Goodwill and Intangible Assets (Tables)

9 Months Ended

Sep. 30, 2025

Goodwill and Intangible Assets Disclosure [Abstract]

Change in Goodwill

Change in goodwill:

	Nine Months Ended September 30,
	2025		2024
January 1	$	10,677.4	$	10,082.3
Acquisitions	2.5		751.1
Noncontrolling interests in acquired businesses	2.6		24.4
Contingent purchase price obligations of acquired businesses	2.6		—
Dispositions	(66.3)		(6.0)
Foreign currency translation	296.4		76.2
September 30	$	10,915.2	$	10,928.0

Intangible Assets

Intangible assets:

	September 30, 2025						December 31, 2024
	Gross Carrying Value		Accumulated Amortization		Net Carrying Value		Gross Carrying Value		Accumulated Amortization		Net Carrying Value
Acquired intangible assets and internally    developed strategic platform assets	$	1,079.0	$	(623.4)	$	455.6	$	1,096.1	$	(606.1)	$	490.0
Other purchased and internally    developed software	276.8		(243.6)		33.2		258.3		(226.3)		32.0
Total Intangible Assets	$	1,355.8	$	(867.0)	$	488.8	$	1,354.4	$	(832.4)	$	522.0

Amortization of Intangible Assets

Amortization of intangible assets:

	Three Months Ended September 30,				Nine Months Ended September 30,
	2025		2024		2025		2024
Acquired intangible assets and internally developed strategic platform assets	$	21.5	$	22.2	$	63.1	$	65.2
Other purchased and internally developed software	3.9		4.3		11.9		13.4
Amortization Expense	$	25.4	$	26.5	$	75.0	$	78.6