	372.3			$	412.2
Loss before income taxes		$	(112.6	)		$	(98.2	)
Identifiable assets at March 31, 2019 and 2018		$	1,843.0			$	1,607.4

Summary of Revenues by Type and Segment

Revenues by type and segment for the three-month period ended March 31, 2019 are as follows (in millions):

		Brokerage				Risk Management				Corporate				Total
Revenues:
Commissions		$	940.4			$	—			$	—			$	940.4
Fees			261.8				202.9				—				464.7
Supplemental revenues			56.7				—				—				56.7
Contingent revenues			48.0				—				—				48.0
Investment income			17.9				0.4				—				18.3
Net gains on divestitures			57.1				—				—				57.1
Revenues from clean coal activities			—				—				372.3				372.3
Revenues before reimbursements			1,381.9				203.3				372.3				1,957.5
Reimbursements			—				33.1				—				33.1
Total revenues		$	1,381.9			$	236.4			$	372.3			$	1,990.6

Revenues by type and segment for the three-month period ended March 31, 2018 are as follows (in millions):

		Brokerage				Risk Management				Corporate				Total
Revenues:
Commissions		$	839.4			$	—			$	—			$	839.4
Fees			253.2				194.9				—				448.1
Supplemental revenues			52.0				—				—				52.0
Contingent revenues			34.9				—				—				34.9
Investment income			13.2				0.2				—				13.4
Net gains on divestitures			2.9				—				—				2.9
Revenues from clean coal activities			—				—				412.2				412.2
Revenues before reimbursements			1,195.6				195.1				412.2				1,802.9
Reimbursements			—				34.8				—				34.8
Total revenues		$	1,195.6			$	229.9			$	412.2			$	1,837.7

Summary of Geographical Location and Segment

Revenues by geographical location and segment for the three-month period ended March 31, 2019 are as follows (in millions):

		Brokerage				Risk Management				Corporate				Total
Revenues:
United States		$	1,006.5			$	198.5			$	372.3			$	1,577.3
United Kingdom			203.6				10.2				—				213.8
Australia			46.0				22.5				—				68.5
Canada			57.3				1.2				—				58.5
New Zealand			30.3				4.0				—				34.3
Other foreign			38.2				—				—				38.2
Total revenues		$	1,381.9			$	236.4			$	372.3			$	1,990.6

Revenues by geographical location and segment for the three-month period ended March 31, 2018 are as follows (in millions):

		Brokerage				Risk Management				Corporate				Total
Revenues:
United States		$	852.8			$	192.7			$	412.2			$	1,457.7
United Kingdom			191.0				9.0				—				200.0
Australia			43.6				23.7				—				67.3
Canada			42.8				1.0				—				43.8
New Zealand			30.1				3.5				—				33.6
Other foreign			35.3				—				—				35.3
Total revenues		$	1,195.6			$	229.9			$	412.2			$	1,837.7

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