Consolidated Statement of Earnings - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Revenues before reimbursements	$ 2,404.5	$ 2,132.6
Reimbursements	30.8	32.4
Total revenues	2,435.3	2,165.0
Compensation	1,282.0	975.6
Operating	317.3	233.1
Reimbursements	30.8	32.4
Cost of revenues from clean coal activities	22.9	309.1
Interest	63.9	48.1
Depreciation	35.2	38.1
Amortization	124.6	105.2
Change in estimated acquisition earnout payables	20.9	15.0
Total expenses	1,897.6	1,756.6
Earnings before income taxes	537.7	408.4
Provision for income taxes	98.6	14.7
Net earnings	439.1	393.7
Net earnings attributable to noncontrolling interests	0.4	11.6
Net earnings attributable to controlling interests	$ 438.7	$ 382.1
Basic net earnings per share	$ 2.10	$ 1.96
Diluted net earnings per share	2.05	1.92
Dividends declared per common share	$ 0.51	$ 0.48
Commissions [Member]
Revenues before reimbursements	$ 1,565.3	$ 1,125.4
Broker Fees [Member]
Revenues before reimbursements	650.9	553.8
Supplemental Revenue [Member]
Revenues before reimbursements	74.3	66.8
Contingent Revenue [Member]
Revenues before reimbursements	71.6	63.3
Investment Income [Member]
Revenues before reimbursements	18.2	17.1
Net Gains on Divestitures [Member]
Revenues before reimbursements	1.4	4.1
Clean Coal Activities [Member]
Revenues before reimbursements	22.7	300.6
Other Net Revenue (Losses) [Member]
Revenues before reimbursements	$ 0.1	$ 1.5