Goodwill (Tables)

9 Months Ended

Sep. 30, 2022

Goodwill and Intangible Assets Disclosure [Abstract]

Changes in Carrying Value of Goodwill by Reportable Segment

The changes in the carrying value of goodwill by reportable segment for the nine months ended September 30, 2022 are as follows:

(in millions)	Retail			National Programs			Wholesale Brokerage			Services		Total
Balance as of December 31, 2021	$	2,987.2		$	1,089.9		$	488.4		$	171.3	$	4,736.8
Goodwill of acquired businesses		1,389.0			427.8			105.4			—		1,922.2
Goodwill disposed of relating to sales of businesses		(2.6	)		—			—			—		(2.6	)
Foreign currency translation adjustments during the year		(118.1	)		(6.9	)		(9.1	)		—		(134.1	)
Balance as of September 30, 2022	$	4,255.5		$	1,510.8		$	584.7		$	171.3	$	6,522.3