Segment Information (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information by Segment

Financial information relating to our segments for 2021, 2020 and 2019 is as follows (in millions):

Year Ended December 31, 2021	Brokerage			Risk Management		Corporate			Total
Revenues:
Commissions	$	4,132.3		$	—	$	—		$	4,132.3
Fees		1,296.9			967.2		—			2,264.1
Supplemental revenues		248.7			—		—			248.7
Contingent revenues		188.0			—		—			188.0
Investment income		82.8			0.3		—			83.1
Net gains on divestitures		18.8			0.1		—			18.9
Revenue from clean coal activities		—			—		1,140.8			1,140.8
Other net revenues		—			—		0.5			0.5
Revenues before reimbursements		5,967.5			967.6		1,141.3			8,076.4
Reimbursements		—			133.0		—			133.0
Total revenues		5,967.5			1,100.6		1,141.3			8,209.4
Compensation		3,252.4			580.7		94.4			3,927.5
Operating		757.9			209.8		104.7			1,072.4
Reimbursements		—			133.0		—			133.0
Cost of revenues from clean coal activities		—			—		1,173.2			1,173.2
Interest		—			—		226.1			226.1
Loss on extinguishment of debt		—			—		16.2			16.2
Depreciation		87.8			46.2		17.2			151.2
Amortization		407.6			7.5		—			415.1
Change in estimated acquisition earnout payables		116.3			3.3		—			119.6
Total expenses		4,622.0			980.5		1,631.8			7,234.3
Earnings (loss) before income taxes		1,345.5			120.1		(490.5	)		975.1
Provision (benefit) for income taxes		328.9			30.6		(339.4	)		20.1
Net earnings (loss)		1,016.6			89.5		(151.1	)		955.0
Net earnings attributable to noncontrolling interests		8.4			—		39.8			48.2
Net earnings (loss) attributable to controlling interests	$	1,008.2		$	89.5	$	(190.9	)	$	906.8
Net foreign exchange loss	$	(1.7	)	$	—	$	(0.6	)	$	(2.3	)
Revenues:
United States	$	3,804.8		$	910.7	$	1,141.3		$	5,856.8
United Kingdom		1,199.0			46.0		—			1,245.0
Australia		252.6			123.5		—			376.1
Canada		302.2			5.8		—			308.0
New Zealand		162.4			14.6		—			177.0
Other foreign		246.5			—		—			246.5
Total revenues	$	5,967.5		$	1,100.6	$	1,141.3		$	8,209.4
At December 31, 2021
Identifiable assets:
United States	$	15,548.3		$	790.7	$	2,489.6		$	18,828.6
United Kingdom		8,251.3			134.1		—			8,385.4
Australia		1,684.2			84.7		—			1,768.9
Canada		1,436.1			4.4		—			1,440.5
New Zealand		754.5			20.5		—			775.0
Other foreign		2,146.6			—		—			2,146.6
Total identifiable assets	$	29,821.0		$	1,034.4	$	2,489.6		$	33,345.0
Goodwill - net	$	8,544.6		$	100.9	$	20.7		$	8,666.2
Amortizable intangible assets - net		3,906.1			47.9		—			3,954.0

Year Ended December 31, 2020	Brokerage			Risk Management			Corporate			Total
Revenues:
Commissions	$	3,591.9		$	—		$	—		$	3,591.9
Fees		1,136.9			821.0			—			1,957.9
Supplemental revenues		221.9			—			—			221.9
Contingent revenues		147.0			—			—			147.0
Investment income		75.2			0.7			—			75.9
Net losses on divestitures		(5.8	)		—			—			(5.8	)
Revenue from clean coal activities		—			—			863.5			863.5
Other net losses		—			—			(0.4	)		(0.4	)
Revenues before reimbursements		5,167.1			821.7			863.1			6,851.9
Reimbursements		—			151.7			—			151.7
Total revenues		5,167.1			973.4			863.1			7,003.6
Compensation		2,882.5			517.5			66.5			3,466.5
Operating		687.2			162.6			56.7			906.5
Reimbursements		—			151.7			—			151.7
Cost of revenues from clean coal activities		—			—			882.1			882.1
Interest		—			—			196.4			196.4
Depreciation		73.5			49.4			22.2			145.1
Amortization		411.3			6.0			—			417.3
Change in estimated acquisition earnout payables		(29.7	)		(3.2	)		—			(32.9	)
Total expenses		4,024.8			884.0			1,223.9			6,132.7
Earnings (loss) before income taxes		1,142.3			89.4			(360.8	)		870.9
Provision (benefit) for income taxes		276.3			22.5			(286.0	)		12.8
Net earnings (loss)		866.0			66.9			(74.8	)		858.1
Net earnings attributable to noncontrolling interests		4.9			—			34.4			39.3
Net earnings (loss) attributable to controlling interests	$	861.1		$	66.9		$	(109.2	)	$	818.8
Net foreign exchange loss	$	(2.6	)	$	(0.1	)	$	(0.2	)	$	(2.9	)
Revenues:
United States	$	3,369.4		$	816.4		$	863.1		$	5,048.9
United Kingdom		993.7			40.7			—			1,034.4
Australia		216.1			98.4			—			314.5
Canada		243.8			5.3			—			249.1
New Zealand		141.8			12.6			—			154.4
Other foreign		202.3			—			—			202.3
Total revenues	$	5,167.1		$	973.4		$	863.1		$	7,003.6
At December 31, 2020
Identifiable assets:
United States	$	8,897.9		$	716.2		$	2,172.2		$	11,786.3
United Kingdom		6,135.1			139.2			—			6,274.3
Australia		1,373.3			89.6			—			1,462.9
Canada		1,053.6			4.8			—			1,058.4
New Zealand		766.0			24.1			—			790.1
Other foreign		959.4			—			—			959.4
Total identifiable assets	$	19,185.3		$	973.9		$	2,172.2		$	22,331.4
Goodwill - net	$	6,053.6		$	70.5		$	2.9		$	6,127.0
Amortizable intangible assets - net		2,376.3			23.6			—			2,399.9

Year Ended December 31, 2019	Brokerage			Risk Management			Corporate			Total
Revenues:
Commissions	$	3,320.6		$	—		$	—		$	3,320.6
Fees		1,074.2			836.9			—			1,911.1
Supplemental revenues		210.5			—			—			210.5
Contingent revenues		135.6			—			—			135.6
Investment income		85.3			1.6			—			86.9
Net gains on divestitures		75.3			—			—			75.3
Revenue from clean coal activities		—			—			1,319.3			1,319.3
Other net losses		—			—			(2.9	)		(2.9	)
Revenues before reimbursements		4,901.5			838.5			1,316.4			7,056.4
Reimbursements		—			138.6			—			138.6
Total revenues		4,901.5			977.1			1,316.4			7,195.0
Compensation		2,745.9			515.7			77.9			3,339.5
Operating		796.5			184.9			87.1			1,068.5
Reimbursements		—			138.6			—			138.6
Cost of revenues from clean coal activities		—			—			1,352.8			1,352.8
Interest		—			—			179.8			179.8
Depreciation		66.6			46.2			27.6			140.4
Amortization		329.1			4.9			—			334.0
Change in estimated acquisition earnout payables		16.9			(1.6	)		—			15.3
Total expenses		3,955.0			888.7			1,725.2			6,568.9
Earnings (loss) before income taxes		946.5			88.4			(408.8	)		626.1
Provision (benefit) for income taxes		229.2			22.2			(341.1	)		(89.7	)
Net earnings (loss)		717.3			66.2			(67.7	)		715.8
Net earnings attributable to noncontrolling interests		17.2			—			29.8			47.0
Net earnings (loss) attributable to controlling interests	$	700.1		$	66.2		$	(97.5	)	$	668.8
Net foreign exchange loss	$	(1.0	)	$	(0.1	)	$	(5.6	)	$	(6.7	)
Revenues:
United States	$	3,234.3		$	828.4		$	1,316.4		$	5,379.1
United Kingdom		921.8			41.6			—			963.4
Australia		211.3			87.3			—			298.6
Canada		221.4			4.6			—			226.0
New Zealand		145.6			15.2			—			160.8
Other foreign		167.1			—			—			167.1
Total revenues	$	4,901.5		$	977.1		$	1,316.4		$	7,195.0
At December 31, 2019
Identifiable assets:
United States	$	8,132.3		$	655.6		$	1,994.8		$	10,782.7
United Kingdom		4,964.5			126.6			—			5,091.1
Australia		1,217.9			90.0			—			1,307.9
Canada		913.6			3.1			—			916.7
New Zealand		695.9			22.8			—			718.7
Other foreign		817.7			—			—			817.7
Total identifiable assets	$	16,741.9		$	898.1		$	1,994.8		$	19,634.8
Goodwill - net	$	5,548.9		$	66.6		$	3.0		$	5,618.5
Amortizable intangible assets - net		2,289.9			28.8			—			2,318.7