CONDENSED CONSOLIDATED STATEMENTS OF INCOME (UNAUDITED) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
REVENUES
Commissions and fees	$ 1,049.3	$ 925.2	$ 3,193.2	$ 2,668.2
Investment income	16.6	1.2	33.8	1.8
Other income, net	1.8	1.2	3.9	2.0
Total revenues	1,067.7	927.6	3,230.9	2,672.0
EXPENSES
Employee compensation and benefits	531.6	470.3	1,632.9	1,341.3
Other operating expenses	167.7	169.6	490.2	450.6
(Gain)/loss on disposal	(2.8)		(8.9)	(0.9)
Amortization	41.1	43.5	123.7	108.2
Depreciation	10.4	11.3	30.5	28.3
Interest	47.5	41.5	142.1	95.8
Change in estimated acquisition earn-out payables	29.9	(26.6)	29.4	(33.1)
Total expenses	825.4	709.6	2,439.9	1,990.2
Income before income taxes	242.3	218.0	791.0	681.8
Income taxes	66.4	56.9	189.2	155.2
Net income	$ 175.9	$ 161.1	$ 601.8	$ 526.6
Net income per share:
Basic (in dollars per share)	$ 0.62	$ 0.57	$ 2.12	$ 1.86
Diluted (in dollars per share)	0.62	0.57	2.11	1.85
Dividends declared per share (in dollars per share)	$ 0.115	$ 0.103	$ 0.345	$ 0.309